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8/22/2019 Defecte Cutie Conexiuni Motor 2 http://slidepdf.com/reader/full/defecte-cutie-conexiuni-motor-2 1/58 Electrical equipment 77 11 322 302 "The repair procedures given by the manufacturer in this document are based on the technical specifications current when it was prepared. The procedures may be modified as a result of changes introduced by the manufacturer in the production of the various component units and accessories from which his vehicles are constructed." MARCH 2006  All rights reserved by Renault s.a.s. EDITION ANGLAISE Copying or translating, in part or in full, of this document or use of the service part reference numbering system is forbidden without the prior written authority of Renault s.a.s.  © Renault s.a.s. 2006 ENGINE COMPARTMENT CONNECTION UNIT UPC Vdiag No.: 44 Fault finding - Introduction 87G - 1 Fault finding - System operation 87G - 8 Fault finding - Allocation of computer tracks 87G - 10 Fault finding - Replacing components 87G - 11 Fault finding - Configurations and programming 87G - 12 Fault finding - Summary of faults 87G - 13 Fault finding - Interpretation of faults 87G - 14 Fault finding - Conformity check 87G - 17 Fault finding - Statuses and parameters summary table 87G - 27 Fault finding - Interpretation of statuses 87G - 28 Fault finding - Interpretation of parameters 87G - 36 Fault finding - Interpretation of controls 87G - 37 Fault finding - Customer complaints 87G - 54 Fault finding - Fault Finding Chart 87G - 55 87G

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Page 1: Defecte Cutie Conexiuni Motor 2

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Electrical equipment

77 11 322 302

"The repair procedures given by the manufacturer in this document are based on the

technical specifications current when it was prepared.

The procedures may be modified as a result of changes introduced by the

manufacturer in the production of the various component units and accessories fromwhich his vehicles are constructed."

MARCH 2006

All rights reserved by Renault s.a.s.

EDITION ANGLAISE

Copying or translating, in part or in full, of this document or use of the service partreference numbering system is forbidden without the prior written authority of

Renault s.a.s.

© Renault s.a.s. 2006

ENGINE COMPARTMENT CONNECTION UNIT

UPC

Vdiag No.: 44

Fault finding - Introduction 87G - 1

Fault finding - System operation 87G - 8

Fault finding - Allocation of computer tracks 87G - 10

Fault finding - Replacing components 87G - 11

Fault finding - Configurations and programming 87G - 12

Fault finding - Summary of faults 87G - 13

Fault finding - Interpretation of faults 87G - 14

Fault finding - Conformity check 87G - 17Fault finding - Statuses and parameters summary

table 87G - 27

Fault finding - Interpretation of statuses 87G - 28

Fault finding - Interpretation of parameters 87G - 36

Fault finding - Interpretation of controls 87G - 37

Fault finding - Customer complaints 87G - 54

Fault finding - Fault Finding Chart 87G - 55

87G

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Introduction 87G187G

UPC

Vdiag No.: 44ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Introduction

1. SCOPE OF THIS DOCUMENT

This document presents the fault finding procedure applicable to all computers with the following specifications:

2. PREREQUISITES FOR FAULT FINDING

Documentation type

Fault finding procedures (this manual):

– Assisted fault finding (integrated into the fault finding tool), Dialogys.

Wiring diagrams:

– Visu-Schéma (CD-ROM), paper version.

Type of diagnostic tools

– CLIP

Special tooling required

3. RECAP

Procedure

To run diagnostics on the vehicle's computers, switch on the ignition in fault finding mode (forced + after ignition

feed).

Proceed as follows:

– Put the vehicle card in the card reader.

– press and hold Start button (longer than 5 seconds) with start-up conditions not fulfilled,

– connect the diagnostic tool and perform the desired operations.

To cut off the + after ignition feed, proceed as follows:

– disconnect the diagnostic tool, – press the Start button twice briefly (less than 3 seconds),

– Check that the computer warning lights on the instrument panel have gone out to confirm that the

+ after ignition feed has been cut off.

Vehicle(s): MEGANE II, SCENIC II

Function concerned: UPC

Name of computer: UPC

VDIAG No.: 44

Special tooling required

Multimeter

Universal bornier

Note:The left-hand and right-hand discharge bulb computers are powered when the dipped headlights are lit. Fault

finding procedures can only be carried out on them after the ignition has been switched on in fault finding mode

(+ after ignition imposed) and the dipped headlights are on.

UPC84 2.0

Edition 587G-1

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Introduction 87G

87G-2

UPC

Vdiag No.: 44

Faults

Faults are declared as either present or stored (depending on whether they appeared in a certain context and have

disappeared since, or whether they remain present but have not been diagnosed within the current context).

The present or stored status of the fault should be taken into consideration when the fault finding tool is used after

the + after ignition feed has been connected (without any of the system components being activated).

For a present fault, apply the procedure described in the Interpretation of faults section.

For a stored fault, note the faults displayed and apply the instructions in the Notes section.

If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with the fault

If the fault is not confirmed, check:

– the electrical lines which correspond to the fault,

– the connectors on these lines (corrosion, bent pins, etc.),

– the resistance of the component detected as faulty,

– the condition of the wires (melted or split insulation, wear).

Conformity check

The aim of the conformity check is to check statuses and parameters that do not produce a fault display on the

diagnostic tool because they are inconsistent. Therefore, this phase is used:

– to carry out fault finding on faults that do not have a fault display, and which may correspond to a customer

complaint.

– to check that the system is operating correctly and that there is no risk of a fault recurring after repair.

This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.

If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the

corresponding fault finding page.

Customer complaints - Fault finding chart

If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be treated by

customer complaints.

A summary of the overall procedure to follow is provided on the following

page in the form of a flow chart.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Introduction 87G

87G-3

UPC

Vdiag No.: 44

4. FAULT FINDING PROCEDURE

Check the battery charge and the

condition of the fuses

Print the system fault finding log

(available on CLIP or in the MR

or NT)

Connect CLIP

noDialogue with

computer?

yes

Read the faults

noFaults

present

yes

Deal with present faults

Deal with stored faults

noThe cause is still

present

Fault

solved

yes

See ALP no. 1

Conformity check

noThe cause is still

present

Fault

solved

Use the fault finding charts (ALPs)

noThe cause is still

present

Fault

solved

Contact the Techline with the

completed fault finding log

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Introduction 87G

87G-4

UPC

Vdiag No.: 44

Wiring check:

Fault finding problems:

Disconnecting the connectors and/or manipulating the wiring harness may temporarily remove the cause of a fault.Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault is not

present when the analysis is made (stored fault).

Visual inspection:

Look for damage under the bonnet and in the passenger compartment.

Carefully check the protective parts, insulators and wiring harness routing.

Look for signs of oxidation.

Tactile inspection:

While manipulating the wiring harness, use the diagnostic tool to note any change in fault status from stored to

present.

Make sure that the connectors are properly tightened,

Apply light pressure to the connectors,

Twist the wiring harness.

If there is a change in status, try to locate the source of the fault.

Inspection of each component:

Disconnect the connectors and check the appearance of the clips and tabs, as well as their crimping (no crimping on

the insulating section).

Make sure that the clips and tabs are properly locked in the sockets.

Check that no clips or tabs have been dislodged during connection.

Check the clip contact pressure using an appropriate model of tab.

Resistance check:

Check the continuity of entire lines, then section by section.

Look for a short circuit to earth, the +12 V feed or with another wire.

If a fault is detected, repair or replace the wiring harness.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Introduction 87G

87G-5

UPC

Vdiag No.: 44

5. FAULT FINDING PROCEDURE

You are always asked for this log:

– when requesting technical assistance from the Techline,

– for approval requests when replacing parts for which approval is obligatory,

– to be enclosed when returning monitored parts on request. The log is needed for warranty reimbursement, andenables better analysis of the parts removed.

6. SAFETY ADVICE

All work on components requires that the safety rules be obeyed to prevent damage or injury:

– Make sure that the battery is properly charged to avoid damaging the computers with a low load.

– Use the appropriate tools.

IMPORTANT!

IMPORTANT

Any fault on a complex system requires thorough fault finding with the appropriate tools. The

FAULT FINDING LOG, which should be completed during the procedure, enables you to keep

track of the procedure which is carried out. It is an essential document when consulting the

manufacturer.

IT IS THEREFORE MANDATORY TO FILL OUT A FAULT FINDING LOG FOR EACH FAULT FINDING

PROCEDURE.

UPC84 2.0

Edition 5

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List of monitored parts: Computer

FAULT FINDING LOGSystem: All types

Page 1/2

q Administrative identification

Date 2 0

Log completed by

VIN

Engine

Fault finding tool CLIP

Update version

q Customer complaint

Please specify:

q Conditions under which the customer complaint occurs

Please specify:

q Documentation used in fault finding

Fault finding procedure used

Type of fault finding manual: Workshop Repair Manual Technical Note Assisted fault finding

Fault finding manual no:

Wiring diagram used

Wiring Diagram Technical Note No:

Other documentation

Title and/or part number:

FD 97Fault finding log

page to print or photocopy - page to print or photocopy - page to print or photocopy

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To be read with the Fault finding tool (Identification screen):

FAULT FINDING LOGSystem: All types

Page 2/2

q Computer identification and system parts replaced

Part 1 part no.

Part 2 part no.

Part 3 part no.

Part 4 part no.

Part 5 part no.

Computer part no.

Supplier no.

Program no.

Software version

Calibration no.

VDIAG

q Faults found with the fault finding tool

Fault no. Present Stored Fault name Specification

q Conditions under which fault occurs

Status or parameter no. Parameter name Value Unit

q System-specific information

Description:

q Additional information

What factors led you to replace the

computer?

What other parts were replaced?

Other faulty functions?

Please specify:

FD 97

Fault finding log

page to print or photocopy - page to print or photocopy - page to print or photocopy

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - System operation 87G

87G-8

UPC

Vdiag No.: 44

Fault finding - System operation

1. GENERAL FUNCTIONING

The Protection and Switching Unit (UPC) is involved in the following functions:

– distribution and protection of the electric power,

– keyless vehicle, – wipers,

– lighting,

– de-icing,

– air conditioning,

– oil pressure detection,

Distribution and protection of the electric power supply

The principal function of the Protection and Switching Unit is to switch and distribute the power supply to the vehicle's

systems, actuators or computers.

Another part of the power supply distribution is housed in the engine compartment connection unit but it is not

electronically controlled by the computer.

+12 V battery feed

The Protection and Switching Unit receives power from the battery via the 1 track screwed-in connector and

redistributes the +12 V around the vehicle.

+ after ignition feed

The UCH requests the + after ignition feed via the multiplex network. When the Protection and Switching Unit receives

this request, it unconditionally controls the after ignition relay.

Managing the Power Supply

The computer transmits the alternator charge signal via the multiplex network.

Keyless vehicleIn the keyless vehicle function, the Protection and Switching Unit is involved with the starting sub-function. The

computer:

– receives the start request from the Protection and Switching Unit via the multiplex network,

– checks that the start conditions are satisfied then instructs the starter relay,

– can inhibit or switch off the starter relay control in response to a signal to prohibit starting transmitted by the

injection computer via the multiplex network.

Air conditioning

For details on the operation of this function and the role of the Protection and Switching Unit in its operation (see 62A,

Air conditioning, Function layout and general operating mode).

Cold loopThe computer receives the compressor switch-on request from the injection via the multiplex network.

The computer controls the compressor clutch engagement relay.

Heating

The computer also controls the rear screen de-icer and the electric door mirrors.

Fan assembly

When requested by the engine management, the Protection and Switching Unit supplies power to the fan assembly.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - System operation 87G

87G-9

UPC

Vdiag No.: 44

Front wipers

The Protection and Switching Unit receives requests from the UCH wipers via the multiplex network.

The computer then executes the following requests:

– low or high speed windscreen wiper,

– windscreen wiper park position

Lights

The Protection and Switching Unit receives lighting requests from the UCH via the multiplex network.

The computer then executes the following requests:

– side lights

– dipped headlights,

– main beam headlights,

– front fog light.

Oil pressure detection,

The Protection and Switching Unit receives the oil pressure sensor signal and makes it available via the multiplex

network.

2. PROTECTION AND SWITCHING UNIT LEVELS

Vehicles can be equipped with 3 levels of Protection and Switching Unit:

– Entry level Protection and Switching Unit N1,

– Top of the range Protection and Switching Unit N2,

– Top of the range Protection and Switching Unit N3,

Only the Top of the range Protection and Switching Units N2 and N3 are available as spare parts.

The N2 and N3 versions can be distinguished in the way the high speed fan assembly is controlled:

– in the N2 version, the Protection and Switching Unit controls an external relay,

– in the N3 version, the relay is integrated in the Protection and Switching Unit.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Allocation of computer tracks 87G

87G-10

UPC

Vdiag No.: 44

Fault finding - Allocation of computer tracks

The Protection and Switching Unit is located in the engine compartment connection unit (engine compartment).

See the Technical Note Wiring Diagram for the faulty vehicle for allocation of tracks and to consult the Wiring

Diagrams.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Replacing components 87G

87G-11

UPC

Vdiag No.: 44

Fault finding - Replacing components

1. REPLACING THE COMPUTER

See Mechanical MR 364, 87G, Engine compartment connection unit (Megane) or MR 370 Mechanical, 87G,

Engine compartment connection unit (Scenic).

Following replacement:q Configure the alternator type using command CF001 Alternator Type (see Configurations and programming).

q Find the Vehicle Identification Number using command VP003 Write the VIN.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Configurations and programming 87G

87G-12

UPC

Vdiag No.: 44

Fault finding - Configurations and programming

NOTES Ignition on, engine off.

No. Configuration

Related

configuration

reading

Note:

CF001

ALTERNATOR TYPE:

TG11 110 VALEO

SG12 VALEO

LIE8 150 BOSCH

SG15L VALEO

MELCO 8GM

LC001

Enter information about the

alternator fitted in the vehicle

then confirm.

(MELCO = Mitsubishi

Electronics Corporation)

No. Other parameters Note:

VP003 WRITE THE VIN:Enter the vehicle identification number then

confirm.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Summary of faults 87G

87G-13

UPC

Vdiag No.: 44

Fault finding - Summary of faults

Tool fault Associated DTC Fault finding tool title

DF002 9210FAN ASSEMBLY HIGH SPEED RELAY CONTROL

CIRCUIT

DF005 920E INTERNAL ELECTRONIC FAULT

DF009 920D + AFTER IGNITION FEED CIRCUIT

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of faults 87GUPC

Vdiag No.: 44

Fault finding - Interpretation of faults

DF002PRESENT

FAN ASSEMBLY HIGH SPEED RELAY CONTROL CIRCUIT

CC.1 : Short circuit to +12 V

NOTES

Special notes:

The function is inhibited if the fault is present.

Reactivation of the function by a new after ignition request.

Measure the resistance between tracks 1 and 2.

If the resistance is not 65 ΩΩΩΩ ±±±± 10 ΩΩΩΩ, replace the relay.

Remove the relay and ensure insulation against +12 V on the connection:

Protection and Switching Unit connector PPM2 track 2 Track 2 of the fan assembly relay

connector

Repair if necessary.

If the fault continues, check the absence of +12 V on track 2 of connector PPM2 of the Protection and

Switching Unit.If +12 V is present, contact the Techline.

AFTER REPAIR Clear the computer memory.

Turn the ignition off and back on, then run another check with the diagnostic tool.

UPC84 2.0

Edition 587G-14

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of faults 87G

87G-15

UPC

Vdiag No.: 44

DF005PRESENT

INTERNAL ELECTRONIC FAULT

DEF : Internal electronic fault

NOTES None

Disconnect the battery for 30 seconds, then reconnect it.

If the fault is still present, contact the Techline.

AFTER REPAIR Clear the computer memory.

Turn the ignition off and back on, then run another check with the diagnostic tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of faults 87G

87G-16

UPC

Vdiag No.: 44

DF009PRESENT

+ AFTER IGNITION FEED CIRCUIT

DEF : Consistency

NOTES None

Check the voltage of the battery.

Check that the status of ET026 + after ignition feed is consistent

Check the condition of the fuses on the battery positive terminal.

Repair if necessary.

Check the condition and the connection of the + battery feed to the Protection and Switching Unit mounting

and to connector P2.Repair if necessary.

With the ignition off, check the absence of +12 V on track 6 of connector PPM2 of the Protection and Switching

Unit.

If +12 Vfound, remove the following fuses one by one to pinpoint the faulty track:

– fuse 5C (track 6 connector PPM2),

– fuse 5D (track 1 connector PEH),

– fuse 5E (track 10 connector PPH2),

– fuse 5F (track 11 connector PPH2), – fuse 5G (track 7 connector PPM2),

– fuse 5H (track 10 connector PPM2).

With the help of a wiring diagram, check the insulation against +12 V of the connection between the faulty

track on the Protection and Switching Unit and the computers or consumers connected to this track.

With the ignition on, check for the presence of +12 V on one of the following tracks on the Protection and

Switching Unit: – track 1 of the connector PEH

– tracks 6, 7 and 10 of connector PPM2

– tracks 10 and 11 of connector PPH2

If the fault is still present, contact the Techline.

AFTER REPAIR Clear the computer memory.

Turn the ignition off and back on, then run another check with the diagnostic tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-17

UPC

Vdiag No.: 44

Fault finding - Conformity check

MAIN SCREEN

NOTES Only check conformity after a complete check using the diagnostic tool.

Test conditions: Engine stopped, ignition on.

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1 Charging circuit ET001:Battery warning

lightLIT

If there are any faults,

consult the corresponding

fault finding procedure.

2Oil pressure

contactET027:

Oil pressure

contactCLOSED

3 Gearbox ET004: Reverse gear engaged

YESNO

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-18

UPC

Vdiag No.: 44

KEYLESS VEHICLE: Starting

NOTES Only check conformity after a complete check using the diagnostic tool.

Test conditions: Engine stopped, ignition on.

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1 Gearbox

ET004:Reverse gear

engaged

YES

NO

If there are any faults,

consult the corresponding

fault finding procedure.

ET005:

Manual gearbox

lever

NEUTRAL

NOT IN NEUTRAL

NOT SUPPORTED, if

the vehicle is fitted withan automatic

transmission

2 Starting ET010:Starting

conditions met

YES, if the starting

conditions are met and

the Start button is then

pressed

NO, if the starting

conditions are not met

or if the Start button is

not pressed

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-19

UPC

Vdiag No.: 44

AIR CONDITIONING: Heating

AIR CONDITIONING: Cold loop

NOTES Only check conformity after a complete check using the diagnostic tool.

Test conditions: Engine stopped, ignition on.

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1 Starting

PR010: Alternator

charge

In %

The value must be

fixed, above 98%

If there are any faults,

consult the corresponding

fault finding procedure.AC011:

Rear screen

heating

The heating resistors

of the rear screen and

door mirrors (if thevehicle has heated

door mirrors) must be

receiving power and

warming up

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1 Fan assembly

AC009:Low speed fan

assembly

The fan should beheard running at low

speed

If there are any faults,

consult the corresponding

fault finding procedure.

AC010:High speed fan

assembly

The fan should be

heard running at high

speed

This command cannot

be executed in

vehicles which are not

fitted with air

conditioning

2 Air conditioning AC008:Compressor

control

Compressor clutch

should be heard

(command prohibited

with the engine

running)

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-20

UPC

Vdiag No.: 44

WIPERS: Wiper power

NOTES Only check conformity after a complete check using the diagnostic tool.

Test conditions: Engine stopped, ignition on.

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1 Park position AC012:

Windscreen

wiper park

position test

The wiper should run

for one sweep then

stop in its initial

position.

If there are any faults,consult the corresponding

fault finding procedure.

2 Wiper protection ET002:

Windscreen

wiper protection INACTIVE

3 Wipers

AC005:Windscreen

wiper low speed

The wiper should run

at low speed.

AC006:

Windscreen

wiper high

speed

The wiper should run

at high speed.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-21

UPC

Vdiag No.: 44

LIGHTING: Lighting power

NOTES Only check conformity after a complete check using the diagnostic tool.

Test conditions: Engine stopped, ignition on.

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1 Lighting

AC003: Side lights

The front and rear side

lights and number

plate lights should light

up along with the

controls and switches

in the passenger compartment.

If there are any faults,

consult the corresponding

fault finding procedure.AC002:Dipped

headlights

The dipped beam

headlights should

come on.

AC001:Main beam

headlights

The main beam

headlights should

come on.

AC004: Front fog lightsThe front fog lights

should come on.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-22

UPC

Vdiag No.: 44

MAIN SCREEN

NOTES Only check conformity after a complete check using the diagnostic tool.

Operating Condition: engine running.

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1 Charging circuit ET001:Battery warning

lightOFF

If there are any faults,

consult the corresponding

fault finding procedure.

2Oil pressure

contactET027:

Oil pressure

contactOPEN

3 Gearbox ET004: Reverse gear engaged

YESNO

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-23

UPC

Vdiag No.: 44

KEYLESS VEHICLE: Starting

NOTES Only check conformity after a complete check using the diagnostic tool.

Operating Condition: engine running.

Order FunctionParameter or Status

checked or ActionDisplay and Notes Fault finding

1 Gearbox

ET004:Reverse gear

engaged

YES

NO

If there are any faults,

consult the corresponding

fault finding procedure.

ET005:

Manual gearbox

lever

NEUTRAL

NOT IN NEUTRAL

NOT SUPPORTED, if

the vehicle is fitted withan automatic

transmission

2 Starting ET010:Starting

conditions met

YES, if the starting

conditions are met and

the Start is then button

pressed

NO, if the starting

conditions are not met

or if the Start button is

not pressed

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-24

UPC

Vdiag No.: 44

AIR CONDITIONING: Heating

AIR CONDITIONING - Cold loop:

NOTES Only check conformity after a complete check using the diagnostic tool.

Operating Condition: engine running.

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1 Starting

PR010: Alternator

charge

In %

The value varies

according to the

consumption of

electricity.If there are any faults,

consult the corresponding

fault finding procedure.

AC011:Rear screen

heating

The heating resistorsof the rear screen and

door mirrors (if the

vehicle has heated

door mirrors) must be

receiving power and

warming up

Order Function

Parameter or Status

checked or Action Display and notes Fault finding

1 Fan assembly

AC009:Low speed fan

assembly

The fan should be

heard running at low

speed

If there are any faults,

consult the corresponding

fault finding procedure.

AC010:High speed fan

assembly

The fan should be

heard running at high

speed

This command cannot

be executed in

vehicles which are not

fitted with air conditioning

2 Air conditioning AC008:Compressor

control

(command

prohibited with

engine running)

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-25

UPC

Vdiag No.: 44

WIPERS: Wiper power

NOTES Only check conformity after a complete check using the diagnostic tool.

Operating Condition: engine running.

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1

Park position AC012:

Windscreen

wiper park

position test

The wiper should be

activated for one

sweep then stop in its

initial position.

If there are any faults,consult the corresponding

fault finding procedure.

Wiper protection ET002:

Windscreen

wiper protection INACTIVE

Wipers

AC005:Windscreen

wiper low speed

The wiper should run

at low speed.

AC006:

Windscreen

wiper high

speed

The wiper should run

at high speed.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Conformity check 87G

87G-26

UPC

Vdiag No.: 44

LIGHTING: Lighting power

NOTES Only check conformity after a complete check using the diagnostic tool.

Operating Condition: engine running.

Order FunctionParameter or Status

checked or ActionDisplay and notes Fault finding

1 Lighting

AC003: Side lights

The front and rear side

lights and number

plate lights should light

up along with the

controls and switches

in the passenger compartment.

If there are any faults,

consult the corresponding

fault finding procedure.AC002:Dipped

headlights

The dipped beam

headlights should

come on.

AC001:Main beam

headlights

The main beam

headlights should

come on.

AC004: Front fog lightsThe front fog lights

should come on.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Statuses and parameters summary table 87G

87G-27

UPC

Vdiag No.: 44

Fault finding - Statuses and parameters summary table

Tool status Fault finding tool title

ET001 BATTERY WARNING LIGHT

ET002 WINDSCREEN WIPER PROTECTION

ET004 REVERSE GEAR ENGAGED

ET005 MANUAL GEAR LEVER POSITION

ET010 STARTING CONDITIONS MET

ET013 HIGH SPEED FAN ASSEMBLY RELAY CONTROL

ET026 + AFTER IGNITION FEED

ET027

Tool parameter Fault finding tool title

PR010 ALTERNATOR CHARGE

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of statuses 87G

87G-28

UPC

Vdiag No.: 44

Fault finding - Interpretation of statuses

ET001BATTERY WARNING LIGHT

NOTES

Check that the status is OUT with engine running and LIT with engine stopped, ignition

on.

Check consistency with the instrument panel warning light.

With engine running, check that the battery voltage is well above +12 V.

Perform a fault finding procedure on the charge circuit if necessary.

Check the status and the connection of the PEM connector on the Protection and Switching Unit and the

connections on the alternator.Repair if necessary.

Switch off the ignition and ensure the insulation against +12 V and the continuity of the connection:

Protection and Switching Unit PEM connector track 8 Track 1 of the 2-track alternator

connector

Repair if necessary.

With the ignition on, ensure insulation against earth and continuity of the connection between:

Protection and Switching Unit PEM connector track 8 Track 1 of the 2-track alternator

connector

Repair if necessary.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of statuses 87G

87G-29

UPC

Vdiag No.: 44

ET002WINDSCREEN WIPER PROTECTION

NOTES

First check the good operation of the windscreen wiper motor by running the

commands AC005 Windscreen wiper low speed and AC006 Windscreen wiper

high speedcontrols, then check the park position using the command AC012 Test

windscreen wiper park position.

These statuses are in order of severity or persistence of wiper malfunction.

– If the status is INACTIVE, the wipers are functioning normally.

– If the status is LOW SPEED, the Protection and Switching Unit has found an

abnormal high speed wiper operation for more than 6 seconds (blocked or

jamming); wipers are therefore restricted to low speed following a request for high

speed wipers, – If the status is TIME DELAYED, the wipers are stopped for 10 seconds after a fault

has been found is persisting (blocked or jamming),

– If the status is BLOCKED, the wipers are stopped for 30 seconds after a period of

malfunction greater than 2 minutes.

The status returns to INACTIVE as soon as the UCH requests another wiping setpoint

(wiper control adjusted, or request by the rain sensor).

Make sure that nothing is mechanically blocking movement of the wiper arms (blades stuck, condition and

assembly of the wiper mechanism linkage and no object is interfering with the motion of the mechanism).

Check that the windscreen wiper mechanism is not sticking.

Repair if necessary.

Check the condition and connection of connectors PPH2, PEH on the Protection and Switching Unit and of the

windscreen wiper motor.

Repair if necessary.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of statuses 87G

87G-30

UPC

Vdiag No.: 44

ET002

(continued)

Check the continuity and insulation against earth of the following connections:

Protection and Switching Unit connector PEH track 6 Track 2, windscreen wiper motor

connector

Protection and Switching Unit connector PPH2 track 1 Track 5, windscreen wiper motor

connector

Protection and Switching Unit connector PPH2 track 2 Track 4, windscreen wiper motor

connector Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of statuses 87G

87G-31

UPC

Vdiag No.: 44

MANUAL GEARBOX

ET004REVERSE GEAR ENGAGED

NOTES Check fuse 5C on the Protection and Switching Unit and replace if necessary.

Check the condition and connection of the reverse gear switch connector and connector PPM2 of the

Protection and Switching Unit.

Repair if necessary.

With the ignition on and reverse engaged, check for the presence of +12 V on track 9 of connector PPM2.

If not correct, ensure the continuity and insulation against earth of the connections:

Protection and Switching Unit connector PPM2 track 9 Track 1 (track 3 of ND0 gearbox)

of switch

Protection and Switching Unit connector PPM2 track 6 Track 2 (track 1 of ND0 gearbox)

of switch

Repair if necessary.

With reverse gear engaged, check the continuity of tracks 1 and 2 (or tracks 1 and 3 of ND0 gearbox) of

switch.

Replace the reverse gear switch if necessary.

If the fault is still present, contact the Techline.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of statuses 87G

87G-32

UPC

Vdiag No.: 44

AUTOMATIC TRANSMISSION

ET004

(continued)

Check the condition and connection of the multifunction switch connector and connector PPM2 of the

Protection and Switching Unit.

Repair if necessary.

With the ignition on and reverse engaged, check for the presence of +12 V on track 9 of connector PPM2.

If not correct, ensure the continuity and insulation against earth of the connections:

Protection and Switching Unit connector PPM2 track 9 Track 1 of the multifunction switch

Protection and Switching Unit connector PPM2 track 6 Track 2 of the multifunction switch

Repair if necessary.With reverse gear engaged, check the continuity of tracks 1 and 2 of the switch.

Replace the multifunction switch if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of statuses 87G

87G-33

UPC

Vdiag No.: 44

ET005MANUAL GEAR LEVER POSITION

NOTES Check fuse 5C on the Protection and Switching Unit and replace if necessary.

Only applies to vehicles fitted with automatic transmission.

Check the status and the connection of the neutral connector switch and connectors PPM2 and PEM of the

Protection and Switching Unit.

Repair if necessary.

With the ignition on and in neutral, check for the presence of +12 V on track 6 of connector PEM. If not correct,

ensure the insulation against earth and the continuity of the connection between the switch and track 6 of the connector PEM on the Protection and Switching Unit.

Check the correct operation of the switch:

there should be continuity between tracks 1 and 2 of the switch when the gearbox is in neutral.

there should be an open circuit between tracks 1 and 2 of the switch when in gear.

If faulty, replace the switch.

With the ignition on, check for the presence of +12 V on track 2 (track 1 if equipped with ND0 gearbox) of the

neutral switch connector.

If not correct, check for the insulation against earth and the continuity of the connection between the switch

and track 6 of connector PPM2 of the Protection and Switching Unit.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of statuses 87G

87G-34

UPC

Vdiag No.: 44

ET009OIL PRESSURE CONTACT

NOTES CLOSED engine stopped, OPEN engine running.

Check the status and the connection of connector PEM of the Protection and Switching Unit and of the oil

pressure sensor.

Repair if necessary.

Make sure that the sensor is securely mounted on the engine.

Check the insulation against +12 V and the continuity of the connection between:

Protection and Switching Unit connector PEM track 12 Track 1 of the pressure sensor

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of statuses 87G

87G-35

UPC

Vdiag No.: 44

ET010STARTING CONDITIONS MET

NOTES No particular notes.

Check in the Keyless vehicle function that the starting conditions are met.

The Protection and Switching Unit is involved with the starting function in that it manages the gearbox switches.

Check the proper operation of the gearbox switches on the statuses ET004 Reverse gear engaged and

ET005 Manual gearbox gear lever position then perform fault finding on the starting and engine

management functions of the Protection and Switching Unit.

If the conditions are met and the starter does not work, consult Fault Finding Chart 2.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of parameters 87G

87G-36

UPC

Vdiag No.: 44

Fault finding - Interpretation of parameters

PR010 ALTERNATOR CHARGE

NOTES

Check the configuration readings to make sure that the correct alternator type has

been configured.

With the engine stopped, the value should be fixed, above 98%.

With the engine running, the value varies according to the consumption of electricity.

The value should not be fixed.

Carry out fault finding on the charge circuit.

Disconnect the 2-track connector of the alternator.With the ignition on, check for the presence of +12 V on track 2 of the alternator.

With the ignition off, check for the presence of earth on track 2 of the alternator.

Repair if necessary.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87GUPC

Vdiag No.: 44

Fault finding - Interpretation of controls

Without xenon lights

AC001MAIN BEAM HEADLIGHTS

NOTES

Check:

– the condition and connection of fuses 8A and 8B of the Protection and Switching

Unit,

– the condition of the bulbs.

Replace them, if necessary.

Check the condition and connection of the connector PPA and the fuses of the Protection and Switching Unit.Repair if necessary.

Check the condition and connection of the headlight connectors.

Repair if necessary.

Check for the presence of earth on connector R9 and then on track 1 of the headlight connector.

Repair if necessary.

Check for the presence of +12 V on track 4 of the headlights while they are being controlled by command

AC001.

If correct, replace the bulbs.

If not correct, ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector PPA track 3 Track 4 left-hand headlight

Protection and Switching Unit connector PPA track 4 Track 4 right-hand headlight

Repair if necessary.

If the fault is still present, contact the Techline.

UPC84 2.0

Edition 587G-37

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-38

UPC

Vdiag No.: 44

With xenon lights

AC001

(continued)

Check the condition and connection of connector PPA and the fuses in the Protection and Switching Unit.

Repair if necessary.

Check the condition and connection of the headlight connectors.

Repair if necessary.

Check for the presence of earth on connector R9 and then on tracks 4 and 10 of the headlights.

Repair if necessary.

Check for the presence of +12 V on track 5 (for Megane-type vehicles) or track 4 (for Scenic-type vehicles)

of the headlights while they are being controlled by command AC001.

If correct, apply the fault finding procedure (see 80C, Discharge bulbs).

If not correct, ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector PPA track 3 Track 5 or track 4 (according to

vehicle type) of the left-hand

headlight

Protection and Switching Unit connector PPA track 4 Track 5 or track 4 (according to

vehicle type) of the right-hand

headlight

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-39

UPC

Vdiag No.: 44

Without xenon lights

AC002DIPPED HEADLIGHTS

NOTES

Check:

– the condition and connection of fuses 8C and 8D of the Protection and Switching

Unit,

– the condition of the bulbs.

Replace them, if necessary.

Check the condition and connection of connector PPA and the fuses of the Protection and Switching Unit.Repair if necessary.

Check the condition and connection of the headlight connectors.

Repair if necessary.

Check for the presence of earth on connector R9 and then on track 1 of the headlight connector.

Repair if necessary.

Check for the presence of +12 V on track 2 of the headlights while they are being controlled by command

AC002.

If correct, replace the bulb(s).

If not correct, ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector PPA track 6 Track 2 left-hand headlight

Protection and Switching Unit connector PPA track 5 Track 2 right-hand headlight

Repair if necessary.

If the fault is still present, contact the Techline.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-40

UPC

Vdiag No.: 44

With xenon lights

AC002

(continued)

Check the condition and connection of the connector PPA and the fuses of the Protection and Switching Unit.

Repair if necessary.

Check the condition and connection of the headlight connectors.

Repair if necessary.

Check for the presence of earth on connector R9 and then on tracks 4 and 10 of the headlight connectors.

Repair if necessary.

Check for the presence of +12 V on track 3 of the headlights while they are being controlled by command

AC002.

If correct, apply the fault finding procedure (see 80C, Discharge bulbs).

If not correct, ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector PPA track 6 Track 3 left-hand headlight

Protection and Switching Unit connector PPA track 5 Track 3 right-hand headlight

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-41

UPC

Vdiag No.: 44

Without xenon lights

AC003SIDE LIGHTS

NOTES

Check:

– the condition and the connection of fuses 7A and 7B of the Protection and Switching

Unit,

– the condition of the bulbs.

Replace them, if necessary.

Check the condition and connection of connectors PPA, PPH2 and the fuses of the Protection and SwitchingUnit.

Repair if necessary.

Check the condition and connection of the headlights and rear lights.Repair if necessary.

Check for the presence of earth on junction R9 then on track 1 of the headlights and on track 2 of the rear

lights and number plate light.

Repair if necessary.

Check for the presence of +12 V on track 5 of the headlights and track 1 of the rear lights and the license plate

lights while they are being controlled by command AC003.If correct, replace the bulb(s).

If not correct, Ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector PPH2 track 6 Track 1 left-hand rear light

Protection and Switching Unit connector PPH2 track 7 Track 1 right-hand rear light and

license plate light

Protection and Switching Unit connector PPA track 1 Track 5 left-hand headlight

Protection and Switching Unit connector PPA track 2 Track 5 right-hand headlight

Repair if necessary.

If the fault is still present, contact the Techline.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-42

UPC

Vdiag No.: 44

With xenon lights

AC003

(continued)

Check the condition and connection of connectors PPA, PPH2 and the fuses of the Protection and Switching

Unit.

Repair if necessary.

Check the condition and connection of the headlights and rear lights.

Repair if necessary.

Check for the presence of earth on junction R9 then on tracks 4 and 10 of the headlights and on track 2 of

the rear lights and licence plate light.Repair if necessary.

Check for the presence of +12 V on track 9 of the headlights and track 1 of the rear lights and license plate

light while they are being controlled by command AC003.

If correct, replace the bulb(s).

If not correct, ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector PPH2 track 6 Track 1 left-hand rear light

Protection and Switching Unit connector PPH2 track 7 Track 1 right-hand rear light and

license plate light

Protection and Switching Unit connector PPA track 1 Track 9 left-hand headlight

Protection and Switching Unit connector PPA track 2 Track 9 right-hand headlightRepair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-43

UPC

Vdiag No.: 44

AC004FRONT FOG LIGHTS

NOTES

Check:

– the condition and connection of fuse 10,

– the condition of the bulbs.

Replace them, if necessary.

Check the condition and the connection of connector PPA of the Protection and Switching Unit.

Repair if necessary.

Check the condition and connection of the bulb connectors.Repair if necessary.

Check for the presence of earth on junction R9 then check the connections of the bulb connectors.

Repair if necessary.

Check for the presence of +12 V on the fog light connectors they are being controlled by command AC004.

If correct, replace the bulb(s).

Check the continuity and insulation of the following connections:

Protection and Switching Unit connector PPA track 8 Track 1 of the front left-hand

foglight connector

Protection and Switching Unit connector PPA track 7 Track 1 of the front right handfoglight connector

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-44

UPC

Vdiag No.: 44

AC005WINDSCREEN WIPER LOW SPEED

NOTES

Check:

– the condition and connection of fuse 9.

Replace it if necessary.

Check the condition and the connection of connector PPH2 of the Protection and Switching Unit.

Repair if necessary.

Check the status and connections of the windscreen wiper motor connector.

Repair if necessary.

Check for the presence of earth on track 1 of the windscreen wiper motor.

Repair if necessary.

Check for the presence of +12 V on track 4 of the windscreen wiper motor while it is being controlled by

command AC005.

If correct, replace the motor.

Ensure the insulation and continuity of the connection between:

Protection and Switching Unit connector PPH2 track 2 Track 4 of the windscreen wiper

motor

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-45

UPC

Vdiag No.: 44

AC006WINDSCREEN WIPER HIGH SPEED

NOTES

Check:

– the condition and connection of fuse 9.

Replace it if necessary.

Check the condition and the connection of connector PPH2 of the Protection and Switching Unit.

Repair if necessary.

Check the status and connections of the windscreen wiper motor connector.

Repair if necessary.

Check for the presence of earth on track 1 of the windscreen wiper motor.

Repair if necessary.

Check for the presence of +12 V on track 5 of the windscreen wiper motor while it is being controlled by

command AC006.

If correct, replace the motor.

Ensure the insulation and continuity of the connection between:

Protection and Switching Unit connector PPH2 track 1 Track 5 of the windscreen wiper

motor

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-46

UPC

Vdiag No.: 44

AC008COMPRESSOR CONTROL

NOTES

Command prohibited with the engine running.

Check:

– the condition and connection of fuse 4.

Replace it if necessary.

Check the condition and the connection of connector PPM2 of the Protection and Switching Unit.

Repair if necessary.

Check the condition and connection of the air conditioning compressor connector.Repair if necessary.

Make sure that the compressor is properly earthed.

Check for the presence of +12 V on the compressor connector while it is being controlled by command AC008.

If not correct, ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector PPM2 track 5 Air conditioning compressor

connector.

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-47

UPC

Vdiag No.: 44

AC009LOW-SPEED FAN UNIT

NOTES

Check:

– the condition and connection of fuse 11.

Replace it if necessary.

The engine cooling fan must be off.

Make sure nothing is mechanically blocking the rotation of the blade.

Check the condition and connection of the fan unit connector.

Repair if necessary.

Ensure track 2 of the fan unit is properly earthed.

Check that the resistor fitted in the fan unit (if present), is not in open circuit and that its resistance is equal to

0.69 ΩΩΩΩ ±±±± 20%.

If not correct, replace it.

Check for the presence of +12 V on the fan unit connector while it is being controlled by command AC009.

If correct, replace the fan unit.

If not correct, ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector PPM1 1 track 4 Track 1 of the fan unit

ORProtection and Switching Unit connector PPM1 track 4 Resistor fitted on the fan unit (if

present)

Resistor fitted on the fan unit (if present) Track 1 of the fan unit

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-48

UPC

Vdiag No.: 44

Type N2 Protection and Switching Unit

AC010HIGH-SPEED FAN UNIT

NOTES

This control is only valid for variants fitted with air conditioning.

Check:

– the condition and the connection of fuse 11 (Protection and Switching Unit level N3

only).

Replace it if necessary.

Check the condition and connection of the fan unit connector.Repair if necessary.

Make sure that the fan unit is properly earthed.

Test the resistance of the external relay controlling the high speed fan unit: 65 ΩΩΩΩ ±±±± 10ΩΩΩΩ.

Replace it if necessary.

Check for the presence of +12 V on track 1 of the external control relay of the high speed fan unit while it is

being controlled by command AC010.

If not correct, ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector PPM2 track 3 Track 1 of the external control

relay of the high speed fan unitRepair if necessary.

Check for the presence of earth on track 2 of the external control relay of the high speed fan unit.

If not correct, ensure there is continuity and insulation against +12 V on the following connection:

Protection and Switching Unit connector PPM2 track 2 Track 2 of the external control

relay of the high speed fan unit

Repair if necessary.

Check for the presence of +12 V on track 1 of the fan unit while running command AC010.

If not correct, ensure the insulation against earth and continuity of the connections:

Track 1 fan unit Track 5 of the external control

relay of the high speed fan unitRepair if necessary.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-49

UPC

Vdiag No.: 44

AC010

(continued 1)

Check for the presence of +12 V battery on track 3 of the external control relay of the high speed fan unit.

If not correct, ensure the insulation against earth and continuity of the connections:

External control relay high speed fan unit track 3 Track 1 of the power supply fuse board

Repair if necessary.

Check fuse F1 of the power supply fuse board.

Replace it if necessary.

If the fault is still present, contact the Techline.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-50

UPC

Vdiag No.: 44

Type N3 Protection and Switching Unit

AC010

(continued 2)

Check the condition and connection of the fan unit connector.

Repair if necessary.

Make sure that he fan unit is properly earthed.

Check for the presence of +12 V on the fan unit connector while it is being controlled by command AC010.

If correct, replace the fan unit.

If not correct, ensure the insulation against earth and continuity of the connections:

Protection and Switching Unit connector P1 Fan unitRepair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-51

UPC

Vdiag No.: 44

Rear screen

AC011HEATED REAR SCREEN

NOTES

Ignition on

Check:

– the condition and connections of fuses 6 and W located in the passenger

compartment.

Replace if necessary.

Check the condition and the connection of connector PPH1 of the Protection and Switching Unit.Repair if necessary.

Check the condition and connection of the rear screen connectors.

Repair if necessary.

Check that the resistance of the rear screen window is between 0.5 ΩΩΩΩ and 1 ΩΩΩΩ.

Replace the rear screen if necessary.

Check that the rear screen de-icer is earthed.

Check for the presence of +12 V on the rear screen terminal while it is being controlled by command AC011.

If not correct, ensure the insulation against earth and continuity of the connection:Protection and Switching Unit connector PPH1 track 2 Rear screen

Repair if necessary.

If the fault is still present, contact the Techline.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-52

UPC

Vdiag No.: 44

Door mirrors (if equipped with de-icers)

AC011

(continued)

Check the condition and the connection of connector PPH1 of the Protection and Switching Unit.

Repair if necessary.

Check the condition and connection of the door mirror connectors.

Repair if necessary.

Check for the presence of earth on track 5 of the door mirror connector.

Check for the presence of +12 V on track 1 of the door mirror connector while the command is running.If not correct, ensure the insulation against earth and continuity of the connection:

Protection and Switching Unit connector PPH1 track 2 Track 1 of the door mirror via the

fuse box and the passenger

compartment relay

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Interpretation of controls 87G

87G-53

UPC

Vdiag No.: 44

AC012WINDSCREEN WIPER PARK POSITION TEST

NOTES

Commands AC005 Low speed windscreen wiper and AC006 High speed

windscreen wiper must be running to activate this control.

Otherwise, consult the interpretation of these commands.

Apply this procedure if the windscreen wipers do not stop in their initial position.

Check the condition and the connection of connector PEH of the Protection and Switching Unit.

Repair if necessary.

Check the condition and connection of the windscreen wiper motor connector.Repair if necessary.

Ensure the continuity and insulation of the connection between:

Protection and Switching Unit connector PEH track 6 Track 2 of the wiper motor

Repair if necessary.

Using a warning light bulb placed between track 2 of the windscreen wiper motor and the + battery supply,

check that the bulb lights up briefly at the end of the wipe cycle.

If not correct, replace the wiper motor.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Customer complaints 87G

87G-54

UPC

Vdiag No.: 44

Fault finding - Customer complaints

NOTES Carry out a fault finding procedure on the multiplex network.

Run fault finding on the Protection and Switching Unit.

RECORDED FAULTS

NO DIALOGUE WITH THE COMPUTER ALP 1

THE STARTER DOES NOT WORK ALP 2

NO LIGHTING OF VARIOUS FUNCTIONS IN THE PASSENGER

COMPARTMENT ALP 3

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Fault Finding Chart 87G

87G-55

UPC

Vdiag No.: 44

Fault finding - Fault Finding Chart

ALP 1 No dialogue with the computer

NOTES Test the multiplex network.

Check the voltage of the battery.

Check the condition and connection of the battery terminals and power fuses.

Repair if necessary.

Check for the presence of earth on track 3 of connector PPH2.

If necessary, repair the defective connection and/or connector.

Check for the presence of +12 V battery on the connector P2.

If necessary, repair the defective connection and/or connector.

Check the condition and connection of connector PEH.

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Fault Finding Chart 87G

87G-56

UPC

Vdiag No.: 44

ALP 2 The starter does not work

NOTES

Check for any faults in the multiplex network by running the network test.

Refer to the Starting function to check that the starting conditions are met.

Check that status ET010: Starting conditions met is YES after the Start button is

pressed, if not, refer to the information on how to deal with this status.

Check:

– the condition and connection of fuse 3.

Replace it if necessary.

Check the wiring of the starter motor (tightness of the terminals, continuity).

Check the condition and connections of the starter power fuse.

Replace it if necessary.

Check the condition and connection of connector PPM1 of the Protection and Switching Unit and the control

terminal on the starter motor.

Repair if necessary.

If everything is correct, with the starter turning, check for the presence of +12 V on the starter command

terminal.

If correct, carry out a fault finding procedure on the starter.

Check the insulation against earth and continuity of the following connection:

Protection and Switching Unit connector PPM1 track 3 The control terminal on the starter

motor.

Repair if necessary.

If the fault is still present, contact the Techline.

AFTER REPAIR Deal with any other possible faults.Switch off the ignition and carry out a road test followed by a test with the diagnostic

tool.

UPC84 2.0

Edition 5

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ENGINE COMPARTMENT CONNECTION UNIT

Fault finding - Fault Finding Chart 87GUPC

Vdiag No.: 44

ALP 3 No lighting of various functions in the passenger compartment

NOTES The side lights must not be faulty, if they are, refer to the interpretation of command

AC003 Side lights.

Check the condition and connection of the faulty function(s).

Repair if necessary.

Check for the presence of earth on the defective function(s).

Repair if necessary.

With the side lights on, check for the presence of +12 V on the defective function(s).If correct, replace the defective component.

Ensure insulation and continuity against earth between the defective function and the Protection and

Switching Unit:

Cigarette lighter, air conditioning control panel, radio,

multifunction display, door mirror controls, front and

rear window riser controls and lock, door lock switch,

instrument panel dimmer control and on-site headlight

adjustment.

Track 6 connector PPH2 of the

Protection and Switching Unit

Heated seat switches, hard roof switch, LPG or petrol

fuel selection switch, electronic stability program

switch, simultaneous window control, automatic

transmission display and cruise control/speed limiter

controls.

Track 7 connector PPH2 of the

Protection and Switching Unit

Repair if necessary.

If the fault is still present, contact the Techline.