3416A.pdf

N.T. 3416A

XXXX

FAULT FINDING

ABS - traction control

4x4

COMPUTER TYPE: 240.5

77 11 296 442

MAY 2000

EDITION ANGLAISE

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

technical specifications current when it was prepared.

All copyrights reserved by Renault.

Reproduction or translation, 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.

The methods 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".

Contents

Page

ELECTRONICALLY CONTROLLED

HYDRAULIC SYSTEM

Introduction

38-1

Fault interpretation

38-2

Interpretation of states

38-31

Conformity check

38-33

Help

38-35

Customer complaints

38-37

Fault finding chart

38-38

138

ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM

Fault finding - Introduction

ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM

Fault finding - Introduction

This document introduces the fault finding strategy applicable on all the computers in the ABS/traction

control of the Scénic 4x4 (computer identification: PR012 = 240.5).

The following are thus required to carry out fault finding on this system:

– This "Special features of fault finding" Technical Note,

– the wiring diagram for the operation of the vehicle concerned,

– the tools listed under the heading "Special tooling required".

GENERAL FAULT FINDING PROCEDURE:

Use of one of the fault finding tools to identify the system fitted in the vehicle (reading the computer family, the

program no., the vdiag, ...).

Search for "fault finding" documents relating to the system identified.

Consider the information supplied in the preliminary sections.

Read the faults recorded in the computer memory and use the "fault interpretation" section of the documents.

Reminder : Each fault is interpreted for a particular type of fault storage (fault present, fault stored, fault present or

stored). The tests defined for dealing with each fault should therefore only be applied to the vehicle if the fault

detected by the fault finding tool is interpreted in the document for its type of storage. The type of storage should

be considered when the fault finding tool is used after the ignition has been switched off and on again.

If a fault is interpreted when it is "stored", the conditions for application of the fault finding strategy are listed in the

"Notes" box. If these conditions are not met, use the fault finding strategy to check the circuit of the faulty

component because the fault is no longer present on the vehicle. Use the same procedure if a fault is shown as

stored by the fault finding tool and is only interpreted in the documentation for a "present" fault.

● Carry out the conformity check (show possible malfunctions not yet detected by the system self diagnosis

procedure) and apply the associated fault finding strategy according to the results.

● Validation of the repair (disappearance of the customer complaint).

● Use of the fault finding strategy for the "customer complaint" if the problem persists.

TOOLS REQUIRED FOR WORK ON THE ABS SYSTEM:

– Fault finding tools (except XR25).

– Multimeter.

Reminders

When an intermittent fault is stored, the ABS warning light will illuminate the next time the vehicle is used until the

car reaches 7.5mph (12 km/h). When the fault is stored, a counter linked to the fault is initialised with a value of 40 .

This counter value will be decremented each time the ignition is switched on if the fault is not present when the

vehicle speed exceeds 7.5 mph (12 km/h).

When the counter value is equal to 1 , it is not decremented any further and the fault is not erased.

When the dialogue is established between the diagnostic tool and the ABS computer, the ABS and EBD (Electronic

Brakeforce Distribution) functions are interrupted, which gives rise to a risk of loss of control of the vehicle under

emergency braking. For this reason, the dialogue is cut as soon as the vehicle speed exceeds 6 mph (10 km/h) to

reestablish ABS and EBD function.

ABSABD64 1.0

38-1

ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM

Fault finding - Fault Interpretation

DF002

PRESENT

STORED

Front left solenoid inlet valve circuit

Conditions for the application of the fault finding strategy to the fault stored :

The fault is registered as present following: brake pedal held down + "solenoid valve

front left wheel" actuator control

NOTES

Check the condition and position of the 60A ABS fuse in the engine connection unit.

Ensure continuity between the fuse and tracks 17 and 18 of the computer connector (presence of +before

ignition on both tracks). Check that the battery terminals are securely connected and in good condition.

Check the connections on the 31-track computer connector .

Check the ABS earths (above the ABS unit) and inspect visually all the ABS wiring.

Erase the computer memory, exit the fault finding procedure and switch off the ignition.

Perform a new test with the fault finding tool using the "Front left wheel solenoid valves" actuator control. If the

"Front left solenoid inlet valve circuit" fault reappears, replace the ABS computer (consult the "Help" section

for this operation).

Clear the computer memory.

Perform a road test then a new test with the fault finding tool.

AFTER REPAIR

ABSABD64 1.0

38-2

ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM

Fault finding - Fault Interpretation

DF003

PRESENT

STORED

Rear left solenoid inlet valve circuit

Conditions for the application of the fault finding strategy to the fault stored. :

The fault is registered as present following: brake pedal held down + "solenoid valve

rear left wheel" actuator control

NOTES

Check the condition and position of the 60A ABS fuse in the engine connection unit.

Ensure continuity between the fuse and tracks 17 and 18 of the computer connector (presence of +before

ignition on both tracks). Check that the battery terminals are securely connected and in good condition.

Check the connections on the 31-way computer connector .

Check the ABS earths (above the ABS unit) and inspect visually all the ABS wiring.

Erase the computer memory, exit the fault finding procedure and switch off the ignition.

Perform a new test with the fault finding tool using the "Rear left wheel solenoid valves" actuator control. If the

"Rear left solenoid inlet valve circuit" fault reappears, replace the ABS computer (consult the "Help" section for

this operation).

Clear the computer memory.

Perform a road test then a new test with the fault finding tool.

AFTER REPAIR

ABSABD64 1.0

38-3

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