Specifications

13B-3

MR-453-X79-13B000$010.mif

DIESEL INJECTION

Fault finding – Introduction

13B

DCM 1.2 injection

Program No.: 4C

Vdiag No.: 08

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

the + after ignition feed has been activated (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 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 faulty component,

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

Conformity check

The aim of the conformity check is to check data that do not produce a fault display on the diagnostic tool when

they are inconsistent. Therefore, this phase makes it possible to:

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

– 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 the statuses and the parameters and the conditions for checking

them.

If a status is not behaving normally or a parameter is outside permitted tolerance values, you should 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 dealt with by

customer complaints.

A synopsis of the general procedure to follow is provided on the following page in the form of a flow chart.