13B-3V4 MR-372-J84-13B000$010.mif
DIESEL INJECTION
Fault finding – Introduction13B
DDCR INJECTION
Vdiag No.: 44, 48
To cut off + after ignition, proceed as follows:
– disconnect the diagnostic tool,
– press the start button twice briefly (less than 3 seconds),
– check that the + after ignition feed has been cut off by checking that the computer warning lights on the instrument
panel have gone out.
Fault
Faults are declared present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but are not diagnosed within the current context).
The present or stored status of the faults should be taken into consideration when the diagnostic tool is used after
the + after ignition feed has been connected (with no system components 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 paragraph.
If the fault is confirmed when the notes 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).
Or use diagnostics to check the circuit of the suspect component.
Conformity check
The conformity check is designed to check the statuses and parameters that do not display any faults on
the diagnostic tool when inconsistent. Therefore, this stage is used 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 features the fault finding procedures for statuses and parameters, and the conditions for checking
them.
If a status is not operating normally or a parameter is outside permitted tolerance values, you should consult
the corresponding fault finding page.
Customer complaints - Fault-finding chart
If the diagnostic tool check is correct, but the customer complaint is still present, it should be dealt with using
Customer complaints.NOTE:
The right-hand and left-hand xenon bulb computers are powered when the dipped headlights are lit. Fault finding
can only be carried out on them after the ignition has been switched on in fault finding mode (forced + after ignition
feed) and the dipped headlights are on.
A summary of the overall procedure to follow is provided on the following page in the form of a flow chart.
