XENON BULBS
Fault finding - Introduction
80C
80C-2
Program no.: V010
VDIAG No.: 05
3. RECAP
Procedure:
To run fault finding on the vehicle's computers, switch on the ignition in fault finding mode (forced + after ignition
feed).
Proceed as follows:
– vehicle card in card reader (scenario 1: keyless vehicle, entry level model, no hands-free; and scenario 2: top
of the range, hands-free),
–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 + after ignition, proceed as follows:
–disconnect the diagnostic tool,
–Press the Start button twice briefly (less then 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.
Faults
Faults are classed as either present or stored (having appeared in a certain situation and then disappeared, or being
still present but not diagnosed in the current situation).
The present or stored status of faults should be taken into consideration when the diagnostic tool is used after the
+ after ignition feed is switched on (without acting on the system components).
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 section.
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 electric lines on which there is a fault;
– The connectors on those lines (corrosion, bent pins, etc.);
– The resistance of the faulty component;
– The condition of the wires (insulation melted or cut, chafing, etc.).
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 when they are inconsistent. Therefore, this phase is used:
–to perform 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 repairs.
This section features 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 diagnostic tool check is correct, but the customer complaint persists, it should be dealt with according to the
customer complaint.
A summary of the overall procedure to follow is provided on the following page in the form
of a flow chart.
Lampes au Xénon J 84
Edition 4