Fault Tracing By Successive Elimination
During fault tracing by successive elimination, try to localize the problem by measuring the power consumption at the same time as removing one fuse at a time in the vehicle.
Procedure
- Expose the fuse boxes in the engine compartment, in the passenger compartment and in the luggage compartment.
- Use the multimeter and check that the relays and fuses have the correct voltage, use the wiring diagram and signal tables as assistance. Measure between fuses and suitable ground terminals. If a fault is detected, fault-trace the relevant system.
- Remove a fuse and read off the standby consumption according to the instructions above. If the power consumption has dropped to less than 25 mA, fault trace the system that the fuse corresponds to. If power consumption has not reduced, repeat the procedure with another fuse.
NOTE:
Remove one fuse at a time and measure. If possible, prevent replacing fuses before the fault is found because there is a risk of the vehicle exiting usage mode abandoned. If the vehicle still exits usage mode abandoned, repeat the preparations for standby measurement before fault tracing with successive elimination being set.
If the fault has not occurred, continue with successive elimination on relays and the connectors for the vehicle's control modules.
Reinstall the connectors, components etc. Do not forget to unlock the trunk lid or tailgate and doors.