Charging Lamp Not Working

Charging Lamp Not Working

Fault symptoms
Charging lamp not working

Checking the wiring harness
Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic instrument while carrying out this check.

Diagnostic procedure

1. Grounding, charging lamp
^ Unplug connector D+ on the generator: (2)





^ Connect a jumper lead to a good grounding point.





^ Turn the ignition switch to ON.





^ The charging lamp should light up.





Is the function correct?
YES
^ Repair or replace terminal D+ on the generator
^ Go to step 3
NO
^ Go to step 2

2. Checking the lead
^ Unplug the main instrument unit's 20-pin connector: (540)





^ Connect a test lamp to B+ and pin 3 of MIU K20.





^ Turn the ignition switch to ON.





^ Connect a jumper lead between terminal D+ and a good ground.





^ Turn the ignition switch to ON





^ The test lamp should light up.





Is the function correct?
YES
^ Replace: Charging lamp.
^ Go to step 3.
NO
^ Repair or replace the lead.
^ Go to step 3.

3. Final check
^ Clear diagnostic trouble codes in all systems.





^ Carry out a function check.





Is the function correct?
YES
^ The steps taken to rectify the fault were correct.
NO
^ See Fault diagnosis, general, "Before changing a control module." Before Changing A Control Module