Checking the Control Module Input

Checking The Control Module Input







Unplug the connector:
- Main instrument unit 20-pin connector (540)






















- Connect test lamp 86 11 857 to B+ and pin 8 of the female connector.












- Turn the ignition switch to the ON position.
- Contact Trionic.
Activate: CHECK ENGINE Lamp (ON)







- The test lamp should light.

Checking the wiring harness
Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent breaks and short circuits in the wiring harness. Observe the multimeter, test lamp or diagnostic tool while doing this.

Is the function correct?

NO - Rectifying the Lead

YES - Changing Components