Signal Too Low

Signal too low

Checking the wiring and connectors
- Ignition off.
Check the power supply cable. Check for short circuit to ground.

Courtesy lighting left front
Take readings between:
- Central electronic module (CEM) #D1 (#1) and courtesy lighting, left, front, (10/126) #2.

Courtesy lighting right front
Take readings between:
- Central electronic module (CEM) #D2 (#2) and courtesy lighting, right, front, (10/125) #2.

Courtesy lighting left rear (S80 only)
Take readings between:
- Central electronic module (CEM) #D3 (#3) and courtesy lighting, left, rear, (10/122) #2.

Courtesy lighting right rear (S80 only)
Take readings between:
- Central electronic module (CEM) #D4 (#4) and courtesy lighting, right, rear, (10/123) #2.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal specification Pinout Values and Diagnostic Parameters
- Location of components Locations
- Checking wiring and terminals Checking Wiring And Terminals


Continue - Verification

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Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
Check that the courtesy lighting comes on when the doors are opened.

Does the courtesy lighting function?

Yes - Fault Found

No - Information

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Information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the wiring and connectors

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