Signal Missing

Signal missing

Checking the wiring

Hint: The light ring for the ignition switch is deactivated 30 minutes after the vehicle is unlocked.




- Ignition off.
Check the ground lead. Check for an open-circuit. Check for a short-circuit to supply voltage.
Take readings between light ring terminal #6 and ground.
Replace the antenna/light ring if there is no fault in the signal cable.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal specification Signal Specification
- Location of components Locations
- Antenna unit immobilizer, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals

Continue - Verification

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Verification




Verification

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




- Ignition off
- Reinstall the connectors, components etc.
- Activate the interior lighting
- Unlock the car.

Does the light ring come on?

Yes - Verification completed

No - Fault-tracing information

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Fault-tracing 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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the wiring

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