Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking and replacing the component
Remove relay 2/118. Check the relay base switches for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Install the relay.
Activate the relay using the control panel on the left rear door, window down.
If the function is now OK the fault was caused by a contact fault in the relay base.

Other information
- Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing









Was the function OK?

Yes - Verification

No - Replacing the component

-------------------------------------------------

Replacing the component
Replace the relay, 2/118.
Activate the relay using the control panel on the left rear door, window down.
If the function is OK the cause of the fault was a defective relay (short-circuit or open-circuit in the relay).

Other information
- Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing





Was the function OK?

Yes - Fault Found

No - Fault-tracing information

-------------------------------------------------

Verification




Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Connect connectors, install components etc.
- Ignition on.
Activate relay with the control panel on LH rear door, window down.

Does it work?

Yes - VERIFIED

No - VERIFICATION FAILED

------------------------

VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

-------------------------------------------------

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 - FAULT-TRACING FAILED

No - Attempt New Test

------------------------

Attempt New Test - Checking and replacing the component

FAULT-TRACING FAILED - FAULT-TRACING FAILED

-------------------------------------------------