Signal Too Low. Intermittent Fault

Signal too low. Intermittent fault

Checking the control module for open-circuits
Remove relay 2/120.
Check the driver circuit for the relay coil for an open-circuit as follows:
Measure the voltage between the points #1 and #2 in the relay socket. For more information about open circuits, see: Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Activate the relay with the switch child safety lock, for windows rear doors, on the driver's control panel (activated relay LED on).

Hint: Voltage between #1 and #2 shall be battery voltage.

If the value deviates significantly, check voltage between #2 and battery voltage as well as between #1 and ground. Both shall be equal to battery voltage. Check for open circuits according to: Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Do not forget to check that the power supply to the control module is OK.

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










Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - Fault Found

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Attempt New Test - Checking the control module for open-circuits

FAULT FOUND - DONE

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