Faulty Signal or Signal Missing. Intermittent Fault

Faulty signal or signal missing. Intermittent fault

Checking the relay
Check that the relay is securely connected. Check for contact resistance and oxidation. Check for loose connections.
The following applies only in the event of an open-circuit in the cable:

Hint: The fault may have caused by contact resistance, oxidation or loose connections in the supply to the relay. The voltage must be 12 V at both terminals #1 and #5 for relay 2/91. For relay 2/90 the voltage must be 12 V at terminal #1. Check fuse 11B/13 in the integrated relay/fusebox in the engine compartment in particular.

Using the table below, check the cable between the central electronic module (CEM) and the windshield wiper relay. Check for contact resistance and oxidation. Check for loose connections.





Also check the connector. Check for contact resistance and oxidation. Check for loose connections.

Other information:
- For information about the central electronic module (CEM) connector and to replace the relay, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For information about signals, see Signal specification Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals










Continue - DONE

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