Signal Missing. Intermittent Fault

Signal missing. Intermittent fault

Checking the connectors
Check connector 54/3 and the connector for the central electronic module (CEM) for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults. Check for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults. Remedy if necessary.
Check for any damage.

Hint: If the fault cause is found, reinstall the components, connectors etc.
If the fault cause is not found, do not reinstall the central electronic module (CEM) before continuing with fault-tracing.

Other information:
- To access the central electronic module (CEM) connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- For the intermediate connector, see the relevant wiring diagram
- To connect the breakout box to the control module, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For further information about signals and other values, see Signal specification Pinout Values and Diagnostic Parameters





Was a fault detected?

Yes - DONE

No - Checking the cable

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Checking the cable
Check the cable between central electronic module connector terminal #20A and the ignition switch connector terminal #50. Check for an open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults. Check for a short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.

Other information
- The voltage must be the same as battery voltage if the key is in position III
- To access or replace the central electronic module (CEM) connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- For the intermediate connectors, see the relevant wiring diagram
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For further information about signals and other values, see Signal specification Pinout Values and Diagnostic Parameters














Continue - DONE

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