Signal Too Low

Signal too low. Permanent fault

Checking the connectors and components








- Check the connector for the door node and door mirror. Check for contact resistance and oxidation.
Remedy as necessary
- Reinstall the connectors, components etc.
- Ignition on.
Test the door mirror function by changing its position and reading off the end values registered by the door mirror potentiometer.

Hint: The end values for the door mirror potentiometer should be between approximately 1 V and 4 V.

Other information:
- To access the door mirror, see Door mirror, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals.









Does the door mirror potentiometer operate correctly?

Yes - Verification

No - Checking a faulty signal

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Checking a faulty signal
Check the cable between the control module #25A and the door mirror potentiometer terminal #1. Check for an open-circuit. Check for a short-circuit to ground.

DDM/PDM-0031 Door mirror potentiometer, signal too low
Check the cable between control module #9A and door mirror potentiometer #9. Check for a short-circuit to ground.

DDM/PDM-0033 Door mirror potentiometer, signal too low
Check the cable between control module #10A and door mirror potentiometer #10. Check for a short-circuit to ground.

Other information:
- For further information about signals and other values, see Signal specification Pinout Values and Diagnostic Parameters
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- Checking wiring and terminals Checking Wiring And Terminals.










Continue - Verification

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Verification




Verification

Verification

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








- Ignition off
- Reconnect the components, connectors etc.
- Ignition on.
Check that the limit values for the door mirrors are between 1 and 4 V.





Is the response within its permitted range?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - 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 - FAULT-TRACING FAILED

No - Attempt New Test

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Attempt New Test - Checking the connectors and components

FAULT-TRACING FAILED - No Fault Found

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