Fault-Tracing

Fault-tracing

Checking the wiring and terminals








- Disconnect any connection from the socket for the tow hitch connector.
- Ignition off.
- Cut off voltage feed to Trailer module (TRM) by removing the battery's minus cable.
- Disconnect the connector for the Trailer module (TRM).
Check the socket for the trailer connector for dirt and damage to connections.
Check connectors for damage to pins and connections.
Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation.
Check the cable for short-circuit to ground.
Take readings between:
- Trailer module (TRM) #C3:12 and the socket for the trailer connector.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting Breakout Box, Trailer Module (TRM)
- Signal specification Signal Specification, Trailer Module (TRM)
- For further information, see the wiring diagram.
- Trailer Module (TRM) Trailer Module (TRM)
- Checking wiring and terminals Checking Wiring and Terminals

Select "Continue" when the fault has been remedied.

Continue - Verification

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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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the wiring and terminals

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Verification




Verification

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




- Reinstall the connectors, components etc.
- If the battery negative lead has been removed:
Connect the battery negative lead.
- Switch on the ignition. Wait 10 seconds.
Read diagnostic trouble codes by clicking the VCT2000 symbol.
If the fault is intermittent, the fault has been remedied.





Is the fault intermittent?

Yes - Troubleshooting procedure complete

No - Fault-tracing information

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