Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking the cables and components

Hint: The phone module is connected to the GPS antenna via a connector on the right A-pillar.




- Ignition off.
Check the antenna cable between the phone module (PHM) connector G (grey) and connector E (connector 1) on the right A-pillar for a short circuit to ground as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Test connector G between:
- A (antenna signal) and B (mudguard ground)
- A (antenna signal) and body ground
If no fault is found on the antenna cable, test again after replacing antenna as described in Antenna carphone, replacing Service and Repair.
Do the necessary corrective action.

Additional information:
- In terms of DC voltage, the GPS antenna has a fixed internal resistance of approximately 60 (.
- Using an ohmmeter, the resistance between the signal wire and mudguard or body ground antenna cable, between the phone module and the right A-pillar connector should be infinite.
- To access/replace phone antenna, see Antenna carphone, replacing Service and Repair.
- To access/replace the phone module (PHM), see Phone module (PHM), replacing Service and Repair.
- For information on signals and connectors, see Signal description. Phone module (PHM) Signal Description, Phone Module (PHM).













Select Continue when fault has been rectified.

Continue - Verification

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Verification




Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Connect connector, install components etc.
- Ignition on.
- Turn on the phone.
- Wait approximately 20 seconds.
Click on the VCT 2000 symbol to read the diagnostic trouble codes.
Check that the status of the current diagnostic trouble code has changed from permanent to intermittent fault.





Did the status of the diagnostic trouble code change?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Trouble-shooting information

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Trouble-shooting 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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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the cables and components

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