Faulty Signal

Faulty signal

Checking function TMC/FM receiver




- Ignition on.
- Use System test function to test if the TMC/FM receiver is OK. For more information about the System test, see System Test System Test. The test can take up to approximately 6 seconds at longest.
Check if the TMC/FM receiver is OK.

Note! The TMC receiver is for Europe, the FM receiver for Japan.





Is the TMC/FM receiver OK?

Yes - Intermittent fault

No - Checking for contact resistance and oxidation

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Checking for contact resistance and oxidation




Check the control module and TMC/FM receiver connectors for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Ignition on.
Use System test function to test if the TMC/FM receiver is OK. For more information about the System test, see System Test System Test. The test can take up to approximately 6 seconds at longest.

Other information:
- To access/replace the control module, see Replacing the control module, old system Replacing the Control Module, Old System.
- To access/replace the TMC receiver, see Replacing TMC receiver Replacing TMC Receiver.
- To access/replace the FM receiver, see Replacing the FM receiver Replacing the FM Receiver.
Check if the TMC/FM receiver is OK.
If the FM receiver is now OK, the fault was due to a bad connection in the connectors.





Is the TMC/FM receiver OK?

Yes - FAULT FOUND

No - Checking cables and components

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Checking cables and components
Check signal cables between the control module #B5, #B6 and #B14 and TMC/FM receiver terminals 8, 9 and 10 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check signal cable between the control module #B7 and TMC/FM receiver terminal 2 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check signal cable between the control module #B16 and TMC/FM receiver terminal 3 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

Other information:
- To access/replace the control module, see Replacing the control module, old system Replacing the Control Module, Old System.
- To access/replace the TMC receiver, see Replacing TMC receiver Replacing TMC Receiver.
- To access/replace the FM receiver, see Replacing the FM receiver Replacing the FM Receiver.
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box.














Continue - Verification

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Verification

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












- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
- Use System test function to test if the TMC/FM receiver is OK. For more information about the System test, see System Test System Test. The test can take up to approximately 6 seconds at longest.
Check if the TMC/FM receiver is OK.





Is the TMC/FM receiver OK?

Yes - FAULT FOUND

No - Fault-tracing information
No Fault Found

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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 function TMC/FM receiver

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Intermittent fault
Check the control module and TMC/FM receiver connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check signal cable between the control module #B7 and TMC/FM receiver terminal 2 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check signal cable between the control module #B16 and TMC/FM receiver terminal 3 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Remedy as necessary.

Other information:
- To access/replace the control module, see Replacing the control module, old system Replacing the Control Module, Old System.
- To access/replace the TMC receiver, see Replacing TMC receiver Replacing TMC Receiver.
- To access/replace the FM receiver, see Replacing the FM receiver Replacing the FM Receiver.
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box.














Continue - Fault-tracing information
FAULT FOUND

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking function TMC/FM receiver

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