Signal Too High

Signal too high

Checking and replacing the component




- Ignition off
- Replace the relay for heating the leak diagnostic pump
- Ignition on.
Activate the relay. The relay should click.
If the function is OK, the cause of the fault was a defective relay (short-circuit in the relay).

Other information
- To access and replace the relay, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- For further information about the fuses and relays, see the Wiring Diagram.





Was the function OK?

Yes - Fault Found

No - Checking the control module

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Checking the control module




- Ignition off
- Remove the relay
- Ignition on.
Check the relay coil driver circuit for a short-circuit to supply voltage by taking a voltmeter reading at terminal #2 in the relay base.

Hint: The voltage between terminal #2 and ground should be approximately 0 V.








Remedy as necessary.

Other information
- To access and replace the relay, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- For further information about the fuses and relays, see the Wiring Diagram
- 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
- Reinstall the connectors, components etc.
- Ignition on.
Activate and deactivate the relay. The relay must click.





Was the function OK?

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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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking and replacing the component

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