Faulty Signal

Faulty signal

Checking components

Caution! Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the rear heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation.
Try a new heated oxygen sensor (HO2S) if the above fault-tracing does not remedy the fault.
Remedy as necessary.

Other information
- Signal specification Signal Specification, Engine Control Module (ECM)
- Checking wiring and terminals Checking Wiring And Terminals













Continue - Verification

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Verification




Verification

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








- Test drive the car and ensure that there is a fuel shut-off. The easiest way to do this is to drive at approximately 80 km/h and abruptly release the accelerator pedal (AP) for at least 5 seconds
- Connect VCT2000 to the data link connector (DLC) without switching off the engine.

Note! If the engine is switched off, the stored fault status will be erased and the test drive will have to be repeated.

Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC).
Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".





Is the fault status "No fault detected"?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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Fault-tracing information

FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking components

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