Fault-Tracing

Fault-tracing

Checking the status




- Start the engine and let it idle for approx. 3-5 minutes to perform the diagnosis.
Check if the malfunction is permanent or intermittent by reading off the diagnostic trouble code's status when the diagnostic status is "Implemented".
If the trouble status is "Malfunction found", this indicates that the malfunction is permanent. If the trouble status is "No malfunction found", this indicates that the malfunction is intermittent.









Continue - Checking components

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Checking components

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

Check the cable between the Engine Control Module (ECM) terminal #A41 (#A41) and heated oxygen sensor terminal #4 (bank 1). Check for a short-circuit to supply voltage.
If the above troubleshooting does not solve the problem, try a new heated oxygen sensor.
Remedy as necessary.

Other information
- Connecting the breakout box, B6304T2 Connecting the Breakout Box
- Signal specification, B6304T2 Signal Description, Engine Control Module (ECM)
- Oxygen sensor (Catalyst monitor sensor), B6304T2 Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals













Continue - Verification

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Troubleshooting 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 components

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Verification




Verification

Hint: After repairing, it is necessary to check that the malfunction has been fixed.








- Ignition off
- Reinstall the connectors, components etc.
- Start the engine to perform the diagnosis.
Read off the diagnostic status and trouble status for the diagnostic trouble code.
Check that the diagnosis is "Implemented" and that the trouble status is "No malfunction found". If the trouble status is "Malfunction found", this indicates defective function.





Trouble status shows "No malfunction found"?

Yes - Troubleshooting procedure complete

No - Troubleshooting information

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