Fault-Tracing Information

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, B6304T4 Breakout Box Connection, Engine Control Module (ECM)
- Signal specification, B6304T4 Signal Description, Engine Control Module (ECM)
- Oxygen sensor (Catalyst monitor sensor), B6304T4 Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals













Continue - Verification

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Troubleshooting information

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 - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Troubleshooting information

VERIFIED - FAULT FOUND

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