Component Inspection

Component Inspection

1. Replace the HO2S.
2. Clear DTC with scantool.
3. Start the engine and warm it up until the radiator fan comes on (more than 10 min).
4. Drive at a steady speed between 45-55 mph (72-88 km/h) for 30 seconds.
5. Stop and then maintain idle state for 30 seconds in D-position.
6. Check if O2 sensor monitoring readiness is complete.
7. Does the scan tool show DTC P0139?
YES
1) Substitute with a known - good PCM and check for proper operation.
If the problem is corrected, go to "Verification of Vehicle Repair" procedure.
NO
1) Troubleshooting is finished.

CAUTION:
There is a memory reset function on scantool that can erase optional components automatically detected and memorized by PCM.Before or after testing PCM on the vehicle, use this function to reuse the PCM.