Component Inspection
- Replace the HO2S.
- Clear DTC with scantool.
- Start the engine and warm it up until the radiator fan comes on (more than at least 10 minutes).
- Drive at a steady speed between 45-55 mph (72-88 km/h) and then release the accelerator (tip-out).
- Repeat Step 4 to 5 more than 5 times.
- Does the scan tool show DTC?
YES
- Substitute with a known - good PCM and check for proper operation.
- If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Troubleshooting is finished.
NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others