Component Inspection

Component Inspection

1. Check HO2S (B1/S1)
(1) IG "OFF" and disconnect HO2S (B1/S1) connector.
(2) Check HO2S (B1/S1) for damage or contamination caused by a foreign substance.
(3) Is the HO2S (B1/S1) normal?
YES
- Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.
NO
- Substitute with a known - good HO2S (B1/S1) and check for proper operation. If the problem is corrected, replace HO2S (B1/S1) and go to "Verification of Vehicle Repair" procedure

CAUTION:
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.