Component Inspection

Component Inspection

1. Check HO2S (B2/S1) Heater resistance
(1) IG "OFF" and disconnect HO2S (B2/S1) connector
(2) Measure resistance between terminal 3 and 4 of HO2S (B2/S1) connector (Component Side)
A. Specification : 3.0 - 4.0 Ohms at 21°C (69.8°F)




(3) Is the measured resistance within specification ?
YES
- Substitute with a known - good PCM and check for proper operation.
If the problem is corrected, go to "Verification of Vehicle Repair" procedure.

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.

NO
- Substitute with a known - good HO2S (B2/S1) and check for proper operation.
If the problem is corrected, go to "Verification of Vehicle Repair" procedure.