Component Inspection

Component Inspection

1. Check HO2S (B1/S1) Heater resistance
(1) IG "OFF" and disconnect HO2S (B1/S1) connector
(2) Measure resistance between terminal 1 and 2 of HO2S (B1/S1) (Component Side)
A. Specification : 8.1-11.1 Ohms at 21 °C (69.8 °F)




(3) Is the measured resistance within specification?
YES
- Substitute with a known-good ECM and check for proper operation. If the problem is corrected, replace ECM 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 ECM. Before or after testing ECM on the vehicle, use this function to reuse the ECM on the others

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.