Component Inspection
- Check HO2S(B1/S1) Heater resistance
- IG "OFF" and disconnect HO2S(B1/S1) connector.
- Measure resistance between power and control terminals of HO2S(B1/S1) heater. (Component Side)
Specification: 8.1 ~ 11.1 Ω at 21°C(69.8°F)
- Is the measured resistance within specification?
YES
- Substitute with a known - good ECM and check for proper operation. If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.NOTE: 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 and check for proper operation. If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Substitute with a known - good ECM and check for proper operation. If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.