Signal Circuit Inspection
- Ignition "OFF" & Disconnect HO2S (B1/S2) connector.
- Ignition "ON".
- Measure voltage between Pin No. 1 (Sensor High) terminal of HO2S (B1/S2) harness connector and chassis ground.
Specification: Approx. 0.3V (high)
- Ignition "OFF" & Disconnect ECM connector.
- Measure resistance between Pin No. 1 (Sensor High) terminal of HO2S (B1/S2) harness connector and chassis ground.
Specification: ∞ (infinity)Ω
- Is the measured value within specification?
YES
- Go to "GROUND CIRCUIT INSPECTION " procedure.
NO
- Repair or replace as necessary and then, go to "VERIFICATION OF REPAIR " procedure.