Control Circuit Inspection

Check for open in control harness.
1. Ignition "OFF".
2. Disconnect PCM connector.
3. Measure resistance between terminals 6 of the HO2S heater harness connector and 93 of the PCM harness connector
  Specification : Approx 0Ω
4. Is resistance within the specification?
YES
- Go to next step as below
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for short to ground in control circuit.
1. Measure resistance between terminal 6 of the HO2S heater harness connector and chassis ground.
  Specification : infinite
2. Is resistance within the specification?
YES
- Go to next step as below
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for short to power in control circuit.
1. Reconnect the PCM connector.
2. Ignition "ON" and Engine "OFF"
3. Measure voltage between terminal 6 of the HO2S heater harness connector and chassis ground
  Specification : Approx 0Ω
4. Is voltage within the specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Repair open or short to ground in control circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure