Signal Circuit Inspection

Check for Open in Harness

1. Ignition "OFF".
2. Disconnect HO2S connector and PCM connector.
3. Measure resistance between terminal "1" of the HO2S harness connector and "C1" of the PCM harness connector.
   1. Specification: Approx. 0Ω
      Fig 1: Measuring Resistance Between Terminal 1 Of HO2S And C1 Of PCM Harness Connector

      
4. Is the resistance within specifications?

   YES

   1. Go to "GROUND CIRCUIT INSPECTION " procedure.

   NO

   1. Check for open in Signal harness. Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.