Signal Circuit Inspection

Check for Open in Signal Circuit

1. Measure resistance between terminals 1 of the sensor harness connector and 11 of the ECM harness connector
   1. Specification: Approx. 0Ω
      Fig 1: Measuring Resistance Between Terminals 1 Of Sensor Harness Connector And 11 Of ECM Harness Connector

      
2. Is resistance within the specification?

   YES

   1. Go to next step as below

   NO

   1. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check for Short to Battery in Signal Circuit

1. Ignition "ON" & Engine "OFF"
2. With IATS and ECM connector still disconnected, measure voltage between terminals 1 of sensor harness connector and 11 of the ECM harness connector
   1. Specification: Approx. 0V
      Fig 2: Measuring Voltage Between Terminals 1 Of Sensor Harness Connector And 11 Of ECM Harness Connector

      
3. Is voltage within the specification?

   YES

   1. Go to "TERMINAL AND CONNECTOR INSPECTION " procedure.

   NO

   1. Repair open circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure