Signal Circuit Inspection

Check for short to battery in signal harness
1. Disconnect ECM connector.
2. Ignition "ON" & Engine "OFF"
3. Measure voltage between terminal 1 of the sensor harness connector and chassis ground
  Specification: Approx. 0V
4. Is voltage within the specification?
  YES
  - Go to 2.
  NO
  - Check for short to battery or open in signal harness. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for open in signal harness
1. Ignition "OFF"
2. Measure resistance between terminal 1 of the sensor harness connector and 15 of the ECM harness connector
  Specification: Approx. 0Ω
3. Is resistance within the specification?
  YES
  - Go to TERMINAL AND CONNECTOR INSPECTION
  NO
  - Check for open in signal harness. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.