Signal Circuit Inspection

Check for short to ground in signal circuit
1. Measure resistance between terminal 1 of sensor harness connector and chassis ground
  Specification: Infinite
  
  Fig 1: Measuring Resistance Between Terminal 1 Of Sensor Harness Connector And Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
2. Is resistance within the specification?
  YES
  - Go to 2
  NO
  - Check signal circuit for short to ground. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for short to power in signal circuit
1. Disconnect ECM connector
2. Ignition "ON" & Engine "OFF"
3. Measure voltage between terminals 2 of sensor harness connector and chassis ground
  Specification: Approx. 0V
  
  Fig 2: Measuring Voltage Between Terminals 2 Of Sensor Harness Connector And Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
4. Is voltage within the specification?
  YES
  - Go to 3
  NO
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for open in signal harness
1. Ignition "OFF"
2. Measure resistance between terminals 1 of sensor harness connector and 22 of the ECM harness connector
  Specification: Approx. 0Ω
  
  Fig 3: Measuring Resistance Between Terminals 1 Of Sensor Harness Connector And 22 Of ECM Harness Connector
  Courtesy of HYUNDAI MOTOR CO.
3. Is resistance within the specification?
  YES
  - Go to TERMINAL AND CONNECTOR INSPECTION
  NO
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.