Signal Circuit Inspection

Check for open in harness
1. Ignition "OFF"
2. Disconnect Acceleration sensor connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between terminal 3 of sensor harness connector and chassis ground.
  Specification: approximately 5V
  
  Fig 1: Measuring Voltage Between Terminal 3 Of Sensor Harness Connector And Chassis Ground
  Courtesy of HYUNDAI MOTOR CO.
5. Is measure voltage within Specification?
  YES
  - Go to "Check for short to ground in harness" below.
  NO
  - Open circuit or short circuit to chassis ground between Acceleration sensor harness connector and signal circuit.
  - Open circuit between Acceleration sensor harness connector and PCM harness connector.
  - Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NOTE:
  In case, when acceleration sensor connector is disconnected, the voltage at terminal 3 is 0V.
  - Possible cause-Open or short circuit in harness between terminal 60 of PCM and terminal 3 of acceleration sensor or PCM
Check for short to power in harness
1. Ignition "OFF"
2. Disconnect Acceleration sensor connector and PCM connector.
3. Ignition "ON" & Engine "OFF"
4. Measure resistance between terminal 1 and 3 of sensor harness connector.
  Specification: infinite
  
  Fig 2: Measuring Resistance Between Terminal 1 And 3 Of Sensor Harness Connector
  Courtesy of HYUNDAI MOTOR CO.
5. Is measure resistance within Specification?
  YES
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  NO
  - Short circuit between reference voltage (5V) circuit and signal circuit.
  - Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NOTE: When the terminal 1 and 3 are shorted, the resistance measured is below 1Ω.