Signal Circuit Inspection

Check for open in harness
1. Ignition "OFF"
2. Disconnect TPS sensor connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between terminal 1 of sensor harness connector and chassis ground.
  Specification: approximately 5V
  
  Fig 1: Measuring Voltage Between Terminal 1 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 power in harness" below.
  NO
  - Open circuit or short circuit to chassis ground between TPS harness connector and signal circuit.
  - Open circuit between TPS harness connector and PCM harness connector.
  - Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    NOTE:
    In case, when the TPS connector is disconnected, the voltage of TPS terminal 1 is 0 V.
    
    Possible cause: Open or short between terminal 16 of PCM and Terminal 1 of TPS
Check for short to power in harness
1. Ignition "OFF"
2. Disconnect TPS 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 terminal 1 and 2 of TPS is shorted, the resistance goes below 1Ω.