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Home >> Kia >> 2018 >> Optima S >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 2.4L (2 Of 3) (Except HEV) >> DTC P050A-00: Cold Start Idle Air Control System Performance >> Wiring Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

  1. Ignition "OFF".
  2. Refer to ETC (ELECTRONIC THROTTLE CONTROL) SYSTEM and disconnect Throttle Body connector.
  3. Ignition "ON".
  4. Measure voltage between Pin No. 4 (TPS1 Signal) terminal of Throttle Body harness connector and chassis ground.

    Specification:  Approx. 4 V

  5. Measure voltage between Pin No. 5 (TPS2 Signal) terminal of Throttle Body harness connector and chassis ground.

    Specification:  Approx. 0 V

  6. Ignition "OFF".
  7. Disconnect Battery (-) terminal.
  8. Refer to ENGINE CONTROL MODULE (ECM) and disconnect ECM/PCM connector.
  9. Measure resistance between Pin No. 4 (TPS1 Signal) terminal of Throttle Body harness connector and Pin No. 100 (TPS1 Signal) terminal of PCM harness connector.
  10. Measure resistance between Pin No. 5 (TPS2 Signal) terminal of Throttle Body harness connector and Pin No. 80 (TPS2 Signal) terminal of PCM harness connector.

    Specification:  Approx. below 1 Ω

  11. Is the measured value within specification?

    YES 

    NO 

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