Signal Circuit Inspection

Ignition "OFF".
Disconnect Battery (-) terminal.
Refer to ENGINE CONTROL MODULE (ECM) and ELECTRONIC STABILITY CONTROL (ESC) SYSTEM (PHEV) and disconnect PCM and ESC (ESP) Module connector.
Measure resistance between Pin No. 78 (Vehicle Speed Input) terminal of PCM harness connector and Pin No. 40 (Wheel Sensor Output) terminal of IBAU Module harness connector.
Specification : Approx. below 1Ω
Is the measured value within specification?
YES
- Check for Wheel Speed Sensor related failure in IBAU system, and then perform applicable troubleshooting.
- Once Wheel Speed Sensor related failure is fixed, re-do troubleshooting guide steps carefully.
- If the diagnostics have been performed correctly with no failure found, replace the PCM and then go to "Verification of Vehicle Repair " procedure.
  CAUTION:
  When replacing the PCM, the vehicle equipped with the immobilizer must be performed procedure as below. [In the case of installing used PCM]
  1. Perform "PCM Neutral mode" procedure with KDS/GDS. (Refer to "IMMOBILIZER ")
  2. After finishing "PCM Neutral mode", perform "Key teaching" procedure with KDS/GDS. (Refer to "IMMOBILIZER ")
  [In the case of installing new PCM]
  Perform "Key teaching" procedure with KDS/GDS. (Refer to "IMMOBILIZER ")
  CAUTION:
  When replacing the PCM, the vehicle equipped with the smart key system (Button start) must be performed procedure as below.
  [In the case of installing used PCM]
  1. Perform "PCM Neutral mode" procedure with KDS/GDS. (Refer to "SMART KEY ")
  2. After finishing "PCM Neutral mode", insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the PCM learns the smart key information automatically.
  [In the case of installing new PCM]
  Insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the PCM learns the smart key information automatically.
NO
- Repair open or short in signal circuit, and then go to "Verification of Vehicle Repair " procedure.