Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Has a problem been found?
![]() | ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
![]() | ▶ Go to "Signal Circuit Inspection" procedure. |
Ignition "OFF".
Disconnect Battery (-) terminal.
Refer to "Shop Manual" 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. 27 (Wheel Sensor Output) terminal of ESC(ESP) Module harness connector.
Specification : Approx. below 1 Ω
Is the measured value within specification?
![]() | ▶ Check for Wheel Speed Sensor related failure in ESC(ESP) 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 GDS. (Refer to "Immobilizer" in BE group) 2) After finishing "PCM Neutral mode", perform "Key teaching" procedure with GDS. (Refer to "Immobilizer" in BE group) [In the case of installing new PCM] Perform "Key teaching" procedure with GDS. (Refer to "Immobilizer" in BE group) 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 GDS. (Refer to "Smart key" in BE group) 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] PInsert 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. |
![]() | ▶ Repair open or short in signal circuit, and then go to "Verification of Vehicle Repair" procedure. |