POWER STEERING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the power steering system.

  • *: Use the Techstream.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. INSPECT AUXILIARY BATTERY VOLTAGE

    Standard Voltage
    11 to 14 V

    If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.


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  3. CHECK DTC AND FREEZE FRAME DATA*

    Tech Tips

    Refer to DTC Check / Clear Click here.


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  4. PROBLEM SYMPTOM CONFIRMATION

    Result
    Result Proceed to
    Symptom does not occur. A
    Symptom occurs. B

    B
    A
  5. SYMPTOM SIMULATION


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  6. CHECK CAN COMMUNICATION SYSTEM*


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system DTC is output B

      Tech Tips


      • If any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.

      • If communication to the power steering ECU assembly cannot be established through the Techstream, inspect terminals CANH and CANL of the DLC3 and the power steering ECU assembly, and the IG circuit of the power steering ECU assembly.


      B
      A
  7. CHECK FOR DTC*


    1. Check for DTCs Click here.

      Tech Tips

      Refer to Diagnostic Trouble Code Chart when any DTCs are output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

      B
      A
  8. PROBLEM SYMPTOMS TABLE


    1. Refer to Problem Symptoms Table Click here.

      Result
      Result Proceed to
      Fault is not listed in Problem Symptoms Table A
      Fault is listed in Problem Symptoms Table B

      B
      A
  9. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Refer to Terminals of ECU Click here.

    2. Refer to Data List / Active Test Click here.


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  10. REPAIR OR REPLACE


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  11. CONFIRMATION TEST


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