POWER STEERING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips

*: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS


    1. Confirm problem symptoms Click here.


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  3. INSPECT BATTERY VOLTAGE*


    1. Measure the voltage of the battery.

      Standard voltage
      11 to 14 V

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

    2. Using the intelligent tester, inspect battery voltage reduction history "Battery Voltage Lo Record" in the Data List Click here.


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  4. CHECK DTC AND FREEZE FRAME DATA*


    1. Check and record DTCs and freeze frame data.


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  5. CLEAR DTC AND FREEZE FRAME DATA*


    1. Clear the DTCs and freeze frame data.


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  6. PROBLEM SYMPTOM CONFIRMATION

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

    B
    A
  7. SYMPTOM SIMULATION


    1. Perform symptom simulation Click here.


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  8. 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 for the CAN communication system first.

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


      B
      A
  9. 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
  10. PROBLEM SYMPTOMS TABLE


    1. Refer to Problem Symptoms Table Click here.


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  11. CIRCUIT INSPECTION


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  12. IDENTIFICATION OF PROBLEM


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  13. REPAIR OR REPLACE


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  14. CONFIRMATION TEST


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