POWER STEERING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the power steering system.

  • *: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT

  2. INSPECT BATTERY VOLTAGE

    Standard Voltage
    11 to 14 V

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


    NEXT

  3. CHECK DTC AND FREEZE FRAME DATA*


    1. Refer to DTC Check/Clear Click here.


      NEXT

  4. PROBLEM SYMPTOM CONFIRMATION


    NEXT

  5. CHECK CAN COMMUNICATION SYSTEM*


    1. Refer to DTC output for the CAN communication system Click here.

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

      Tech Tips


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

      • When communication to the power steering ECU is not established through the intelligent tester, inspect terminals CANH and CANL of the DLC3 and the power steering ECU, and the IG circuit of the power steering ECU.


      B

      PROCEED TO CAN COMMUNICATION SYSTEM Click here

      A

  6. CHECK DTC*


    1. Refer to DTC Check/Clear Click here.

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

      B

      Go to step 9
      A

  7. 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

      Go to step 9
      A

  8. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Refer to Terminals of ECU Click here.

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


      NEXT

  9. REPAIR OR REPLACE


    NEXT

  10. CONFIRMATION TEST


    NEXT
    END