POWER STEERING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips

Perform troubleshooting in accordance with the following flowchart.

*: 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*


    NEXT

  4. PROBLEM SYMPTOM CONFIRMATION


    NEXT

  5. CHECK CAN COMMUNICATION SYSTEM*


    1. Check for DTCs 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 SIL of the DLC3 and the power steering ECU, and the IG circuit of the power steering ECU.


      B

      GO TO CAN COMMUNICATION SYSTEM Click here

      A

  6. CHECK DTC*


    1. Check for DTCs 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. 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. TERMINALS OF ECU Click here.

    2. DATA LIST / ACTIVE TEST Click here.


      NEXT

  9. REPAIR OR REPLACE


    NEXT

  10. CONFIRMATION TEST


    NEXT
    END