ELECTRONIC POWER STEERING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Perform troubleshooting in accordance with the following flowchart.

Tech Tips


  • For further details, see the page given.

  • The intelligent tester can be used in steps 3, 4, 7, 10 and 13.


  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT

  2. CUSTOMER PROBLEM ANALYSIS


    NEXT

  3. CHECK DTC AND FREEZE FRAME DATA


    1. Record DTCs and freeze frame data. Click here


      NEXT

  4. CLEAR DTC AND FREEZE FRAME DATA Click here.


    NEXT

  5. PROBLEM SYMPTOM CONFIRMATION


    SYMPTOM DOES NOT OCCUR (GO TO STEP 6)

    SYMPTOM OCCURS (GO TO STEP 7)

  6. SYMPTOM SIMULATION Click here.


    NEXT

  7. CHECK DTC Click here.


    1. Recheck for DTCs.

      Tech Tips


      • Refer to the diagnostic trouble code chart when any DTCs are output.

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


      NORMAL SYSTEM CODE OUTPUT: GO TO STEP 8

      DTC OUTPUT: GO TO STEP 9

  8. PROBLEM SYMPTOMS TABLE Click here.


    NEXT

  9. DTC CHART Click here


    NEXT

  10. CIRCUIT INSPECTION Click here to Click here.


    NEXT

  11. IDENTIFICATION OF PROBLEM


    NEXT

  12. REPAIR OR REPLACE


    NEXT

  13. CONFIRMATION TEST


    NEXT
    END