Electronic Power Steering System How To Proceed With Troubleshooting

Steering. Lexus Gs430, Gs300. Uzs190 Grs190
Power Steering. Lexus Gs430, Gs300. Uzs190 Grs190

  1. VEHICLE BROUGHT TO WORKSHOP

  2. CHECK DTC AND FREEZE FRAME DATA

  3. CLEAR DTC AND FREEZE FRAME DATA

  4. PROBLEM SYMPTOM CONFIRMATION

  5. SYMPTOM SIMULATION

  6. CHECK DTC

  7. PROBLEM SYMPTOMS TABLE

  8. DTC CHART

  9. CIRCUIT INSPECTION

  10. IDENTIFICATION OF PROBLEM

  11. REPAIR OR REPLACE

  12. CONFIRMATION TEST

Electronic Power Steering System -- How To Proceed With Troubleshooting


Perform troubleshooting according to the following flowchart.
HINT:
  1. For further details, see the page given.
  2. The intelligent tester can be used at steps 2, 3, 6, 9 and 12.


1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.CHECK DTC AND FREEZE FRAME DATA

    1. Record DTCs and freeze frame data.


    NEXT


    3.CLEAR DTC AND FREEZE FRAME DATA

      NEXT


      4.PROBLEM SYMPTOM CONFIRMATION


        		.
        SYMPTOM DOES NOT OCCUR (GO TO STEP 5)

        		.
        SYMPTOM OCCURS (GO TO STEP 6)

        5.SYMPTOM SIMULATION

          NEXT


          6.CHECK DTC

          1. Recheck for DTCs.

            HINT:
            1. Refer to the diagnostic trouble code chart if any DTCs are output.
            2. If any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first (Click here).
            3. If 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 IS OUTPUT: GO TO STEP 7

          		.
          TROUBLE CODE IS OUTPUT: GO TO STEP 8

          7.PROBLEM SYMPTOMS TABLE

            NEXT


            8.DTC CHART

              NEXT


              9.CIRCUIT INSPECTION

                NEXT


                10.IDENTIFICATION OF PROBLEM

                  NEXT


                  11.REPAIR OR REPLACE

                    NEXT


                    12.CONFIRMATION TEST

                      NEXT

                      END