Electronic Power Steering System How To Proceed With Troubleshooting

Steering. Lexus Is250, Is220D. Gse20 Ale20
Power Steering. Lexus Is250, Is220D. Gse20 Ale20

  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. CIRCUIT INSPECTION

  9. IDENTIFICATION OF PROBLEM

  10. REPAIR OR REPLACE

  11. 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 for 4GR-FSE LHD, Click here for 4GR-FSE RHD, Click here for 2AD-FHV LHD, Click here for 2AD-FHV RHD).
            3. If communication to the power steering ECU assembly is not established through the intelligent tester, inspect terminals CANH and CANL 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.CIRCUIT INSPECTION

              NEXT


              9.IDENTIFICATION OF PROBLEM

                NEXT


                10.REPAIR OR REPLACE

                  NEXT


                  11.CONFIRMATION TEST

                    NEXT

                    END