POWER STEERING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

DTC Code DTC Name
HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

Tech Tips


  • Use these procedures to troubleshoot the power steering system.

  • *: Use the GTS.

PROCEDURE


  1. VEHICLE BROUGHT TO WORKSHOP

    Result
    Proceed to
    NEXT

    NEXT

  2. INSPECT AUXILIARY BATTERY VOLTAGE


    1. Measure the voltage of the auxiliary battery.

      Standard Voltage
      11 to 14 V

      Tech Tips

      If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

    2. Using the GTS, inspect auxiliary battery voltage reduction history "Battery Control Count (Body ECU)" in the Data List.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK DTC AND FREEZE FRAME DATA*

    Tech Tips

    Refer to DTC Check / Clear.

    Click here


    Chassis > EMPS > Trouble Codes
    Result
    Proceed to
    NEXT

    NEXT

  4. PROBLEM SYMPTOM CONFIRMATION

    Result
    Result Proceed to
    Symptom does not occur. A
    Symptom occurs. B

    B

    GO TO STEP 6 Click here

    A

  5. SYMPTOM SIMULATION

    Result
    Proceed to
    NEXT

    NEXT

  6. CHECK CAN COMMUNICATION SYSTEM*


    1. Check for DTCs.

      Click here

      Result
      Result Proceed to
      CAN communication system DTCs are not output. A
      CAN communication system DTCs are output. B

      Tech Tips


      • If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.

      • If communication to the power steering ECU assembly cannot be established through the GTS, inspect terminals CANH and CANL of the DLC3 and the power steering ECU assembly, and the IG circuit of the power steering ECU assembly.


    B

    PROCEED TO CAN COMMUNICATION SYSTEM Click here

    A

  7. CHECK FOR DTC*


    1. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes

      Tech Tips

      Refer to Diagnostic Trouble Code Chart when any DTCs are output.

      Click here

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B

    GO TO STEP 10 Click here

    A

  8. 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 10 Click here

    A

  9. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Refer to Terminals of ECU.

      Click here

    2. Refer to Data List / Active Test.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  10. REPAIR OR REPLACE

    Result
    Proceed to
    NEXT

    NEXT

  11. CONFIRMATION TEST

    Result
    Proceed to
    NEXT

    NEXT

    END