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 intelligent tester.

PROCEDURE


  1. VEHICLE BROUGHT TO WORKSHOP

    Result
    Proceed to
    NEXT

    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.

    Result
    Proceed to
    NEXT

    NEXT

  3. CHECK DTC AND FREEZE FRAME DATA*

    Tech Tips

    Refer to Clear DTCs.

    Click here

    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 10 Click here

    A

  5. SYMPTOM SIMULATION

    Result
    Proceed to
    NEXT

    NEXT

  6. CHECK CAN COMMUNICATION SYSTEM*


    1. Check if a CAN communication system DTC is output.


      Result
      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system DTC is output (w/o Toyota Safety Sense) B
      CAN communication system DTC is output (w/ Toyota Safety Sense) C

      Tech Tips


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

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


    B

    PROCEED TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    PROCEED TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  7. CHECK FOR DTC*


    1. Check for DTCs.

      Click here

      Tech Tips

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

      Click here

      Result
      Result Proceed to
      DTC is not output A
      DTC is 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