Power Steering System (For Hatchback) How To Proceed With Troubleshooting

Steering. Yaris. Ncp93, 131
Power Assist Systems. Yaris. Ncp93, 131

  1. VEHICLE BROUGHT TO WORKSHOP

  2. INSPECT BATTERY VOLTAGE

  3. CHECK DTC AND FREEZE FRAME DATA*

  4. PROBLEM SYMPTOM CONFIRMATION

  5. SYMPTOM SIMULATION

  6. CHECK CAN COMMUNICATION SYSTEM*

  7. CHECK FOR DTC*

  8. PROBLEM SYMPTOMS TABLE

  9. OVERALL ANALYSIS AND TROUBLESHOOTING*

  10. REPAIR OR REPLACE

  11. CONFIRMATION TEST

Power Steering System (For Hatchback) -- How To Proceed With Troubleshooting


HINT:
  1. Use these procedures to troubleshoot the power steering system.
  2. *: Use the Techstream.


1.VEHICLE BROUGHT TO WORKSHOP

    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.

    NEXT


    3.CHECK DTC AND FREEZE FRAME DATA*
      HINT:
      Refer to Clear DTCs (YARIS_NCP93 RM000001AL601KX.html).

    NEXT


    4.PROBLEM SYMPTOM CONFIRMATION
      Result
      Result
      		Proceed to
      Symptom does not occur
      		A
      Symptom occurs
      		B


    		B.
    Go to step 10
    A


    5.SYMPTOM SIMULATION

      NEXT


      6.CHECK CAN COMMUNICATION SYSTEM*

      1. Check for DTCs (YARIS_NCP93 RM000001AL601KX.html).

        Result
        Result
        		Proceed to
        CAN communication system DTC is not output
        		A
        CAN communication system DTC is output
        (for Hatchback except Separate Type Yaw Rate Sensor)
        		B
        CAN communication system DTC is output
        (for Hatchback with Separate Type Yaw Rate Sensor)
        		C

        HINT:
        1. If any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.
        2. If communication to the power steering ECU cannot be established through the Techstream, 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) (YARIS_NCP93 RM000001RSO05UX.html)

      		C.
      PROCEED TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (YARIS_NCP93 RM000001RSO066X.html)
      A


      7.CHECK FOR DTC*

      1. Check for DTCs (YARIS_NCP93 RM000001AL601KX.html).

        HINT:
        Refer to Diagnostic Trouble Code Chart when any DTCs are output (YARIS_NCP93 RM000001AKD032X.html).
        Result
        Result
        		Proceed to
        DTC is not output
        		A
        DTC is output
        		B


      		B.
      Go to step 10
      A


      8.PROBLEM SYMPTOMS TABLE

      1. Refer to Problem Symptoms Table (YARIS_NCP93 RM000001AKG01XX.html).

        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
      A


      9.OVERALL ANALYSIS AND TROUBLESHOOTING*

      1. Refer to Terminals of ECU (YARIS_NCP93 RM000001AKF022X.html).

      2. Refer to Data List/Active Test (YARIS_NCP93 RM000001AL8022X.html).


      NEXT


      10.REPAIR OR REPLACE

        NEXT


        11.CONFIRMATION TEST

          NEXT

          END