AUTOMATIC TRANSAXLE SYSTEM (for 1AZ-FE) HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • The ECM of this system is connected to the CAN and multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN and multiplex communication systems.

  • *: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS


    1. Refer to How to Troubleshoot ECU Controlled Systems in the Introduction section Click here.


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  3. INSPECT BATTERY VOLTAGE

    Standard voltage
    11 to 14 V

    If the voltage is below 11 V, recharge or replace the battery before proceeding.


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  4. CONNECT INTELLIGENT TESTER TO DLC3*


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  5. CHECK AND CLEAR DTCS AND FREEZE FRAME DATA*


    1. Refer to DTC Check / Clear Click here.


      NEXT

  6. VISUAL INSPECTION


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  7. SETTING CHECK MODE DIAGNOSIS*


    1. Refer to Check Mode Procedure Click here.


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  8. PROBLEM SYMPTOM CONFIRMATION


    1. Refer to Road Test Click here.

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

      B

      GO TO STEP 10
      A

  9. SYMPTOM SIMULATION


    1. Refer to Electronic Circuit Inspection Procedure Click here.


      NEXT

  10. DTC CHECK*


    1. Refer to DTC Check / Clear Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

      B

      GO TO STEP 18
      A

  11. BASIC INSPECTION


    1. Refer to Automatic Transaxle Fluid Click here.

    2. Refer to Park/Neutral Position Switch Click here.

    3. Refer to Shift Lever Click here.


      NG

      GO TO STEP 21
      OK

  12. MECHANICAL SYSTEM TESTS


    1. Refer to Mechanical System Tests Click here.


      NG

      GO TO STEP 17
      OK

  13. HYDRAULIC TEST


    1. Refer to Hydraulic Test Click here.


      NG

      GO TO STEP 17
      OK

  14. MANUAL SHIFTING TEST


    1. Refer to Manual Shifting Test Click here.


      NG

      GO TO STEP 16
      OK

  15. PROBLEM SYMPTOMS TABLE CHAPTER 1


    1. Refer to Problem Symptoms Table Click here.


      NG

      GO TO STEP 19
      OK

  16. PROBLEM SYMPTOMS TABLE CHAPTER 2


    1. Refer to Problem Symptoms Table Click here.


      NEXT

  17. PART INSPECTION


    NG

    GO TO STEP 21
    OK

  18. DTC CHART


    1. Refer to Diagnostic Trouble Code Chart Click here.


      NEXT

  19. CIRCUIT INSPECTION


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  20. IDENTIFICATION OF PROBLEM


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  21. REPAIR OR REPLACE


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  22. CONFIRMATION TEST


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    END