POWER DOOR LOCK CONTROL SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedure to troubleshoot the power door lock control system.

  • *: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT

  2. CUSTOMER PROBLEM ANALYSIS

    Tech Tips


    • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.

    • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.


    • The following 5 items are important points for problem analysis:

      What Vehicle model, system name
      When Date, time, occurrence frequency
      Where Road conditions
      Under what conditions? Running conditions, driving conditions, weather conditions
      How did it happen? Problem symptoms

    NEXT

  3. INSPECT AUXILIARY BATTERY VOLTAGE


    1. Measure the auxiliary battery voltage with the power switch off.

      Standard Voltage
      11 to 14 V

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


      NEXT

  4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


    1. Use the intelligent tester to check if the CAN communication system is functioning normally.

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

      B

      GO TO CAN COMMUNICATION SYSTEM Click here

      A

  5. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Use the intelligent tester to check if the LIN communication system is functioning normally Click here.

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

      B

      GO TO LIN COMMUNICATION SYSTEM Click here

      A

  6. CHECK FOR DTC (MASTER SWITCH)*


    1. Clear the DTCs Click here.

    2. Recheck for DTCs.

      Result
      Result Proceed to
      DTC B2312 is output A
      DTC B2312 is not output B

      A

      GO TO POWER WINDOW CONTROL SYSTEM (DTC B2312) Click here

      B

  7. CHECK FOR DTC*


    1. Clear the DTCs Click here.

    2. Recheck for DTCs.

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

      B

      GO TO DIAGNOSTIC TROUBLE CODE CHART 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
      A

  9. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Terminals of ECU Click here

    2. Data List / Active Test Click here

    3. Operation Check Click here


      NEXT

  10. REPAIR OR REPLACE


    NEXT

  11. CONFIRMATION TEST


    NEXT
    END