POWER BACK DOOR SYSTEM Power Back Door Warning System does not Operate

DESCRIPTION

When the power back door warning system does not operate, one of the following may be malfunctioning: 1) power back door warning buzzer circuit, 2) wireless door lock control system or 3) power back door ECU.

WIRING DIAGRAM

A01ELYAE14

INSPECTION PROCEDURE

Note


  • The power back door warning function can be customized. Make sure the function is ON. Click here


  • The power back door system uses a CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the power back door system after confirming that the communication system is functioning properly.

PROCEDURE


  1. CHECK OPERATION


    1. Check power back door system operation.

      Result
      Result Proceed to
      Power back door warning buzzer does not operate A
      Hazard warning light does not come on B
      Power back door warning buzzer in the power back door ECU does not operate C

    B

    CHECK WIRELESS DOOR LOCK CONTROL SYSTEM (HAZARD ANSWER-BACK FUNCTION) Click here

    C

    REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (POWER BACK DOOR WARNING BUZZER)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch to on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Back Door / Data List.

    5. Using the GTS, perform the Active Test to generate a control command, and check that the power back door warning buzzer sounds.

      Back Door (Power Back Door ECU)
      Tester Display Test Part Control Range Diagnostic Note
      PBD Buzzer Power back door warning buzzer sound ON / OFF -
      OK
      Buzzer sounds normally.

    NG

    CHECK HARNESS AND CONNECTOR (POWER BACK DOOR WARNING BUZZER - POWER BACK DOOR ECU) Click here

    OK

    REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) Click here

  3. CHECK HARNESS AND CONNECTOR (POWER BACK DOOR WARNING BUZZER - POWER BACK DOOR ECU)


    1. A01EKZQE07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Back Door Warning Buzzer)
      *2

      Front view of wire harness connector

      (to Power Back Door ECU)

      Disconnect the R18 power back door warning buzzer connector and L20 power back door ECU connector.

    2. Disconnect the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      R18-2 (BZR+) - L20-26 (BZR+) Always Below 1 Ω
      R18-1 (BZR-) - Body ground Always Below 1 Ω
      R18-2 (BZR+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE POWER BACK DOOR WARNING BUZZER


    1. Temporarily replace the power back door warning buzzer with a new one Click here.


    NEXT

  5. CHECK POWER BACK DOOR WARNING BUZZER OPERATION


    1. Check the operation of the power back door warning function.

      OK
      Power back door warning function operates normally.

    NG

    REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) Click here

    OK

    END (POWER BACK DOOR WARNING BUZZER WAS DEFECTIVE)

  6. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM (HAZARD ANSWER-BACK FUNCTION)


    1. Check wireless door lock operation.

      Result
      Result Proceed to
      Hazard answer-back function operates normally A
      Hazard answer-back function does not operate (w/ Smart Entry and Start System) B
      Hazard answer-back function does not operate (w/o Smart Entry and Start System) C

    B

    GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Entry and Start System) (NO ANSWER-BACK) Click here

    C

    GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Entry and Start System) (NO ANSWER-BACK) Click here

    A

  7. REPLACE POWER BACK DOOR MOTOR UNIT (POWER BACK DOOR ECU)


    1. Replace the power back door ECU (power back door motor unit) Click here.


    NEXT

  8. CHECK POWER BACK DOOR OPERATION


    1. Check that the power back door hazard warning lights operate normally Click here.

      OK
      The power back door hazard warning lights operate normally.

    NG

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here

    OK

    END (POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) WAS DEFECTIVE)