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

DESCRIPTION

If the power back door warning system does not operate, there may be a malfunction in one of the following: 1) wireless door lock control system, 2) power back door warning buzzer circuit or 3) multiplex network door ECU.

WIRING DIAGRAM

B005NEME14

CAUTION / NOTICE / HINT

Note


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

    Click here

  • If the multiplex network door ECU has been removed and installed or replaced, or if any of the connectors has been disconnected, initialize the power back door system.

    Click here

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

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), inspect the main body ECU (multiplex network body ECU) power source circuit for malfunctions before performing this troubleshooting procedure.*

    Click here


    • *: w/o Canister Pump Module with Door Ajar Warning Function

PROCEDURE


  1. CHECK OPERATION


    1. Check the power back door system operation.

      Click here

      Result
      Result Proceed to
      Hazard warning lights do not flash (w/ Power Back Door Hazard Warning Light) A
      Power back door warning buzzer does not operate B

    B

    PERFORM ACTIVE TEST USING GTS (PBD Buzzer) Click here

    A

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


    1. Check wireless door lock operation.

      Click here

      OK
      Hazard answer-back function operates normally
      Result
      Proceed to
      OK
      NG

    NG

    GO TO WIRELESS DOOR LOCK CONTROL SYSTEM Click here

    OK

  3. REPLACE MULTIPLEX NETWORK DOOR ECU


    1. Replace the multiplex network door ECU with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. INITIALIZE MULTIPLEX NETWORK DOOR ECU


    1. Initialize the multiplex network door ECU.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK POWER BACK DOOR SYSTEM


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

      Click here

      OK
      Power back door hazard warning lights operate normally
      Result
      Proceed to
      OK
      NG

    OK

    END (MULTIPLEX NETWORK DOOR ECU WAS MALFUNCTIONING)

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  6. PERFORM ACTIVE TEST USING GTS (PBD Buzzer)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Perform the Active Test according to the display on the GTS.


      Body Electrical > Back Door > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      PBD Buzzer Power back door warning buzzer sound OFF or ON -

      Body Electrical > Back Door > Active Test
      Tester Display
      PBD Buzzer
      OK
      Power back door warning buzzer sounds
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    NG

  7. CHECK HARNESS AND CONNECTOR (POWER BACK DOOR WARNING BUZZER - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND)


    1. Disconnect the Z24 power back door warning buzzer connector.

    2. Disconnect the Z16 multiplex network door ECU connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Z24-1 (BZR+) - Z16-16 (BZR+) Always Below 1 Ω
      Z24-2 (BZR-) - Body ground Always Below 1 Ω
      Z24-1 (BZR+) or Z16-16 (BZR+) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. REPLACE POWER BACK DOOR WARNING BUZZER


    1. Replace the power back door warning buzzer with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK POWER BACK DOOR SYSTEM


    1. Check that the power back door warning buzzer operates normally.

      Click here

      OK
      Power back door warning buzzer sounds
      Result
      Proceed to
      OK
      NG

    OK

    END (POWER BACK DOOR WARNING BUZZER WAS MALFUNCTIONING)

    NG

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here