POWER DOOR LOCK CONTROL SYSTEM Only Back Door cannot be Opened

DESCRIPTION

The main body ECU receives signals from the back door opener switch assembly. Then, the main body ECU activates the back door lock motor.

WIRING DIAGRAM

A004F03E02

CAUTION / NOTICE / HINT

Note

Inspect the fuses of circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. SYSTEM CHECK


    1. Check the vehicle specification.

      Result
      Result Proceed to
      w/o Entry and Start System A
      w/ Entry and Start System B

    B

    GO TO ENTRY AND START SYSTEM Click here

    A

  2. READ VALUE USING GTS (DOOR LOCK STATUS)


    1. Unlock all doors.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / Main Body / Data List.

    6. According to the display on the GTS, read the Data List.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Open Back door open status / Prohibit or Permit

      Prohibit: Back door locked

      Permit: Back door unlocked

      		 -
      OK
      The GTS indicates Permit according to the door lock operation shown in the table.

    NG

    REPLACE MAIN BODY ECU Click here

    OK

  3. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Turn the GTS on

    4. Enter the following menus: Body Electrical / Main Body / Active Test.

    5. According to the display on the GTS, perform the Active Test.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Trunk and Back-Door Open Back door lock motor OFF / ON -
      OK
      The back door lock assembly unlatches when ON is selected.

    NG

    INSPECT BACK DOOR LOCK ASSEMBLY Click here

    OK

  4. READ VALUE USING GTS (BACK DOOR OPEN HANDLE SW)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Open Handle SW Back door opener switch signal / OFF or ON

      OFF: Back door opener switch not pushed

      ON: Back door opener switch pushed

      		 -
      OK
      The GTS indicates ON or OFF according to the switch operation shown in the table.

    OK

    REPLACE MAIN BODY ECU Click here

    NG

    INSPECT BACK DOOR OPENER SWITCH ASSEMBLY Click here

  5. INSPECT BACK DOOR LOCK ASSEMBLY


    1. Inspect the back door lock assembly Click here.


    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the P5 back door lock assembly connector.

    2. Disconnect the 3D instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P5-1 (ACT+) - 3D-9 Always Below 1 Ω
      P5-2 (ACT-) - Body ground Always Below 1 Ω
      P5-1 (ACT+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Replace the instrument panel junction block assembly Click here.


    NEXT

  8. CHECK BACK DOOR OPEN OPERATION


    1. Check that the back door can be opened.

      OK
      The back door can be opened normally.

    OK

    END (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU Click here

  9. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


    1. Inspect the back door opener switch assembly Click here.


    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BACK DOOR OPENER SWITCH ASSEMBLY)


    1. Disconnect the F57 main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F57-23 (BDSU) - P6-3 (B) Always Below 1 Ω
      P6-2 (L) - Body ground Always Below 1 Ω
      P6-3 (B) - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR