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

A01VHA7E02

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 INTELLIGENT TESTER (DOOR LOCK STATUS)


    1. Unlock all doors.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the intelligent tester on.

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

    6. According to the display on the intelligent tester, 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 intelligent tester 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 INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on

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

    5. According to the display on the intelligent tester, 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 INTELLIGENT TESTER (BACK DOOR OPEN HANDLE SW)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. According to the display on the intelligent tester, 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 intelligent tester 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 P12 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
      P12-1 (ACT+) - 3D-9 (ACT+) Always Below 1 Ω
      P12-2 (ACT-) - Body ground Always Below 1 Ω
      P12-1 (ACT+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    A01VFUFE01
    Text in Illustration
    *A for LHD *B for RHD
    *a

    Component without harness connected

    (Instrument Panel Junction Block Assembly)

    		 - -

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

    2. Remove the main body ECU.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      3E-1 - 3D-9 Always 10 kΩ or higher
      3E-1 - MB-6 (TR+) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      3F-1 - 3D-9 Always 10 kΩ or higher
      3F-1 - MB-6 (TR+) Always Below 1 Ω

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      3D-9 - Body ground

      Battery positive (+) → 3E-1

      Battery negative (-) → MB-6

      		 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      3D-9 - Body ground

      Battery positive (+) → 3F-1

      Battery negative (-) → MB-6

      		 11 to 14 V

    OK

    REPLACE MAIN BODY ECU Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  8. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


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


    NG

    REPLACE MAIN BODY ECU Click here

    OK

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


    1. Disconnect the F76 main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-23 (BDSU) - P8-3 (B) Always Below 1 Ω
      P8-2 (L) - Body ground Always Below 1 Ω
      P8-3 (B) - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR