LIGHTING SYSTEM Door Unlock Detection Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of each door unlock detection switch.

WIRING DIAGRAM

B0018YWE08

CAUTION / NOTICE / HINT

Note


  • 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), first perform the inspections in On-vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure Click here.

PROCEDURE


  1. READ VALUE USING GTS (DOOR LOCK POSITION SWITCH)


    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 / Main Body / Data List.

    5. Read the Data List according to the display on the GTS.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Door Lock Pos

      Front door unlock detection switch RH signal/

      LOCK or UNLOCK

      LOCK: Front door RH locked

      UNLOCK: Front door RH unlocked

      		 -
      FL Door Lock Pos

      Front door unlock detection switch LH signal/

      LOCK or UNLOCK

      LOCK: Front door LH locked

      UNLOCK: Front door LH unlocked

      		 -
      RR-Door Lock Pos SW

      Rear door unlock detection switch RH signal/

      ON or OFF

      ON: Rear door RH unlocked

      OFF: Rear door RH locked

      		 -
      RL-Door Lock Pos SW

      Rear door unlock detection switch LH signal/

      ON or OFF

      ON: Rear door LH unlocked

      OFF: Rear door LH locked

      		 -
      OK
      The display is as specified in the normal condition column.
      Result
      Result Proceed to
      OK A
      NG (Front door unlock detection switch RH does not operate) B
      NG (Front door unlock detection switch LH does not operate) C
      NG (Rear door unlock detection switch RH does not operate) D
      NG (Rear door unlock detection switch LH does not operate) E

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    INSPECT FRONT DOOR LOCK ASSEMBLY LH Click here

    D

    INSPECT REAR DOOR LOCK ASSEMBLY RH Click here

    E

    INSPECT REAR DOOR LOCK ASSEMBLY LH Click here

    B

  2. INSPECT FRONT DOOR LOCK ASSEMBLY RH


    1. Remove the front door lock RH Click here.

    2. Inspect the front door lock RH Click here.


    NG

    REPLACE FRONT DOOR LOCK ASSEMBLY RH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - FRONT DOOR LOCK RH AND BODY GROUND)


    1. Disconnect the I6 front door lock RH connector.

    2. Disconnect the 2J cowl side junction block LH connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I6-7 (LSSR) - 2J-16 Always Below 1 Ω
      I6-8 (E) - Body ground Always Below 1 Ω
      I6-7 (LSSR) or 2J-16 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK COWL SIDE JUNCTION BLOCK LH


    1. Remove the cowl side junction block LH.


    2. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH.


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

      B001969E03
      Text in Illustration
      *a

      Component without harness connected

      (Cowl Side Junction Block LH)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      MB-17 (LSFR) - 2J-16 Always Below 1 Ω
      MB-17 (LSFR) or 2J-16 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

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

    B

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

    C

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    D

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

  5. INSPECT FRONT DOOR LOCK ASSEMBLY LH


    1. Remove the front door lock LH Click here.

    2. Inspect the front door lock LH Click here.


    NG

    REPLACE FRONT DOOR LOCK ASSEMBLY LH Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - FRONT DOOR LOCK LH AND BODY GROUND)


    1. Disconnect the I14 front door lock LH connector.

    2. Disconnect the 2J cowl side junction block LH connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I14-8 (LSSR) - 2J-19 Always Below 1 Ω
      I14-7 (E) - Body ground Always Below 1 Ω
      I14-8 (LSSR) or 2J-19 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK COWL SIDE JUNCTION BLOCK LH


    1. Remove the cowl side junction block LH.


    2. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH.


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

      B0019Z8E03
      Text in Illustration
      *a

      Component without harness connected

      (Cowl Side Junction Block LH)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      MB-19 (LSFL) - 2J-19 Always Below 1 Ω
      MB-19 (LSFL) or 2J-19 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

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

    B

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

    C

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    D

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

  8. INSPECT REAR DOOR LOCK ASSEMBLY RH


    1. Remove the rear door lock RH Click here.

    2. Inspect the rear door lock RH Click here.


    NG

    REPLACE REAR DOOR LOCK ASSEMBLY RH Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - REAR DOOR LOCK RH AND BODY GROUND)


    1. Disconnect the J6 rear door lock LH connector.

    2. Disconnect the E117 main body ECU (multiplex network body ECU) connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J6-6 (LSSR) - E117-2 (LSWR) Always Below 1 Ω
      J6-9 (E) - Body ground Always Below 1 Ω
      J6-6 (LSSR) or E117-2 (LSWR) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

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

    B

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

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. INSPECT REAR DOOR LOCK ASSEMBLY LH


    1. Remove the rear door lock LH Click here.

    2. Inspect the rear door lock LH Click here.


    NG

    REPLACE REAR DOOR LOCK ASSEMBLY LH Click here

    OK

  11. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK LH - COWL SIDE JUNCTION BLOCK LH AND BODY GROUND)


    1. Disconnect the J13 rear door lock LH connector.

    2. Disconnect the 2K cowl side junction block LH connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J13-6 (LSSR) - 2K-33 Always Below 1 Ω
      J13-9 (E) - Body ground Always Below 1 Ω
      J13-6 (LSSR) - 2K-33 or Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK COWL SIDE JUNCTION BLOCK LH


    1. Remove the cowl side junction block LH.


    2. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH.


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

      B0018W0E03
      Text in Illustration
      *a

      Component without harness connected

      (Cowl Side Junction Block LH)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      MB-5 (LSWL) - 2K-33 Always Below 1 Ω
      MB-5 (LSWL) or 2K-33 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

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

    B

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

    C

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    D

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here