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

Figure 1. for LHD:

B000U3IE02

Figure 2. for RHD:

B000U3IE06

CAUTION / NOTICE / HINT

Note

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE


  1. READ VALUE USING GTS


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

      Click here


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Door Lock Pos Front door RH unlock detection switch signal LOCK or UNLOCK

      LOCK: Front door RH locked

      UNLOCK: Front door RH unlocked

      		 -
      FL Door Lock Pos Front door LH unlock detection switch signal LOCK or UNLOCK

      LOCK: Front door LH locked

      UNLOCK: Front door LH unlocked

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      FR Door Lock Pos
      FL Door Lock Pos
      OK
      Normal conditions listed above are displayed.
      Result
      Result Proceed to
      OK A
      NG ("FL Door Lock Pos" is abnormal) B
      NG ("FR Door Lock Pos" is abnormal) C

    A

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

    C

    INSPECT FRONT DOOR WITH MOTOR LOCK ASSEMBLY RH Click here

    B

  2. INSPECT FRONT DOOR WITH MOTOR LOCK ASSEMBLY LH


    1. Remove the front door with motor lock assembly LH.

      Click here

    2. Inspect the front door with motor lock assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT DOOR WITH MOTOR LOCK ASSEMBLY LH Click here REPLACE FRONT DOOR WITH MOTOR LOCK ASSEMBLY LH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FRONT DOOR WITH MOTOR LOCK ASSEMBLY LH - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the S4 front door with motor lock assembly LH connector.

    2. Disconnect the 3D*1 or 3A*2 driver side junction block assembly connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD, w/o Double Locking
      Tester Connection Condition Specified Condition
      S4-8 (LSSR) - 3D-31 Always Below 1 Ω
      S4-8 (LSSR) or 3D-31 - Body ground Always 10 kΩ or higher
      S4-7 (E) - Body ground Always Below 1 Ω
      for LHD, w/ Double Locking
      Tester Connection Condition Specified Condition
      S4-10 (LSSR) - 3D-31 Always Below 1 Ω
      S4-10 (LSSR) or 3D-31 - Body ground Always 10 kΩ or higher
      S4-9 (E) - Body ground Always Below 1 Ω
      for RHD, w/o Double Locking
      Tester Connection Condition Specified Condition
      S4-8 (LSSR) - 3A-15 Always Below 1 Ω
      S4-8 (LSSR) or 3A-15 - Body ground Always 10 kΩ or higher
      S4-7 (E) - Body ground Always Below 1 Ω
      for RHD, w/ Double Locking
      Tester Connection Condition Specified Condition
      S4-10 (LSSR) - 3A-15 Always Below 1 Ω
      S4-10 (LSSR) or 3A-15 - Body ground Always 10 kΩ or higher
      S4-9 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

      B000WBJC01
      *A for LHD *B for RHD
      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      3D-31 - A-19 (LSFL) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      3A-15 - A-19 (LSFL) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here

  5. INSPECT FRONT DOOR WITH MOTOR LOCK ASSEMBLY RH


    1. Remove the front door with motor lock assembly RH.

      Click here

    2. Inspect the front door with motor lock assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT DOOR WITH MOTOR LOCK ASSEMBLY RH Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (FRONT DOOR WITH MOTOR LOCK ASSEMBLY RH - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the R4 front door with motor lock assembly RH connector.

    2. Disconnect the 3B*1 or 3D*2 driver side junction block assembly connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD, w/o Double Locking
      Tester Connection Condition Specified Condition
      R4-7 (LSSR) - 3B-14 Always Below 1 Ω
      R4-7 (LSSR) or 3B-14 - Body ground Always 10 kΩ or higher
      R4-8 (E) - Body ground Always Below 1 Ω
      for LHD, w/ Double Locking
      Tester Connection Condition Specified Condition
      R4-5 (LSSR) - 3B-14 Always Below 1 Ω
      R4-5 (LSSR) or 3B-14 - Body ground Always 10 kΩ or higher
      R4-6 (E) - Body ground Always Below 1 Ω
      for RHD, w/o Double Locking
      Tester Connection Condition Specified Condition
      R4-7 (LSSR) - 3D-31 Always Below 1 Ω
      R4-7 (LSSR) or 3D-31 - Body ground Always 10 kΩ or higher
      R4-8 (E) - Body ground Always Below 1 Ω
      for RHD, w/ Double Locking
      Tester Connection Condition Specified Condition
      R4-5 (LSSR) - 3D-31 Always Below 1 Ω
      R4-5 (LSSR) or 3D-31 - Body ground Always 10 kΩ or higher
      R4-6 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

      B000YMAC01
      *A for LHD *B for RHD
      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      3B-14 - A-17 (LSFR) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      3D-31 - A-17 (LSFR) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here