LIGHTING SYSTEM Door Unlock Detection Switch Circuit

DTC Code DTC Name
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

E212453E24

PROCEDURE

  1. READ VALUE USING GTS

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    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.

      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

      -

      RR-Door Lock Pos SW

      Rear door RH unlock detection switch signal

      ON or OFF

      ON: Rear door RH or LH unlocked

      OFF: Rear door RH and LH locked

      -

      RL-Door Lock Pos SW

      Rear door LH unlock detection switch signal

      ON or OFF

      ON: Rear door RH or LH unlocked

      OFF: Rear door RH and LH locked

      -

      Body Electrical > Main Body > Data List

      Tester Display

      FR Door Lock Pos

      FL Door Lock Pos

      RR-Door Lock Pos SW

      RL-Door Lock Pos SW

      Result

      Result

      Proceed to

      OK

      A

      "FL Door Lock Pos" is not normal

      B

      "FR Door Lock Pos" is not normal

      C

      "RL-Door Lock Pos SW" is not normal

      D

      "RR-Door Lock Pos SW" is not normal

      E

      Both "RL-Door Lock Pos SW" and "RR-Door Lock Pos SW" are not normal

      F
    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    C

    INSPECT FRONT DOOR LOCK ASSEMBLY RHClick here

    D

    INSPECT REAR DOOR LOCK ASSEMBLY LHClick here

    E

    INSPECT REAR DOOR LOCK ASSEMBLY RHClick here

    F

    INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLYClick here

    B

  2. INSPECT FRONT DOOR LOCK ASSEMBLY LH

    1. Remove the front door lock assembly LH.

      Click here

    2. Inspect the front door lock assembly LH.

      Click here

      OK

      Front door lock assembly LH is normal.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT DOOR LOCK ASSEMBLY LH

    Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

    1. Disconnect the E22 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H6-8 (LSSR) - E22-7 (LSFL)

      Always

      Below 1 Ω

      H6-8 (LSSR) - Body ground

      Always

      10 kΩ or higher

      H6-7 (E) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT FRONT DOOR LOCK ASSEMBLY RH

    1. Remove the front door lock assembly RH.

      Click here

    2. Inspect the front door lock assembly RH.

      Click here

      OK

      Front door lock assembly RH is normal.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT DOOR LOCK ASSEMBLY RH

    Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

    1. Disconnect the E22 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G6-7 (LSSR) - E22-18 (LSFR)

      Always

      Below 1 Ω

      G6-7 (LSSR) - Body ground

      Always

      10 kΩ or higher

      G6-8 (E) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT REAR DOOR LOCK ASSEMBLY LH

    1. Remove the rear door lock assembly LH.

      Click here

    2. Inspect the rear door lock assembly LH.

      Click here

      OK

      Rear door lock assembly LH is normal.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE REAR DOOR LOCK ASSEMBLY LH

    Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

    1. Disconnect the 3E instrument panel junction block assembly connector.

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

      Standard Resistance

      Table 1. for RHD

      Tester Connection

      Condition

      Specified Condition

      K4-5 (LSSR) - 3E-37

      Always

      Below 1 Ω

      K4-5 (LSSR) - Body ground

      Always

      10 kΩ or higher

      K4-6 (E) - Body ground

      Always

      Below 1 Ω
      Table 2. for LHD

      Tester Connection

      Condition

      Specified Condition

      K4-6 (LSSR) - 3E-37

      Always

      Below 1 Ω

      K4-6 (LSSR) - Body ground

      Always

      10 kΩ or higher

      K4-9 (E) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the instrument panel junction block assembly.

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

      E258622C06

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3E-37 - MB-5 (LSR)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  9. INSPECT REAR DOOR LOCK ASSEMBLY RH

    1. Remove the rear door lock assembly RH.

      Click here

    2. Inspect the rear door lock assembly RH.

      Click here

      OK

      Rear door lock assembly RH is normal.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE REAR DOOR LOCK ASSEMBLY RH

    Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

    1. Disconnect the 3E instrument panel junction block assembly connector.

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

      Standard Resistance

      Table 3. for RHD

      Tester Connection

      Condition

      Specified Condition

      J4-9 (LSSR) - 3E-22

      Always

      Below 1 Ω

      J4-9 (LSSR) - Body ground

      Always

      10 kΩ or higher

      J4-10 (E) - Body ground

      Always

      Below 1 Ω
      Table 4. for LHD

      Tester Connection

      Condition

      Specified Condition

      J4-6 (LSSR) - 3E-22

      Always

      Below 1 Ω

      J4-6 (LSSR) - Body ground

      Always

      10 kΩ or higher

      J4-9 (E) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the instrument panel junction block assembly.

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

      E258622C06

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3E-22 - MB-5 (LSR)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  12. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the instrument panel junction block assembly.

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

      E258622C06

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3E-37 - MB-5 (LSR)

      Always

      Below 1 Ω

      3E-22 - MB-5 (LSR)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY