LIGHTING SYSTEM Interior Light Circuit

DTC Code DTC Name
Interior Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the ignition key cylinder light (w/o Entry and Start System), map light and No. 1 room light.

WIRING DIAGRAM

E270022E01

CAUTION / NOTICE / HINT

Note:

  • Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE

  1. PERFORM ACTIVE TEST USING GTS (MAP LIGHT, NO. 1 ROOM LIGHT AND IGNITION KEY CYLINDER LIGHT)

    1. Using the GTS, perform the Active Test.

      Click here

      Body Electrical > Main Body > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Illuminated Entry System

      Map light, ignition key cylinder light (w/o Entry and Start System) and No. 1 room light

      ON or OFF

      Turn the map light switch and No. 1 room light switch to the DOOR position.

      Body Electrical > Main Body > Active Test

      Tester Display

      Illuminated Entry System

    Result

    Result

    Proceed to

    Map light assembly, No. 1 room light assembly and ignition key cylinder light comes on

    A

    Map light assembly and No. 1 room light assembly does not comes on

    B

    Map light assembly or No. 1 room light assembly does not comes on

    C

    Ignition key cylinder light does not comes on (w/o Entry and Start System)

    D
    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    C

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    D

    INSPECT TRANSPONDER KEY COIL (IGNITION KEY CYLINDER LIGHT)Click here

    B

  2. INSPECT MAP LIGHT ASSEMBLY

    1. Remove the map light assembly.

      Click here

    2. Inspect the map light assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE MAP LIGHT ASSEMBLY

    Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - BATTERY AND BODY GROUND)

    1. E270023C01

      *A

      w/ Sliding Roof System

      *B

      w/o Sliding Roof System

      Disconnect the map light assembly connector.

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

      Standard Voltage

      w/ Sliding Roof System

      Tester Connection

      Condition

      Specified Condition

      Q12-3 (+B1) - Body ground

      Battery saving control (interior light auto cut function) not operating

      11 to 14 V

      w/o Sliding Roof System

      Tester Connection

      Condition

      Specified Condition

      Q11-3 (+B1) - Body ground

      Battery saving control (interior light auto cut function) not operating

      11 to 14 V

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

      Standard Resistance

      w/ Sliding Roof System

      Tester Connection

      Condition

      Specified Condition

      Q12-1 (GND) - Body ground

      Always

      Below 1 Ω

      w/o Sliding Roof System

      Tester Connection

      Condition

      Specified Condition

      Q11-1 (GND) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    1. Disconnect the Q12*1 or Q11*2 map light assembly connector.

      *1: w/ Sliding Roof System

      *2: w/o Sliding Roof System

    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

      w/ Sliding Roof System

      Tester Connection

      Condition

      Specified Condition

      Q12-2 (CTY) - 3D-35

      Always

      Below 1 Ω

      Q12-2 (CTY) - Body ground

      Always

      10 kΩ or higher

      w/o Sliding Roof System

      Tester Connection

      Condition

      Specified Condition

      Q11-2 (CTY) - 3D-35

      Always

      Below 1 Ω

      Q11-2 (CTY) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:

    Click here

    for RHD:

    Click here

    OK

  5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. E270727N02

      Remove the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

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

      for LHD:

      Click here

      for RHD:

      Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A-1 (ILE) - 3D-35

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:

    Click here

    for RHD:

    Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:

    Click here

    for RHD:

    Click here

  6. INSPECT TRANSPONDER KEY COIL (IGNITION KEY CYLINDER LIGHT)

    1. Remove the transponder key coil (ignition key cylinder light).

      Click here

    2. Inspect the transponder key coil (ignition key cylinder light).

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE TRANSPONDER KEY COIL (IGNITION KEY CYLINDER LIGHT)

    Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY COIL [IGNITION KEY CYLINDER LIGHT] - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BATTERY)

    1. Disconnect the G6 transponder key coil (ignition key cylinder light) connector.

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

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      G6-2 (ILL+) - Body ground

      Always

      11 to 14 V

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G6-4 (ILL-) - 3D-44

      Always

      Below 1 Ω

      G6-4 (ILL-) - 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. E270727N01

      Remove the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

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

      for LHD:

      Click here

      for RHD:

      Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A-26 (KILE) - 3D-44

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:

    Click here

    for RHD:

    Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:

    Click here

    for RHD:

    Click here