LIGHTING SYSTEM Interior Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the following lights:


WIRING DIAGRAM

B006X8BE01
B006Y20E02

CAUTION / NOTICE / HINT

Note


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

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.*1

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*2

    Click here


    • *1: w/ Smart Entry and Start System

    • *2: w/ Door Control Battery

Tech Tips

The DOME CUT relay supplies power to the interior lights. If all the lights that use power from the DOME CUT relay do not turn on, check the interior light auto cut circuit first.

Click here

PROCEDURE


  1. PERFORM ACTIVE TEST 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 / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Illuminated Entry System Turns on the lights that are controlled by the illuminated entry system* OFF or ON

      w/ Room Light (for LED Type):

      Perform the Active Test with the door linked switch of the map light (roof console box sub-assembly) on and switches of the spot light assembly LH and RH off.

      w/ Room Light (for Bulb Type):

      Perform the Active Test with switch of the room light assembly in the DOOR position.

      • *: Refer to System Description for the lights that are controlled by the illuminated entry system.

        Click here


      Body Electrical > Main Body > Active Test
      Tester Display
      Illuminated Entry System
      OK
      All lights that are controlled by the illuminated entry system come on.
      Result
      Result Proceed to
      OK A
      NG (Map light (roof console box sub-assembly) and/or spot light assembly do not come on (w/ Room Light (for LED Type))) B
      NG (Room light assembly does not come on (w/ Room Light (for Bulb Type))) C
      NG (Ignition key cylinder light (transponder key coil) does not come on) D
      NG (All lights that are controlled by the illuminated entry system do not come on) E

    A

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

    C

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    D

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

    E

    INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    B

  2. INSPECT MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY)


    1. Remove the map light (roof console box sub-assembly).

      Click here

    2. Inspect the map light (roof console box sub-assembly).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY) Click here

    OK

  3. INSPECT SPOT LIGHT ASSEMBLY


    1. Remove the spot light assembly.

      Click here

    2. Inspect the spot light assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPOT LIGHT ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY) - SPOT LIGHT ASSEMBLY)


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

      Standard Resistance
      for Normal Roof
      Tester Connection Condition Specified Condition
      V13-1 (+B1) - V11-5 (B) Always Below 1 Ω
      V13-2 (RLMP) - V11-2 (CTY) Always Below 1 Ω
      V13-1 (+B1) or V11-5 (B) - Body ground Always 10 kΩ or higher
      V13-2 (RLMP) or V11-2 (CTY) - Body ground Always 10 kΩ or higher
      except Normal Roof
      Tester Connection Condition Specified Condition
      V14-14 (+B1) - V11-5 (B) Always Below 1 Ω
      V14-2 (RLMP) - V11-2 (CTY) Always Below 1 Ω
      V14-14 (+B1) or V11-5 (B) - Body ground Always 10 kΩ or higher
      V14-2 (RLMP) or V11-2 (CTY) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY))


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

    2. Connect the V13*1 or V14*2 map light (roof console box sub-assembly) connector.


      • *1: for Normal Roof

      • *2: except Normal Roof

    3. Apply battery voltage to the connector and check that the map light comes on.

      OK
      Measurement Condition Condition Specified Condition

      Battery positive (+) → 3B-10

      Battery negative (-) → 3B-29

      		 Door linked switch on and map light switch LH and RH off Map light LH and RH come on
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 11 Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


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

    2. Apply battery voltage to the connector and check that the room light comes on.

      OK
      Measurement Condition Condition Specified Condition

      Battery positive (+) → 3B-10

      Battery negative (-) → 3B-29

      		 Room light switch in DOOR position Room light comes on
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 11 Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INCLUDING BULB HOLDER OF THE ROOM LIGHT ASSEMBLY THAT ARE PART OF THE WIRE HARNESS)

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


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

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  8. CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 3F*1 or 3G*2 instrument panel junction block assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      3F-1 - Body ground*1 Always 11 to 14 V
      3G-1 - Body ground*2 Always 11 to 14 V

      • *1: for LHD

      • *2: for RHD

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    B006ZGDC25
    *A for LHD *B for RHD
    *a

    Component without harness connected

    (Instrument Panel Junction Block Assembly)

    		 - -

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-24 - 3F-1*1 Always Below 1 Ω
      3B-24 - 3G-1*2 Always Below 1 Ω

      • *1: for LHD

      • *2: for RHD

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (IGNITION KEY CYLINDER LIGHT (TRANSPONDER KEY COIL) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K61-2 (ILL+) - 3B-24 Always Below 1 Ω
      K61-4 (ILL-) - 3B-29 Always Below 1 Ω
      K61-2 (ILL+) or 3B-24 - Body ground Always 10 kΩ or higher
      K61-4 (ILL-) or 3B-29 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    B006WSYC26
    *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 (multiplex network body ECU) from the instrument panel junction block assembly.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-29 - MB-1 (ILE) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here