LIGHTING SYSTEM Interior Light Auto Cut Circuit

DESCRIPTION

When the battery saving control operates, the main body ECU (multiplex network body ECU) controls the operation of the DOME CUT relay that is built into the instrument panel junction block assembly to turn off the interior lights.

WIRING DIAGRAM

A01VU8SE02

CAUTION / NOTICE / HINT

Note


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

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

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before proceeding with troubleshooting, perform an on-vehicle inspection and confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

    Click here


    • *: w/o Canister Pump Module with Door Ajar Warning Buzzer Function

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    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 / 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
      Relay for Interior Light Auto Cut Function DOME CUT relay ON or OFF

      • ON: DOME CUT relay off (interior lights turn off)

      • OFF: DOME CUT relay on (interior lights turn on)

      Body Electrical > Main Body > Active Test
      Tester Display
      Relay for Interior Light Auto Cut Function
      OK
      All of the interior lights turn off when ON is selected.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 2E*1 or 2G*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
      2E-1 - Body ground*1 Always 11 to 14 V
      2G-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

  3. INSPECT 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 voltage and resistance according to the value(s) in the table below.

      A01VXLHC04
      *A for LHD *B for RHD
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      2D-19 - Battery negative terminal

      Battery positive (+) → 2E-1

      Battery negative (-) → MB-23 (DOMR)

      		 11 to 14 V
      2B-9 - Battery negative terminal

      Battery positive (+) → 2E-1

      Battery negative (-) → MB-23 (DOMR)

      		 11 to 14 V
      2B-10 - Battery negative terminal

      Battery positive (+) → 2E-1

      Battery negative (-) → MB-23 (DOMR)

      		 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      2D-19 - Battery negative terminal

      Battery positive (+) → 2G-1

      Battery negative (-) → MB-23 (DOMR)

      		 11 to 14 V
      2B-9 - Battery negative terminal

      Battery positive (+) → 2G-1

      Battery negative (-) → MB-23 (DOMR)

      		 11 to 14 V
      2B-10 - Battery negative terminal

      Battery positive (+) → 2G-1

      Battery negative (-) → MB-23 (DOMR)

      		 11 to 14 V
      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      2E-1 - 2D-19 Always 10 kΩ or higher
      2E-1 - 2B-9 Always 10 kΩ or higher
      2E-1 - 2B-10 Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      2G-1 - 2D-19 Always 10 kΩ or higher
      2G-1 - 2B-9 Always 10 kΩ or higher
      2G-1 - 2B-10 Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/o Stop and start system) A
      OK (w/ Stop and start system) B
      NG C

    A

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

    C

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    B

  4. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 2C 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
      2C-7 - Body ground Engine switch on (IG) 10.5 to 16 V
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STOP AND START SYSTEM Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)


    1. Disconnect the 2A 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
      2A-19 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT 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 voltage and resistance according to the value(s) in the table below.

      A01VWFMC02
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Voltage
      Tester Connection Condition Specified Condition
      2C-7 - 2B-5 Battery not connected to 2A-16 and 2A-19 10 kΩ or higher
      2C-7 - 2B-5

      Battery positive (+) → 2A-16

      Battery negative (-) → 2A-19

      		 Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here