LIGHTING SYSTEM Inside Handle Illumination Light Circuit

DESCRIPTION

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



WIRING DIAGRAM

B006YFYE01

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

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
      Interior Illumination Light2

      • Front door inside handle illumination light (No. 1 interior illumination light assembly)

      • Rear door inside handle illumination light (No. 2 interior illumination light assembly)*

      		 OFF or ON

      Preconditions for using the Active Test to check dimmer controlled illumination:


      • Ignition switch ON

      • Shift lever is in any position other than P

      • *: w/ Rear Door Inside Handle Illumination Light


      Body Electrical > Main Body > Active Test
      Tester Display
      Interior Illumination Light2
      OK
      Inside handle illumination lights come on.
      Result
      Result Proceed to
      OK A
      NG (Front door inside handle illumination light LH does not come on) B
      NG (Front door inside handle illumination light RH does not come on) C
      NG (Rear door inside handle illumination light LH does not come on)* D
      NG (Rear door inside handle illumination light RH does not come on)* E
      NG (All inside handle illumination lights do not come on) F

      • *: w/ Rear Door Inside Handle Illumination Light


    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    INSPECT NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH Click here

    D

    INSPECT NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY LH Click here

    E

    INSPECT NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH Click here

    F

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

    B

  2. INSPECT NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY LH


    1. Remove the front door inside handle illumination light LH (No. 1 interior illumination light assembly LH).

      Click here

    2. Inspect the front door inside handle illumination light LH (No. 1 interior illumination light assembly LH).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT DOOR INSIDE HANDLE ILLUMINATION LIGHT LH (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY LH) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY LH)


    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-26 - O14-2 (+) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the K53 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
      O14-1 (-) - K53-21 (LED2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. INSPECT NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH


    1. Remove the front door inside handle illumination light RH (No. 1 interior illumination light assembly RH).

      Click here

    2. Inspect the front door inside handle illumination light RH (No. 1 interior illumination light assembly RH).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT DOOR INSIDE HANDLE ILLUMINATION LIGHT RH (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH)


    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-26 - N14-2 (+) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the K53 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
      N14-1 (-) - K53-21 (LED2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY LH


    1. Remove the rear door inside handle illumination light LH (No. 2 interior illumination light assembly LH).

      Click here

    2. Inspect the rear door inside handle illumination light LH (No. 2 interior illumination light assembly LH).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR DOOR INSIDE HANDLE ILLUMINATION LIGHT LH (NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY LH) Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY LH)


    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-26 - Q4-2 (+) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the K53 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
      Q4-1 (-) - K53-21 (LED2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. INSPECT NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH


    1. Remove the rear door inside handle illumination light RH (No. 2 interior illumination light assembly RH).

      Click here

    2. Inspect the rear door inside handle illumination light RH (No. 2 interior illumination light assembly RH).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR DOOR INSIDE HANDLE ILLUMINATION LIGHT RH (NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH) Click here

    OK

  12. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH)


    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-26 - P4-2 (+) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK HARNESS AND CONNECTOR (NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the K53 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
      P4-1 (-) - K53-21 (LED2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. CHECK HARNESS AND CONNECTOR (POWER SOURCE - 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

  15. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    B006ZGDC17
    *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-26 - 3F-1*1 Always Below 1 Ω
      3B-26 - 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

  16. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - INTERIOR ILLUMINATION LIGHT ASSEMBLY)


    1. Disconnect the O14 front door inside handle illumination light LH (No. 1 interior illumination light assembly LH) connector.

    2. Disconnect the N14 front door inside handle illumination light RH (No. 1 interior illumination light assembly RH) connector.

    3. Disconnect the Q4 rear door inside handle illumination light LH (No. 2 interior illumination light assembly LH) connector.*

    4. Disconnect the P4 rear door inside handle illumination light RH (No. 2 interior illumination light assembly RH) connector.*

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-26 - O14-2 (+) Always Below 1 Ω
      3B-26 - N14-2 (+) Always Below 1 Ω
      3B-26 - Q4-2 (+)* Always Below 1 Ω
      3B-26 - P4-2 (+)* Always Below 1 Ω
      3B-26, O14-2 (+), N14-2 (+), Q4-2 (+)* or P4-2 (+)* - Body ground Always 10 kΩ or higher

      • *: w/ Rear Door Inside Handle Illumination Light

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. CHECK HARNESS AND CONNECTOR (INTERIOR ILLUMINATION LIGHT ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the K53 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
      O14-1 (-) - K53-21 (LED2) Always Below 1 Ω
      N14-1 (-) - K53-21 (LED2) Always Below 1 Ω
      Q4-1 (-) - K53-21 (LED2)* Always Below 1 Ω
      P4-1 (-) - K53-21 (LED2)* Always Below 1 Ω
      O14-1 (-), N14-1 (-), Q4-1 (-)*, P4-1 (-)* or K53-21 (LED2) - Body ground Always 10 kΩ or higher

      • *: w/ Rear Door Inside Handle Illumination Light

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR