LIGHTING SYSTEM Illumination Circuit

DTC Code DTC Name
Illumination Circuit

DESCRIPTION

The main body ECU receives information regarding all the door courtesy light switches and door lock position switches, and turns on the room lights.

WIRING DIAGRAM

E272582E02

CAUTION / NOTICE / HINT

Tip:

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

PROCEDURE

  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Turn the map light switch to the DOOR position.

    5. Close all the doors (all door courtesy light switches turn off).

    6. Enter the following menus: Body / Main Body / Active Test / Illuminated Entry System.

    7. Use the Active Test to check the operation of the illuminated entry system.

      Table 1. Main Body

      Tester Display

      Test Part

      Control Range

      Diagnostic Note

      Illuminated Entry System

      All parts illuminated by illuminated entry system

      ON/OFF

      -

      OK

      The illuminated entry system operates normally when operating it using the Active Test.

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

  2. INSPECT MAP LIGHT ASSEMBLY

    1. E269516E01

      Remove the map light assembly (Click here).

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      7 (+B1) - 6 (CTY)

      Map light switch off

      Door switch not in door position

      10 kΩ or higher

      7 (+B1) - 6 (CTY)

      Map light switch off

      Door switch in door position

      Below 1 Ω

      7 (+B1) - 2 (GND)

      Map light switch off

      Door switch in on position

      Below 1 Ω

      7 (+B1) - 2 (GND)

      Map light switch off

      Door switch not in on position

      10 kΩ or higher

      7 (+B1) - 2 (GND)

      Map light switch on

      Below 1 Ω

      7 (+B1) - 3 (RRMP)

      Map light switch on

      Door switch not in on position

      10 kΩ or higher

      7 (+B1) - 3 (RRMP)

      Map light switch off

      Door switch not in on position

      Below 1 Ω

    REPLACE MAP LIGHT ASSEMBLY

    (Click here)

  3. CHECK HARNESS AND CONNECTOR (MAP LIGHT - MAIN BODY ECU, BATTERY AND BODY GROUND)

    1. U124041E02

      Disconnect the DK main body ECU connector.

    2. Disconnect the Q10 map light connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      Q10-7 (+B1) - Body ground

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

      11 to 14 V

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Q10-6 (CTY) - DK-2 (ILE)

      Always

      Below 1 Ω

      Q10-6 (CTY) - Body ground

      Always

      10 kΩ or higher

      Q10-2 (GND) - Body ground

      Always

      Below 1 Ω
      Table 2. Text in Illustration

      *1

      Front view of wire harness connector

      (to Map Light Assembly)

      *2

      Front view of wire harness connector

      (to Main Body ECU)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT NO. 1 ROOM LIGHT ASSEMBLY

    1. E178951E05

      Remove the No. 1 room light assembly (Click here).

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      4 (B) - 3 (E)

      Off

      10 kΩ or higher

      4 (B) - 2 (CTY)

      Off

      Below 1 Ω

      4 (B) - 3 (E)

      On

      Below 1 Ω

      4 (B) - 2 (CTY)

      On

      10 kΩ or higher

    REPLACE NO. 1 ROOM LIGHT ASSEMBLY

    (Click here)

  5. CHECK HARNESS AND CONNECTOR (NO. 1 ROOM LIGHT - MAP LIGHT, BATTERY AND BODY GROUND)

    1. U124042E02

      Disconnect the Q10 map light connector.

    2. Disconnect the Q8 No. 1 room light connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      Q8-4 (B) - Body ground

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

      11 to 14 V

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Q8-2 (CTY) - Q10-3 (RRMP)

      Always

      Below 1 Ω

      Q8-2 (CTY) - Body ground

      Always

      10 kΩ or higher

      Q8-3 (E) - Body ground

      Always

      Below 1 Ω
      Table 3. Text in Illustration

      *1

      Front view of wire harness connector

      (to Map Light Assembly)

      *2

      Front view of wire harness connector

      (to No. 1 Room Light Assembly)

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPAIR OR REPLACE HARNESS OR CONNECTOR