LIGHTING SYSTEM Interior Light Switch Signal Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the interior light door switch and interior light on/off switch.

WIRING DIAGRAM

A01NFX6E01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Data List.

    5. Read the display on the intelligent tester.

      Body (Main Body ECU RH)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Dome Light DOOR SW Interior light door switch signal/ON or OFF

      ON: Interior light door switch not pushed

      OFF: Interior light door switch pushed

      		 -
      Dome Light SW Interior light on/off switch signal/ON or OFF

      ON: Interior light on/off switch pushed

      OFF: Interior light on/off switch not pushed

      		 -
      OK
      Switch condition can be displayed.
      Result
      Result Proceed to
      Interior light door switch does not operate A
      Interior light on/off switch does not operate B
      Both interior light door switch and on/off switch do not operate C
      OK D

    A

    INSPECT MAP LIGHT ASSEMBLY Click here

    B

    INSPECT MAP LIGHT ASSEMBLY Click here

    C

    INSPECT MAP LIGHT ASSEMBLY Click here

    D

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

  2. INSPECT MAP LIGHT ASSEMBLY


    1. A01NHFEE01
      Text in Illustration
      *1

      Component without harness connected:

      (Map Light Assembly)

      Remove the map light assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      18 (DOOR) - 40 (GND) Interior light door switch pushed 10 kΩ or higher
      Interior light door switch not pushed Below 1 Ω

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU)


    1. A01NH2GE01
      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 (Multiplex Network Body ECU))

      Disconnect the T10 map light assembly connector.

    2. Disconnect the F14 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T10-18 (DOOR) - F14-25 (DMDR) Always Below 1 Ω
      T10-18 (DOOR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

  4. INSPECT MAP LIGHT ASSEMBLY


    1. A01NHFEE02
      Text in Illustration
      *1

      Component without harness connected:

      (Map Light Assembly)

      Remove the map light assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      17 (CILL) - 40 (GND) Interior light on/off switch not pushed 10 kΩ or higher
      Interior light on/off switch pushed Below 1 Ω

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU)


    1. A01NH2GE02
      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 (Multiplex Network Body ECU))

      Disconnect the map light assembly connector.

    2. Disconnect the main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T10-17 (CILL) - F14-26 (DMON) Always Below 1 Ω
      T10-17 (CILL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

  6. INSPECT MAP LIGHT ASSEMBLY


    1. A01NHFEE03
      Text in Illustration
      *1

      Component without harness connected:

      (Map Light Assembly)

      Remove the map light assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      18 (DOOR) - 40 (GND) Interior light door switch pushed 10 kΩ or higher
      Interior light door switch not pushed Below 1 Ω
      17 (CILL) - 40 (GND) Interior light on/off switch not pushed 10 kΩ or higher
      Interior light on/off switch pushed Below 1 Ω

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAP LIGHT ASSEMBLY - BODY GROUND)