LIGHTING SYSTEM > Illumination Circuit

for Preparation Click here


DESCRIPTION

The main body ECU receives information regarding the door courtesy switch and door lock position switch, and turns on the map light assembly.

WIRING DIAGRAM


E177319E01


INSPECTION PROCEDURE

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

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ILLUMINATED ENTRY SYSTEM)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Turn the room light switch to the DOOR position.

  1. All doors closed (door courtesy switches OFF).

  1. Enter the following menus: Body / Main Body / Active Test.

  1. According to the display on the tester, perform the Active Test.

    Main Body 
    Tester Display
    		Test Part
    		Control Range
    		Normal Condition
    Illuminated Entry System
    		Map light assembly
    		ON/OFF
    		-

    OK:
    The illuminated entry system operates normally when operating it through the intelligent tester.



NG
Go to step 2
OK

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

2.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - BATTERY AND BODY GROUND)


    E174440E01

  1. Disconnect the H1 map light assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    H1-3 (B) - Body ground
    		Map light switch in ON position
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H1-5 (E) - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Map Light Assembly)

  1. Reconnect the map light assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT MAP LIGHT ASSEMBLY


    B214173E01

  1. Remove the map light assembly.

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

    Standard Resistance:
    DC 13.5 V 
    Tester Connection
    		Switch Condition
    		Specified Condition
    3 (B) - 1 (CTY)
    3 (B) - 5 (E)
    		OFF
    		10 kΩ or higher
    3 (B) - 1 (CTY)
    		DOOR
    		Below 400 Ω
    3 (B) - 5 (E)
    		ON
    		Below 400 Ω

    Text in Illustration 
    *1
    		Component without harness connected
    (Map Light Assembly)

  1. Reinstall the map light assembly.



NG
REPLACE MAP LIGHT ASSEMBLY (Click here)
OK


4.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - MAP LIGHT ASSEMBLY)


    E174439E01

  1. Disconnect the 3C instrument panel junction block connector.

  1. Disconnect the map light assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3C-12 - H1-1 (CTY)
    		Always
    		Below 1 Ω
    3C-12 or H1-1 (CTY) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Instrument Panel Junction Block)
    *2
    		Front view of wire harness connector
    (to Map Light Assembly)

  1. Reconnect the instrument panel junction block connector.

  1. Reconnect the map light assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE MAIN BODY ECU

  1. Temporarily replace the main body ECU with a new or normally functioning one (Click here).


NEXT


6.CHECK ILLUMINATED ENTRY SYSTEM

  1. Check if the illuminated entry system operates correctly (Click here).

    OK:
    System operates correctly.



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK
OK

END (MAIN BODY ECU IS DEFECTIVE)