LIGHTING SYSTEM > Room Light Circuit

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DESCRIPTION

The cowl side junction block ECU LH receives information regarding the door courtesy switch, door lock position switch, engine switch, and turns on the front room light.

WIRING DIAGRAM


E109565E02


E109566E02


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the room light illuminates.

    Cowl side junction block ECU LH:

    Item
    		Test Details
    		Diagnostic Note
    Seat Light operation
    		Seat light operation ON / OFF
    		-
    Shift Light operation
    		Shift light operation ON / OFF
    		-



NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

2.CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK ECU LH - MAP LIGHT ASSEMBLY)


    E108577E03

  1. Disconnect the W1 junction block connector.

  1. Disconnect the Y6 overhead junction block connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    W1-3 (RCTY) - Y6-27 (SHFT)
    		Below 1 Ω
    W1-2 (ILE) - Y6-30 (CTY)
    		Below 1 Ω
    W1-3 (RCTY) or Y6-27 (SHFT) - Body ground
    		10 kΩ or higher
    W1-2 (ILE) or Y6-30 (CTY) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.INSPECT FUSE (DOME, D/C CUT)

  1. Remove the DOME and D/C CUT fuses from the engine room No. 1 relay block.

  1. Measure the resistance of the fuses.

    Standard resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


4.CHECK WIRE HARNESS (MAP LIGHT ASSEMBLY - BATTERY)


    E108578E10

  1. Disconnect the Y6 map light connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    Y6-1 (+B1) - Body ground
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.CHECK WIRE HARNESS (MAP LIGHT ASSEMBLY - BODY GROUND)


    E108578E08

  1. Disconnect the Y6 map light connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    Y6-31 (GND3) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


6.CHECK WIRE HARNESS (MAP LIGHT ASSEMBLY - ROOM LIGHT)

E108576E06

  1. Disconnect the Y6 map light connector.

  1. Disconnect the Y10 room light connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:

    Tester Connection
    		Specified Condition
    Y6-32 (RGND) - Y10-6 (RGND)
    		Below 1 Ω
    Y6-8 (RLSW) - Y10-4 (RLSW)
    		Below 1 Ω
    Y6-25 (RRSW) - Y10-1 (RRSW)
    		Below 1 Ω
    Y6-7 (RLMP) - Y10-3 (RLMP)
    		Below 1 Ω
    Y6-24 (RRMP) - Y10-2 (RRMP)
    		Below 1 Ω
    Y6-23 (RILL) - Y10-7 (RILL)
    		Below 1 Ω
    Y6-22 (LILL) - Y10-8 (LILL)
    		Below 1 Ω
    Y6-6 (ILLB) - Y10-5 (ILLB)
    		Below 1 Ω
    Y6-32 (RGND) or Y10-6 (RGND) - Body ground
    		10 kΩ or higher
    Y6-8 (RLSW) or Y10-4 (RLSW) - Body ground
    		10 kΩ or higher
    Y6-25 (RRSW) or Y10-1 (RRSW) - Body ground
    		10 kΩ or higher
    Y6-7 (RLMP) or Y10-3 (RLMP) - Body ground
    		10 kΩ or higher
    Y6-24 (RRMP) or Y10-2 (RRMP) - Body ground
    		10 kΩ or higher
    Y6-23 (RILL) or Y10-7 (RILL) - Body ground
    		10 kΩ or higher
    Y6-22 (LILL) or Y10-8 (LILL) - Body ground
    		10 kΩ or higher
    Y6-6 (ILLB) or Y10-5 (ILLB) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


7.REPLACE ROOM LIGHT

  1. Temporarily replace the room light with a new or normally functioning one.

  1. Check that the light illuminates.

    OK:
    Room light illuminates.



OK
END
NG

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE