NAVIGATION SYSTEM > Illumination Circuit

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DESCRIPTION

Power is supplied to the multi-display switch illumination when the light control switch is in the TAIL or HEAD position.

WIRING DIAGRAM


E111724E03


INSPECTION PROCEDURE

1.CHECK ILLUMINATION

  1. Check if the illumination for the multi-display, radio receiver, headlight cleaner switch, glove box or others (seat heater switch, cigarette lighter, etc.) comes on when the light control switch is turned to the HEAD or TAIL position.

    RESULT:

    Condition
    		Proceed to
    Illumination comes on for components except multi-display
    		A
    Illumination comes on only for glove box and steering pad switch
    		B
    No illumination comes on (multi-display, glove box, cigarette lighter, etc.)
    		C



B
Go to step 4

C
GO TO LIGHTING SYSTEM
A


2.INSPECT MULTI-DISPLAY


    E111725E06

  1. Disconnect the multi-display connector M1.

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

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    ILL+ - Body ground
    		Light control SW HEAD or TAIL
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMBINATION METER)


    E111726E02

  1. Disconnect the multi-display connectors M1 and M2 and combination meter connector C8.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    ILL- (M1-2) - C8-2
    		Always
    		Below 1 Ω
    ILL- (M2-5) - C8-2
    		Always
    		Below 1 Ω
    ILL- (M1-2) - Body ground
    		Always
    		10 kΩ or higher
    ILL- (M2-5) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL 

4.CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMBINATION METER)


    E111726E02

  1. Disconnect the multi-display connectors M1 and M2 and combination meter connector C8.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    ILL- (M1-2) - C8-2
    		Always
    		Below 1 Ω
    ILL- (M2-5) - C8-2
    		Always
    		Below 1 Ω
    ILL- (M1-2) - Body ground
    		Always
    		10 kΩ or higher
    ILL- (M2-5) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

GO TO COMBINATION METER SYSTEM