Lighting System Headlight Signal Circuit

Vehicle Exterior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Lighting (Ext). Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING GTS (HEADLIGHT)

INSPECT HEADLIGHT RELAY (H-LP LO OR H-LP LH)

CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT RELAY [H-LP LO OR H-LP LH])

CHECK HARNESS AND CONNECTOR (HEADLIGHT RELAY [H-LP LO OR H-LP LH] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])

INSPECT COWL SIDE JUNCTION BLOCK LH

LIGHTING SYSTEM - Headlight Signal Circuit


DESCRIPTION

The main body ECU receives a headlight low switch information signal from the light control switch, and illuminates the headlight low beam.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System.Lighting System Headlight Signal Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.
1.PERFORM ACTIVE TEST USING GTS (HEADLIGHT)

  1. Using the GTS, perform the Active Test (Click here).

    Main Body
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Headlight Relay
    		Headlight
    		ON or OFF
    		-
    OK:
    Headlight low beam turns on/turns off.


NG
Go to step 2
OK

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

2.INSPECT HEADLIGHT RELAY (H-LP LO OR H-LP LH)

  1. Inspect the headlight relay (Click here).



NG
REPLACE HEADLIGHT RELAY (H-LP LO OR H-LP LH)
OK


3.CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT RELAY [H-LP LO OR H-LP LH])


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System.Lighting System Headlight Signal Circuit

  1. Remove the headlight relay from the engine room relay block, junction block.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Headlight relay terminal 1 - Body ground
    		Always
    		11 to 14 V
    Headlight relay terminal 3 - Body ground
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Headlight Relay [H-LP LO or H-LP LH])


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (HEADLIGHT RELAY [H-LP LO OR H-LP LH] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])

  1. Remove the headlight relay from the engine room relay block, junction block.

  1. Disconnect the 2H cowl side junction block LH connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Headlight relay terminal 2 - 2H-30
    		Always
    		Below 1 Ω
    Headlight relay terminal 2 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.INSPECT COWL SIDE JUNCTION BLOCK LH
Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System.Lighting System Headlight Signal Circuit

  1. for LHD:

    1. Remove the cowl side junction block LH (Click here).

    2. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH (Click here).

  1. for RHD:

    1. Remove the cowl side junction block LH (Click here).

    2. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH (Click here).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A-15 (HRLY) - 2H-30
    		Always
    		Below 1 Ω
Result
Result
Result		Proceed to
OK (for LHD)
A
NG (for LHD)
B
NG (for RHD)
C
OK (for RHD)
D


B
REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)

C
REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)

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

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