Lighting System Rear Fog Light Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (REAR FOG LIGHT RELAY)

INSPECT REAR FOG LIGHT RELAY (FOG RR)

CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT RELAY [FOG RR] - BATTERY)

CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT RELAY [FOG RR] - MAIN BODY ECU)

INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

LIGHTING SYSTEM - Rear Fog Light Circuit


DESCRIPTION

The main body ECU receives headlight dimmer switch information signals and illuminates the rear fog lights.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Lighting (Ext).Lighting System.Lighting System Rear Fog Light 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 INTELLIGENT TESTER (REAR FOG LIGHT RELAY)

  1. Using the intelligent tester, perform the Active Test (LandCruiser RM000000PKV0J6X.html).

    Main Body
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Rear Fog Light Relay
    		Rear fog light relay
    		ON/OFF
    		The headlight dimmer switch is in the tail position.
    OK:
    Rear fog light relay operates (rear fog lights come on).


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM000002CE20QHX.html)

2.INSPECT REAR FOG LIGHT RELAY (FOG RR)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Lighting (Ext).Lighting System.Lighting System Rear Fog Light Circuit

  1. Remove the rear fog light relay from the engine room relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		Battery voltage not applied between terminals 1 and 2
    		10 kΩ or higher
    Battery voltage applied between terminals 1 and 2
    		Below 1 Ω


NG
REPLACE REAR FOG LIGHT RELAY
OK


3.CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT RELAY [FOG RR] - BATTERY)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Lighting (Ext).Lighting System.Lighting System Rear Fog Light Circuit

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Rear fog light relay terminal 5 - Body ground
    		Always
    		11 to 14 V
    Rear fog light relay terminal 2 - Body ground
    		Headlight dimmer switch off
    		Below 1 V
    Headlight dimmer switch tail
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Rear Fog Light Relay)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT RELAY [FOG RR] - MAIN BODY ECU)

  1. Remove the main body ECU (LandCruiser RM000003WBO05FX.html).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Rear fog light relay terminal 1 - A-27 (RFGO)
    		Always
    		Below 1 Ω
    A-27 (RFGO) - Body ground
    		Always
    		10 kΩ or higher


NG
Go to step 5
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (LandCruiser RM000003WBO05FX.html)

5.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Lighting (Ext).Lighting System.Lighting System Rear Fog Light Circuit

  1. Remove the driver side junction block assembly (LandCruiser RM000003WBO05FX.html).

  1. Remove the main body ECU from the driver side junction block assembly (LandCruiser RM000003WBO05FX.html).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2F-19 - A-27
    		Always
    		Below 1 Ω


NG
REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY (LandCruiser RM000003WBO05FX.html)
OK

REPAIR OR REPLACE HARNESS AND CONNECTOR