LIGHTING SYSTEM > Rear Fog Light Circuit

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DESCRIPTION

The main body ECU (multiplex network body ECU) controls the rear fog light relay.

WIRING DIAGRAM


E191587E10


E191587E11


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

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

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

  1. Check that the relay operates.

    Main Body 
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Rear Fog Light Relay
    		Rear fog light relay
    		ON/OFF
    		Light control switch is in head position

    OK:
    Rear fog light relay operates. (Rear fog light comes on.)



NG
Go to step 2
OK

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

2.INSPECT REAR FOG LIGHT RELAY


    B060778E87

  1. Remove the rear fog light relay from the No. 4relay block.

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

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



NG
REPLACE REAR FOG LIGHT RELAY
OK


3.CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - REAR FOG LIGHT RELAY)

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Relay terminal 2 - Body ground
    		Light control switch off → tail
    		Below 1 V → 11 to 14 V
    Relay terminal 5 - Body ground
    		Always
    		11 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT RELAY - REAR FOG LIGHT ASSEMBLY)

  1. Disconnect the V9 or V2 rear fog light assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Relay Terminal 3 - V9-4
    		Always
    		Below 1 Ω
    Relay Terminal 3 - V2-4
    		Always
    		Below 1 Ω
    Relay Terminal 3 - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT RELAY - INSTRUMENT PANEL JUNCTION BLOCK)

  1. Disconnect the 2B instrument panel junction block assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Relay terminal 1 - 2B-26
    		Always
    		Below 1 Ω
    2B-26 - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    E182487E15

  1. Remove the instrument panel junction block assembly.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2B-26 - A-27 (RFGO)
    		Always
    		Below 1 Ω
    2B-26 - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *a
    		Component without harness connected
    (Instrument Panel Junction Block Assembly)



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK

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