LIGHTING SYSTEM > Front Fog Light Circuit

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DESCRIPTION

The body ECU controls FOG relay when signal is received from headlight dimmer switch assembly.

WIRING DIAGRAM


B110600E02


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Connect the intelligent tester to DLC3.

  1. Turn the ignition switch to the ON position and press the intelligent tester main switch ON.

  1. Select the item below in the ACTIVE TEST and then check that the relay operates.

    BODY NO.1 
    Item
    		Test Details
    		Diagnostic Note
    Front Fog Light Relay
    		Turn Front fog light relay ON/OFF
    		-



NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

2.INSPECT FUSE

  1. Inspect the FR FOG fuse and TAIL fuse in the instrument panel junction block assembly.

    Resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


3.INSPECT RELAY


    B016200

  1. Inspect fog light relay continuity.

    1. Remove the fog light relay from the instrument panel J/B assembly.

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

      Resistance:
      Tester connection
      		Condition
      		Specified resistance
      3 - 5
      		Always
      		10 kΩ or higher
      3 - 5
      		Apply B+ between the terminal 1 and 2
      		Below 1 Ω



    B016200

  1. Inspect tail relay continuity.

    1. Remove the tail relay from the instrument panel J/B assembly.

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

      Resistance:
      Tester connection
      		Condition
      		Specified resistance
      3 - 5
      		Always
      		10 kΩ or higher
      3 - 5
      		Apply B+ between the terminal 1 and 2
      		Below 1 Ω



NG
REPLACE RELAY
OK


4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE CIRCUIT)


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


    E068612E03

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1A-1 - Body ground
    		Always
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
OK


5.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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


    E068612E06

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1C-1 - Body ground
    		Light control switch TAIL and Front fog light switch OFF → ON
    		Below 1 V → 10 to 14 V
    1D-5 - Body ground
    		Light control switch TAIL and Front fog light switch OFF → ON
    		Below 1 V → 10 to 14 V



NG
Go to step 6
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR 

6.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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


    E068612E07

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1L-3 - Body ground
    		Light control switch OFF → TAIL
    		Below 1 V → 10 to 14 V



NG
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
OK


7.CHECK HARNESS AND CONNECTOR


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


    E068612E07

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1L-4 - Body ground
    		Light control switch OFF → TAIL
    		Below 1 V → 10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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


    E068613E02

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1I-8 - Body ground
    		Light control switch OFF → TAIL
    		Below 1 V → 10 to 14 V



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK


9.CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - INSTRUMENT PANEL JUNCTION BLOCK)

  1. Disconnect the B7 connector of multiplex network body ECU and the 1I connector of the instrument panel junction block assembly.



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


    E068613E11

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    B4-7 - 1I-8
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE