LIGHTING SYSTEM > Taillight Relay Circuit

for Preparation Click here


DESCRIPTION

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

WIRING DIAGRAM


B113755E01


B113756E01


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

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

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

    BODY NO.1 
    Item
    		Test Details
    		Diagnostic Note
    Taillight Relay
    		Turn Tail 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 TAIL fuse in the instrument panel junction block assembly.

    Resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


3.INSPECT RELAY


    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 condition
      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.


    E068612E10

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    1C-4 - Body ground
    		Light control switch OFF → TAIL
    		Below 1 V → 10 to 14 V
    1D-6 - Body ground
    		Light control switch OFF → TAIL
    		Below 1 V → 10 to 14 V
    1P-8 - 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


6.INSPECT REAR JUNCTION BLOCK


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


    E068636E01

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    5C-15 - Body ground
    		Light control switch OFF → TAIL
    		Below 1 V → 10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - REAR JUNCTION BLOCK)
OK


7.INSPECT REAR JUNCTION BLOCK


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


    E068636E02

    Voltage:
    Tester connection
    		Condition
    		Specified condition
    5C-16 - Body ground
    		Headlight dimmer switch OFF → TAIL
    		Below 1 V → 10 to 14 V
    5D-5 - Body ground
    		Headlight dimmer switch OFF → TAIL
    		Below 1 V → 10 to 14 V
    5D-9 - Body ground
    		Headlight dimmer switch OFF → TAIL
    		Below 1 V → 10 to 14 V
    5D-10 - Body ground
    		Headlight dimmer switch OFF → TAIL
    		Below 1 V → 10 to 14 V
    5D-11 - Body ground
    		Headlight dimmer switch OFF → TAIL
    		Below 1 V → 10 to 14 V



NG
REPLACE REAR JUNCTION BLOCK
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR