LIGHTING SYSTEM > Taillight Relay Circuit

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DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay.

WIRING DIAGRAM


for LED Headlight:

E224179E03


except LED Headlight:

E224179E04


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
    Taillight Relay
    		Taillight relay
    		ON/OFF
    		-

    OK:
    Taillight relay operates. (Taillights illuminate.)



NG
Go to step 2
OK

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

2.CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    E224484E01

  1. Disconnect the 2E instrument panel junction block assembly connector (for LHD).

  1. Disconnect the 2F instrument panel junction block assembly connector (for RHD).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    2E-1 - Body ground
    		Power switch off
    		11 to 14 V
    2F-1 - Body ground
    		Power switch off
    		11 to 14 V

    Text in Illustration 
    *A
    		for LHD
    *B
    		for RHD
    *a
    		Front view of wire harness connector
    (to Instrument Panel Junction Block Assembly)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


  1. Remove the instrument panel junction block assembly.


    E224181E01

  1. Connect a positive (+) lead from the auxiliary battery to terminal 2E-1 (for LHD).

  1. Connect a positive (+) lead from the auxiliary battery to terminal 2F-1 (for RHD).

  1. Connect a negative (-) lead from the auxiliary battery to terminal A-14.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    2C-10 - Auxiliary battery negative
    		Power switch off
    		11 to 14 V
    2D-18 - Auxiliary battery negative
    		Power switch off
    		11 to 14 V

    Text in Illustration 
    *A
    		for LHD
    *B
    		for RHD
    *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)