Taillight Relay Circuit

LIGHTING (EXT): LIGHTING SYSTEM: Taillight Relay Circuit
- Taillight Relay Circuit

DESCRIPTION

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

WIRING DIAGRAM

1. for LED Headlight:





2. except LED Headlight:





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Check that the relay operates.

Main Body





OK:

Taillight relay operates. (Taillights illuminate.)

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

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System

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

(a) Disconnect the 2E instrument panel junction block assembly connector.





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

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.





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

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

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

Standard Voltage:





Text in Illustration





NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal