Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Taillight Relay Circuit

DESCRIPTION

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration (See page ).*1
    • *1: w/ Smart Key System

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (TAILLIGHT RELAY)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

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

(e) Perform the Active Test according to the display on the Techstream.

Main Body

Tester Display

Test Part

Control Range

Diagnostic Note

Taillight Relay

Taillight relay

ON/OFF

-

OK:

Taillight relay operates. (Taillights illuminate.)

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK HARNESS AND CONNECTOR (BATTERY - DRIVER SIDE JUNCTION BLOCK)

(a) Disconnect the 1K driver side junction block connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

1K-1 - Body ground

Always

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT DRIVER SIDE JUNCTION BLOCK

(a) Remove the driver side junction block (See page (b) Remove the main body ECU (multiplex network body ECU) from the driver side ).

(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block.

Text in Illustration

*a

Component without harness connected

(Driver Side Junction Block)

-

-

(c) Connect a positive (+) lead from the battery to terminal 1K-1.

(d) Connect a negative (-) lead from the battery to terminal MB-14 (TRLY).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

1F-3 - Battery negative terminal

Always

11 to 14 V

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE DRIVER SIDE JUNCTION BLOCK

Engine Switch Illumination Circuit
DESCRIPTION The illuminated entry system controls the engine switch illumination. WIRING DIAGRAM PROCEDURE 1. READ VALUE USING TECHSTREAM (POWER/ENGINE SW LIGHT) ...

Cargo Light Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) receives a cargo light information signal from the deck light switch assembly and door courtesy light switch, and illuminates the cargo ...

Other materials:

Outside rear view mirrors
Mirror angle can be adjusted. Power-adjustable type   Select a mirror to adjust. (L: left or R: right) Adjust the mirror up, down, in or out using the switch. Manually adjustable type Adjust the mirror up, down, in or out by pushing the mirror surface. Folding back the mirrors ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT REFRIGERANT PRESSURE (a) This method uses a refrigerant recovery unit set to locate problem areas. Read the refrigerant pressure when the test conditions are established. Test conditions: Temperature at the air inlet with the air recirculation ...

Removal
REMOVAL PROCEDURE 1. REMOVE FRONT DOOR SCUFF PLATE LH (for Double Cab) Click here 2. REMOVE FRONT DOOR SCUFF PLATE LH (for Access Cab) Click here 3. REMOVE COWL SIDE TRIM BOARD LH Click here 4. REMOVE INSTRUMENT CLUSTER CENTER FINISH PANEL SUB-ASSEMBLY Click here 5. REMOVE INSTRUME ...

В© 2011-2021 Copyright www.ttguide.net