Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: VSC Buzzer Circuit

DESCRIPTION

The skid control ECU (master cylinder solenoid) is connected to the combination meter via CAN communication.

The combination meter has a built-in VSC warning buzzer:

  • Sounds intermittently to inform the driver if the temperature of hydraulic brake booster has increased excessively due to continuous operation of TRAC, A-TRAC and AUTO LSD.
  • Sounds intermittently to inform the driver that the VSC is operating.
  • Sounds continuously to alert the driver that the hydraulic pressure of accumulator in the hydraulic brake booster has decreased.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (master cylinder solenoid), perform the zero point calibration (See page ). PROCEDURE ).

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus (See page OK: OK: ).

OK:

CAN Bus Check indicates no malfunctions in CAN communication.

NG

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

OK

2.

PERFORM ACTIVE TEST USING TECHSTREAM (BUZZER)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.

(e) According to the display on the tester, perform the Active Test.

ABS/VSC/TRAC

Tester Display

Test Part

Control Range

Diagnostic Note

Buzzer

VSC warning buzzer

Buzzer OFF/ON

The buzzer can be heard

(f) Check that the buzzer sounds or stops in accordance with the Techstream.

Result

Result

Proceed to

Buzzer does not sound or stop

A

Buzzer sounds and stops

B

B

USE SIMULATION METHOD TO CHECK

A

3.

REPLACE COMBINATION METER ASSEMBLY

(a) Turn the ignition switch off.

(b) Replace the combination meter (See page ). ).

NEXT

4.

PERFORM ACTIVE TEST USING TECHSTREAM (BUZZER)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.

(e) According to the display on the tester, perform the Active Test.

ABS/VSC/TRAC

Tester Display

Test Part

Control Range

Diagnostic Note

Buzzer

VSC warning buzzer

Buzzer OFF/ON

The buzzer can be heard

(f) Check that the buzzer sounds or stops in accordance with the Techstream.

Result

Result

Proceed to

Buzzer does not sound or stop

A

Buzzer sounds and stops

B

A

REPLACE MASTER CYLINDER SOLENOID

B

END

A-TRAC Indicator Light Remains ON
DESCRIPTION This is the A-TRAC main switch circuit. When the A-TRAC switch is turned on with the transfer in L4, the A-TRAC function is available and the A-TRAC indicator light illuminates. WIRI ...

Vehicle Stability Control System(for Vacuum Brake Booster)
...

Other materials:

Four-wheel drive system
Use the front-wheel drive control switch to select the following transfer modes. H2 (high speed position, two-wheel drive) Use this for normal driving on dry hard-surfaced roads. This position gives greater economy, quietest ride and least wear. H4 (high speed position, four-wheel drive) ...

Power Outlet Socket(for Front Side)
Components COMPONENTS ILLUSTRATION Removal REMOVAL PROCEDURE 1. REMOVE INSTRUMENT PANEL LOWER CENTER FINISH PANEL (See page ) 2. REMOVE NO. 1 POWER OUTLET SOCKET ASSEMBLY (a) Using a screwdriver with its tip wrapped in protective tape, disengage the 2 claws to remove t ...

Rear Door(for Access Cab)
Adjustment ADJUSTMENT CAUTION / NOTICE / HINT HINT: Use the same procedures for both the LH and RH sides. The procedure described below is for the LH side. Centering bolts are used to mount the door hinge to the vehicle body and door. The door cannot be adjusted with the ce ...

В© 2011-2019 Copyright www.ttguide.net