Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: VSC Buzzer Circuit

DESCRIPTION

The skid control ECU (brake actuator assembly) 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 brake actuator assembly has increased excessively due to continuous operation of AUTO LSD.
  • Sounds intermittently to inform the driver that the VSC is operating.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform the zero point calibration (See page ). PROCEDURE ).

PROCEDURE

1.

CHECK CAN COMMUNICATION LINE

(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

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)

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 BRAKE ACTUATOR ASSEMBLY

B

END

TC and CG Terminal Circuit
DESCRIPTION Connecting terminals TC and CG of the DLC3 causes the ECU to display the DTC by blinking the ABS warning light and slip indicator light. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTI ...

TS and CG Terminal Circuit
DESCRIPTION In Test Mode (signal check), a malfunction in the speed sensor that cannot be detected when the vehicle is stopped can be detected while driving. Sensor check mode can be entered by co ...

Other materials:

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: The wireless door lock control system troubleshooting procedure is based on the premise that the power door lock control system is operating normally. Check the power door lock control system first before troubleshooting the wireless door lock cont ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...

ECM Communication Circuit Malfunction (C1203)
DESCRIPTION The circuit is used to send TRAC and VSC control information from the skid control ECU (brake actuator assembly) to the ECM, and engine control information from the ECM to the skid control ECU (brake actuator assembly) through the CAN communication system. for 4WD or w/ Rear Diff ...

В© 2011-2018 Copyright www.ttguide.net