Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When replacing the VSC actuator assembly, perform zero point calibration (See CALIBRATION ).

PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER)

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream ON.

Select the Active Test mode and operate the skid control buzzer using the Techstream.

ABS/VSC/TRAC

DATA LIST REFERENCE

Tester Display	Test Part	Control Range	Diagnostic Note
Buzzer	Skid control buzzer	Buzzer ON/OFF	Buzzer can be heard

Check that the buzzer sounds/stops when turning the skid control buzzer on/off by using the Techstream.

Result

RESULT REFERENCE

Result	Proceed to
Buzzer does not sound or sounds constantly	A
Buzzer sounds/stops	B

B: REPLACE VSC ACTUATOR ASSEMBLY (See REMOVAL )

A: Go to Next Step

INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)

Disconnect the H5 buzzer connector.
Turn the ignition switch to ON.

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

Standard Voltage

VOLTAGE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
H5-1 - Body ground	Ignition switch ON	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Fig 1: Identifying H5 Buzzer Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

INSPECT SKID CONTROL BUZZER
1. Disconnect the H5 buzzer connector.
2. Apply battery negative voltage to terminal 1, and battery positive voltage to terminal 2 of the skid control buzzer, and then check that the buzzer sounds.
  OK: Skid control buzzer sounds.
NG: REPLACE SKID CONTROL BUZZER ASSEMBLY (See REMOVAL )

Fig 2: Identifying Skid Control Buzzer Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER)

Disconnect the A19 ECU connector.

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

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
A19-8 (BZ) - H5-2	Always	Below 1 Ω
A19-8 (BZ) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 3: Identifying A19 ECU Connector Terminal

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND)

Disconnect the A19 ECU connector.

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

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
A19-1 (GND1) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 4: Identifying A19 ECU Connector Terminal

OK: REPLACE VSC ACTUATOR ASSEMBLY (See REMOVAL )