Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Tundra. 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 ).

INSPECT CAN COMMUNICATION SYSTEM

Check if a CAN communication system DTC is output (See DIAGNOSTIC TROUBLE CODE TABLE ).

Result

RESULT TABLE

Result	Proceed to
DTC is not output	A
DTC is output	B

B: GO TO CAN COMMUNICATION SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go To Next Step

PERFORM ACTIVE TEST USING TECHSTREAM (VSC OFF INDICATOR LIGHT)

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

Select the Active Test mode and operate the VSC OFF indicator light using the Techstream.

ABS/VSC/TRAC

DIAGNOSTIC NOTE TABLE

Tester Display	Test Part	Control Range	Diagnostic Note
VSC Warning Light	VSC OFF indicator light	ON/OFF	Observe combination meter

Check that the VSC OFF indicator light turns on and off in the combination meter when using the Techstream.
OK: The VSC OFF indicator light turns on and off in accordance with the Techstream operation.

HINT:

When the VSC OFF indicator light remains illuminated, there may be an open in the wire harness of the combination meter or abnormalities in the meter circuit.

NG: GO TO METER/GAUGE SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )

OK: Go To Next Step

INSPECT VSC OFF SWITCH

Remove the VSC OFF switch (See REMOVAL ).

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Switch Condition	Specified Condition
6-9	Switch is pressed	Below 1 Ω
6-9	Switch is not pressed	10 kΩ or higher

Fig 1: Identifying VSC Off Switch Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE VSC OFF SWITCH (See REMOVAL )

OK: Go To Next Step

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)

Disconnect the A17 ECU connector.
Disconnect the J22 switch connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Condition	Specified Condition
A17-13 (CSW) - J22-9	Always	Below 1 Ω
A17-13 (CSW) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying A17 CSW Connector And J22 Switch Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE VSC ACTUATOR ASSEMBLY (See REMOVAL )