Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Inspection Procedure
- CHECK FOR DTC
- Turn the ignition switch ON.
- Check that the VSC OFF indicator light turns on.
- Check for DTC (see DTC CHECK / CLEAR
).
Result
RESULT CHARTResult Proceed to DTC is not output A DTC is output B
B: REPAIR CIRCUITS INDICATED BY OUTPUT
A: Go to Next Step
- INSPECT VSC OFF SWITCH
- Remove the VSC OFF switch
- Measure the resistance of the switch.
Standard resistance
DIAGNOSTIC NOTE CHARTTester Connection Switch Condition Specified Condition 1 - 2 Pushed Below 1Ω 1 - 2 Released 10 kΩ or higher NG: REPLACE VSC OFF SWITCH
OK: Go to Next Step
- CHECK WIRE HARNESS (VSC OFF SWITCH - SKID CONTROL ECU AND BODY GROUND)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the V7 switch connector.
- Disconnect the S6 ECU connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Specified Condition S6-12 (CSW) - V7-2 Below 1 Ω S8-12 (CSW) - Body ground 10 kΩ or higher V7-1 - Body ground Below 1Ω
Result
RESULT CHARTResult Proceed to Display is not NORMAL A Display is NORMAL B - CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY AND BODY GROUND)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the S5, S7 and S8 ECU connectors.
- Turn the ignition switch ON.
- Measure the voltage of the wire harness side connectors.
Standard voltage
TESTER CONNECTION SPECIFIED CONDITION VOLTAGE CHARTTester Connection Specified Condition S7-6 (IG1) - S5-16 (GND4) 10 to 14 V S7-6 (IG1) - S5-22 (GND3) 10 to 14 V S7-6 (IG1) - S8-6 (GND2) 10 to 14 V S7-6 (IG1) - S8-31 (GND1) 10 to 14 V S7-6 (IG1) - Body ground 10 to 14 V - Measure the resistance of the wire harness side connectors.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION RESISTANCE CHARTTester Connection Specified Condition S5-16 (GND4) - Body ground Below 1 Ω S5-22 (GND3) - Body ground Below 1 Ω S8-6 (GND2) - Body ground Below 1 Ω S8-31 (GND1) - Body ground Below 1 Ω
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to Next Step
- CHECK MULTIPLEX COMMUNICATION SYSTEM (SKID CONTROL ECU - COMBINATION METER)
- Check for open and short circuits in the multiplex communication system between the skid control ECU and combination meter.
NG: REPAIR OR REPLACE MULTIPLEX COMMUNICATION SYSTEM
OK: Go to Next Step
- CHECK COMBINATION METER (VSC OFF INDICATOR LIGHT)
- Check the combination meter (see PROBLEM SYMPTOMS TABLE ).
NG: REPAIR OR REPLACE COMBINATION METER
OK: REPLACE SKID CONTROL ECU
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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