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.
Diagnosis Procedure
- CHECK VDC OFF SWITCH CIRCUIT
- Turn the ignition switch OFF.
- Disconnect ABS actuator and electric unit (control unit) harness connector.
- Disconnect VDC OFF switch harness connector.
- Check the continuity between ABS actuator and electric unit (control unit) harness connector and VDC OFF switch harness connector.
ABS actuator and electric unit (control unit) VDC OFF switch Continuity Connector Terminal Connector Terminal E35 5 M28 1 Existed - Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.
ABS actuator and electric unit (control unit) - Continuity Connector Terminal E35 5 Ground Not existed Is the inspection result normal?
YES: GO TO 2.
NO: Repair or replace error-detected parts.
- CHECK VDC OFF SWITCH GROUND CIRCUIT
Check the continuity between VDC OFF switch harness connector and ground.
VDC OFF switch - Continuity Connector Terminal M28 2 Ground Existed Is the inspection result normal?
YES: GO TO 3.
NO: Repair or replace error-detected parts.
- CHECK VDC OFF SWITCH
Check the VDC OFF switch. Refer to "COMPONENT INSPECTION ".
Is the inspection result normal?
YES: GO TO 4.
NO: Replace VDC OFF switch. Refer to "REMOVAL AND INSTALLATION ".
- CHECK VDC OFF SWITCH SIGNAL
With CONSULT
- Connect ABS actuator and electric unit (control unit) harness connector.
- Connect VDC OFF switch harness connector.
- Select "ABS", "DATA MONITOR" and "OFF SW" according to this order. Check the VDC OFF switch signal.
Condition DATA MONITOR When VDC OFF switch is pressed and VDC OFF indicator lamp in combination meter is in ON status On When VDC OFF switch is pressed and VDC OFF indicator lamp in combination meter is in OFF status Off Is the inspection result normal?
YES: INSPECTION END
NO: GO TO 5.
- CHECK TERMINAL
- Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
- Check the VDC OFF switch pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES: Replace ABS actuator and electric unit (control unit). Refer to "REMOVAL AND INSTALLATION ".
NO: Repair or replace error-detected parts.
NO RELATED
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.