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.
Checking The Ignition Switch
- Click on the VCT2000 symbol.
- Check the status for the switch for key-in.
HINT: If the vehicle is equipped with Keyless vehicle module (KVM) always use the remote key in the ignition switch.
Is the function OK?
- Click on the VCT2000 symbol.
- Check that the status of the ignition switch corresponds to all key positions.
Compare with table in DESCRIPTION OF SWITCH FOR START CONTROL UNIT (SCU) .
HINT: If the vehicle is equipped with Keyless vehicle module (KVM) always use the remote key in the ignition switch.
Are all key positions OK?
- YES
Refer to CHECKING THE STARTER MOTOR CIRCUIT
- NO
- Click on the VCT2000 symbol.
- Check that the status of the ignition switch corresponds to all key positions.
Compare with table in DESCRIPTION OF SWITCH FOR START CONTROL UNIT (SCU) .
HINT: If the vehicle is equipped with Keyless vehicle module (KVM) always use the remote key in the ignition switch.
Are all key positions OK?
- YES
Refer to FAULT-TRACING INFORMATION
- NO
Refer to CHECKING THE WIRING
- Click on the VCT2000 symbol.
- Check that the status of the ignition switch corresponds to all key positions.
Compare with table in DESCRIPTION OF SWITCH FOR START CONTROL UNIT (SCU) .
Are all key positions OK?
- YES
Refer to VERIFICATION
- NO
Refer to CHECKING THE IGNITION SWITCH
- Change to another key belonging to the vehicle.
- Click on the VCT2000 symbol.
- Check that the status of the ignition switch corresponds to all key positions.
Compare with table in DESCRIPTION OF SWITCH FOR START CONTROL UNIT (SCU) .
If key positions' status cannot be read out, or if the shown key position is invalid, the Start Control Unit (SCU) is probably defective.
Are all key positions OK?
- YES
Refer to PROGRAMMING NEW KEYS
- NO
- Click on the VCT2000 symbol.
- Check that the status of the ignition switch corresponds to all key positions.
Compare with table in DESCRIPTION OF SWITCH FOR START CONTROL UNIT (SCU) .
Are all key positions OK?
- YES
Refer to VERIFICATION
- NO
Refer to FAULT-TRACING INFORMATION
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.