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.
Start Button
start button (IAU) has two switches, switch 1 and switch 2. Switch 1 is directly connected to Central electronic module (CEM), Keyless vehicle module (KVM), and Engine control module (ECM). Switch 2 is only directly connected to Central electronic module (CEM).
Both switches should close when start button (IAU) is pushed. It is enough for one switch in start button (IAU) to be closed for the vehicle to start. If the signals from the switches show different status on start button (IAU) a fault code is set in Central electronic module (CEM), and the function for autostart is lost.
If only one of the switches for the start button is OK, the vehicle can only be turned off if it is stationary.
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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.