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.
Pre-Drive Check, Phase 1
In phase 1 of the pre-drive check, the igniter output stages are tested (with the exception of the high-side transistor, which is controlled via the alarm pulse).
During phase 1, no alarm pulse is generated. The sensors are stimulated and tested. On conclusion of this test the result is communicated in the control unit status telegram. An OK signal is only transmitted if all the tests have run without faults.
If any faults occur during the pre-drive check, these are stored in the fault memory.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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