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.
Workshop Hints: Diagnosis
All inputs/outputs that are part of the Power Module can be diagnosed by Test Modules or status checked by the Control Unit Functions of the Diagnosis Program. The outputs can also be activated by Component Activation and the power consumption displayed.
The Diagnosis Program is based on the E46 concept.
All electronic fuses and the electronic battery master switch are monitored for short circuits/circuit breaks. In the event of a fault, an appropriate entry is made in the PM's fault memory and, if appropriate, a check control message initiated.
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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