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.
Bus Systems: FlexRay
The ICM control unit is connected to the FlexRay controller via the FlexRay bus system. The communication with virtually all partner control units is handled by the microprocessors in the ICM.
The FlexRay is routed to the ICM control unit (from the central gateway module) and continues from there (to the DME/DDE). The ICM control unit is related to the FlexRay, i. e. not an end node. This is why it does not have a terminating resistor for the FlexRay.
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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.