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.
Fault Management On The Most Network: Notes
The MOST network is monitored by the infotainment control module (ICM). If it detects a fault in the MOST network, a diagnostic trouble code (DTC) is stored in the infotainment control module (ICM). There are different types of diagnostic trouble codes (DTCs) depending on the type of fault. A general rule is that if the light pulse in the MOST network disappears, the entire network stops working.
Fault types which are processed are:
- no communication from a control module
- faulty communication on the MOST network.
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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.