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.
Checking other diagnostic trouble codes (DTCs)
HINT: In the event of communication problems, the fault may exist in other parts of the communications network. The role of the central electronic module is to generally control the communications network and to store diagnostic trouble codes (DTCs) in the event of communication problems between control modules.
HINT: If there are diagnostic trouble codes (DTC) stored in the central electronic module these must be fault traced accordingly.
- Ignition on
- Wait approximately 60 seconds
- Read off diagnostic trouble codes (DTCs).
If there are diagnostic trouble codes (DTCs) for communication problems stored for the brake control module in the central electronic module, these must be fault traced first.
Were diagnostic trouble codes (DTCs) stored in the central electronic module?
- YES
OKAY: Troubleshooting has been completed.
- NO
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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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