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.
Normal Operation and Fault Conditions
With the ignition ON, the TBC sends messages to the ABS module over the HS-CAN2 through the GWM. If the ABS module does not receive these messages within the specified time frame, the module sets a DTC. This can be due to a TBC failure, a circuit failure on the GWM or an excessive load on the network. For information on the messages sent to the ABS module by the TBC, refer to the Description and Operation in the Anti-Lock Brake System (ABS) and Stability Control article.
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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.