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.
Connection And Communication
The Engine Control Module (ECM) is a:
- CAN domain slave.
- Private CAN domain master.
- LIN master.
For vehicles up to model year -2018 the Engine Control Module (ECM) communicates via propulsion CAN.
For vehicles from model year 2018- with a second generation VEA engine there is an extra private CAN between the Engine Control Module (ECM) and the Transmission Control Module (TCM). The control modules are also connected to propulsion CAN but primarily use the private CAN for their intercommunication.
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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