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.
Control module inputs, bus
- Engine speed (ECM)
- ENGINE TORQUE (ECM)
- Pedal position (ECM)
- Current gear ratio
- On automatic transmissions, the value from TCM is given
- For manual gearboxes, the value is calculated by the ECM
- STEERING WHEEL ANGLE SENSOR (657)
See also Bus and diagnostics communication, CONTROL MODULE CONNECTIONS .
Use the Manual With the Right Hardware
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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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