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.
Circuit Description
The cruise control Set/Coast switch is an input to the throttle actuator control (TAC) module. The cruise control information is supplied to the PCM via serial data. This input allows the PCM and TAC module to control and hold a requested speed. The cruise control Set/Coast switch sends a ignition positive voltage signal to the TAC module when the momentary switch is applied. This DTC sets if the TAC module senses a voltage on the Set/Coast switch signal circuit when the voltage is not expected.
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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.