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.
ECM Input Code EI80 - Cruise Control Set/Coast Input: Notes
Cruise control "SET/COAST" switch is normally open, providing a 12-volt signal to ECM pin "B4" when switch is depressed. When cruise control dash switch is depressed to "ON" position, the dash switch provides a 12-volt signal to the cruise control/steering column switch on pin "A4" of circuit No. 397. When "SET/COAST" button is depressed, the steering column switch pin "A4" is connected to pin "E3" of circuit No. 84, providing the ECM with a 12 volt input on pin "B4".
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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.