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.
Cruise Control System
The Powertrain Control Module (PCM) controls ground circuit to vacuum and vent solenoids in speed control servo for controlling the cruise control system. When PCM completes the ground circuit to vacuum and vent solenoids in speed control servo, throttle is opened, and when ground circuits are open, throttle is closed. PCM balances the vacuum and vent solenoid operation to maintain the set vehicle speed. If a failure exists in the cruise control system, a Diagnostic Trouble Code (DTC) will be stored in the PCM.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.