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 Disengaged
The engine control module (ECM) disengages the cruise control operation based on the signals from the following switches:
- The on/off switch
- The clutch start switch
- The cruise brake switch
- The stop lamp switch
The cruise brake switch, the clutch start switch, and the stop lamp switch are used to disengage the cruise control system. The stop lamp and cruise brake switch are incorporated into an assembly and are mounted to the brake pedal bracket. When the brake pedal is pressed, the normally closed cruise brake switch opens and the normally open stop lamp switch closes. The ECM/powertrain control module (PCM) detects a low signal voltage on the cruise brake signal circuit and detects a high signal voltage on the stop lamp switch signal circuit. When the clutch pedal is pressed, the normally closed clutch start switch opens and the ECM/PCM detects a low signal voltage on the clutch start switch signal circuit. The cruise control system will disengage when the cruise control on/off switch is switched to OFF. The vehicle speed stored in the memory of the ECM/PCM will be erased when the cruise control on/off switch is turned OFF, or the ignition switch is turned OFF.
The cruise control system will disengage when the ECM/PCM detects that a driver override function has been active for approximately 60 seconds.
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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.