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 Engaged
The cruise control system will engage and adjust vehicle speeds based on the activation of the following cruise control switches:
- On/Off
- Resume/Accel
- Set/Coast
The cruise control switches are located on the steering wheel.
The ECM monitors the signal circuits of the cruise control switches. The ECM uses the status of the cruise control switches in order to determine when to capture and maintain the selected vehicle speed. The ECM monitors the signal circuit of the vehicle speed sensor in order to determine the desired vehicle speed. The ECM uses the TAC motor in order to maintain the vehicle speed.
Ignition positive voltage is supplied to the cruise control switches from the 2-ampere CRUISE fuse, located in the IPC fuse block. When the normally open cruise control on/off switch is switched On, the switch closes and the ECM detects a high signal voltage on the cruise on switch signal circuit. The cruise control indicator, located on the cruise control on/off switch, will illuminate when the cruise control on/off switched is switched On. To engage the cruise control system, turn the cruise control system ON by pressing the cruise control on/off switch On and momentarily press the set/coast switch. When the set/coast switch is pressed, the normally open set/coast switch closes and the ECM detects a high signal voltage on the set/coast switch signal circuit. The ECM will confirm that the cruise control enable criteria has been met and then engage the cruise control system. The ECM will record the selected vehicle speed. Pressing the accelerator, while the cruise control system is engaged, will allow the driver to override the cruise control system in order to accelerate the vehicle beyond the current set vehicle speed. When the accelerator pedal is released, the vehicle will decelerate and resume the current set vehicle speed. The driver can also override the cruise control system via the set/coast switch and the resume/accel Switch. When the cruise control system is engaged, pressing and holding the set/coast switch will allow the vehicle to decelerate from the current set vehicle speed without deactivating the cruise control system. When the set/coast switch is released, the ECM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily pressing the set/coast switch will allow the vehicle to decelerate at 1.6 km/h (1 mph) increments for each time that the set/coast switch is momentarily pressed, with a minimum vehicle speed of 37 km/h (23 mph). Pressing and holding the resume/accel switch, when the cruise control system is engaged, will allow the vehicle to accelerate to a greater vehicle speed than the current set vehicle speed. When the resume/accel switch is pressed, the normally open resume/accel switch closes and the ECM detects a high signal voltage on the resume/accel switch signal circuit. When the resume/accel switch is released, the ECM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily pressing the resume/accel switch will allow the vehicle to accelerate at 1.6 km/h (1 mph) increments for each time that the resume/accel switch is momentarily pressed, with a maximum acceleration total of 16 km/h (10 mph) over the current set vehicle speed. Momentarily pressing the resume/accel switch, when the cruise control system has been disengaged by pressing the brake pedal, will recall the previous selected vehicle speed that is recorded in the ECM.
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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.