Cruise Control Engaged

The cruise control system will engage and adjust vehicle speed based on the activation of the following cruise control switches:

• ON/OFF
• Resume/accel
• Set/coast

The engine control module (ECM) monitors the signal circuits of the cruise control switches in order to determine when to capture and maintain the selected vehicle speed. The ECM monitors the vehicle speed sensor signal circuit in order to determine the vehicle speed. The ECM uses the throttle actuator control (TAC) motor in order control the vehicle speed. Ignition positive voltage is supplied from the 10-amp IGN E fuse, to the cruise control switch via the ignition 1 voltage circuit. When the normally open cruise control On/Off switch is turned ON, the switch closes and the engine control module detects a high signal voltage on the cruise On/Off switch signal circuit. When the normally open Set/Coast switched is pressed, the switch closes and the engine control module detects a high signal voltage on the Set/Coast signal circuit. To engage the cruise control system, the On/Off switch must be ON and the set button momentarily pressed. The ECM will confirm that the cruise control enable criteria has been met. When the ECM determines that the cruise control enable criteria has been met, the ECM will engage the cruise control system and record the selected vehicle speed. The ECM will then send a class 2 message to the instrument panel cluster (IPC) in order to activate the cruise control indicator. Pressing the accelerator pedal, 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 current set vehicle speed 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 engine control module 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 is momentarily pressed, with a minimum vehicle speed of 37 km/h (23 mph). When the normally open Resume/Accel switch is activated, the switch closes and the engine control module detects a high signal voltage on the cruise control Resume/Accel switch signal circuit. Activating 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 released, the engine control module will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily activating 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 activated, with the maximum acceleration total of 16 km/h (10 mph) over the current set vehicle speed. Momentarily activating the Resume/Accel switch, after the cruise control system has been disengaged by pressing the brake pedal, will recall the previous set vehicle speed that is recorded in the engine control module.