Cruise Control Disengaged

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The ECM disengages the cruise control operation based on the signals from the following switches:

The On/Off switch
The TCC brake switch
The stop lamp switch
The CPP switch

The TCC brake switch and the stop lamp switch are incorporated into an assembly and are mounted to the brake pedal bracket. Pressing the brake pedal while the cruise control is engaged will disengaged the cruise control system. The ECM monitors the TCC brake switch/cruise control release signal circuit and the stoplamp switch signal circuit. When the brake pedal is pressed, the normally closed TCC brake switch opens and the normally open stoplamp switch closes. The ECM detects a low signal voltage on the TCC brake switch/cruise control release signal circuit and detects a high signal voltage on the stop lamp switch signal circuit. Depressing the clutch pedal while the cruise control is engaged will disengaged the cruise control system. When the clutch pedal is depressed, the normally closed CPP switch opens and the ECM detects a low signal voltage on the CPP switch signal circuit. The cruise control system will disengage when the cruise control On/Off switch is turned Off. The vehicle speed stored in the memory of the ECM will be erased when the cruise control On/Off switch is turned to Off, or the ignition switch is turned off.

The cruise control system will disengage when the ECM detects that the driver has the accelerator pedal override active for approximately 60 seconds.

When the cruise control system is disengaged, the ECM sends a class 2 message to the IPC in order to deactivate the cruise control indicator.