Scan Tool Data Definitions (Cruise Control)

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 Scan Tool Data Definitions contains a brief description of all cruise control related parameters available on the scan tool.

Clutch Pedal Switch: The scan tool displays Applied or Released. The PCM monitors the signal circuit of the clutch start switch. An open switch is displayed as Applied
Cruise Control Active: The scan tool displays Yes or No. The PCM determines the current status of cruise control operation. An active cruise control system is displayed as Yes.
Cruise Disengage (1 - 8) History: The scan tool displays the last 8 reasons why the cruise control system was disengaged. Refer to the Scan Tool Data Definitions (Disengaged History) for descriptions.
Cruise Inhibit Signal Command: The scan tool displays On or Off. The PCM determines when the conditions for inhibiting the cruise control system exists. An inhibited cruise control system is displayed as On.
Cruise On/Off Switch: The scan tool displays On or Off. On vehicles equipped with a 4.8L, 5.3L, 6.0L, or 8.1L engine, the TAC module the monitors the signal circuit of the On/Off switch of the cruise control system. On vehicles equipped with a 6.6L engine, the ECM the monitors the signal circuit of the On/Off switch of the cruise control system. A closed switch is displayed as On.
Cruise Release Brake Pedal Switch: The scan tool displays Applied or Released. The PCM monitors the TCC brake switch/Cruise control release signal circuit. An open switch is displayed as Applied.
Cruise Resume/Accel. Switch: The scan tool displays On or Off. On vehicles equipped with a 4.8L, 5.3L, 6.0L, or 8.1L engine, the TAC module the monitors the signal circuit of the resume/accel switch. On vehicles equipped with a 6.6L engine, the ECM the monitors the signal circuit of the resume/accel switch. A closed switch is displayed as On.
Cruise Set/Coast Switch: The scan tool displays On or Off. On vehicles equipped with a 4.8L, 5.3L, 6.0L, or 8.1L engine, the TAC module the monitors the signal circuit of the set/coast switch. On vehicles equipped with a 6.6L engine, the ECM the monitors the signal circuit of the set/coast switch switch. A closed switch is displayed as On. The cruise control On/Off switch must be switched On in order to correctly view the Cruise Set/Coast Switch parameter.
Engine Speed: The scan tool displays 0 to 9,999 RPM. The PCM monitors the CKP signal circuit in order to determine the engine RPM.
Ignition 1 Signal: The scan tool displays 6 Volts to 18 Volts. The PCM monitors the Ignition 1 signal circuit in order to determine the system voltage.
Reduced Engine Power: The scan tool displays Active or Inactive. When the PCM determines that a throttle actuator control system malfunction exists, the scan tool displays Active.
Stoplamp Pedal Switch: The scan tool displays Applied or Released. The PCM monitors the stop lamp switch signal circuit. An open switch is displayed as Applied.
TAC/PCM Communication Signal: The scan tool displays OK or Fault. The PCM uses the UART serial data circuit in order to communicate with the TAC module. If the communication between the PCM and the TAC module is interrupted, the scan tool displays Fault.
TCC/Cruise Brake Pedal Switch: The scan tool displays Applied or Released. The PCM monitors the TCC brake switch/Cruise control release signal circuit. An open switch is displayed as Applied.
Traction Control Signal: The scan tool displays Active or Inactive. When the PCM receives a class 2 signal from the Electronic Brake Control Module requesting a traction control related function, the scan tool displays Active.
Vehicle Speed Sensor: The scan tool displays 0 to 150 km/h (93.2 mph). The PCM monitors the vehicle speed sensor signal circuit in order to calculate the vehicle speed for display.