Scan Tool Data Definitions Cruise Control

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 On/Off Switch: The scan tool displays On or Off. The TAC module 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. The TAC module 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. The TAC module the monitors the signal circuit of the set/coast 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.

Extended Travel Brake Switch: The scan tool displays Applied or Released. The PCM monitors the signal circuit of the extended travel brake switch. An open switch is displayed as Applied

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.

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.

Scan Tool Data Definitions Disengaged History

Brake Switches: The TAC module detects one of the brake switches active (TCC Brake Switch/Cruise Control Brake Switch or Stop Lamp Switch).

Pedal Initialization: The PCM does not detect the brake or clutch switches active during an ignition cycle.

Clutch Switch: The TAC module detects the clutch switch active.

S/C (Set/Coast) On, CC (Cruise Control) Off: The TAC module detects the Cruise Set/Coast signal is ON. When the switch is pushed (Cruise Coast Mode), this parameter will be displayed. If a fault is present with the Cruise Set/Coast signal circuit, this parameter will be displayed.

Coast Speed Low: The Set/Coast switch is pushed and held until vehicle speed drops below 32 km/h (20 mph). Vehicle speed below 32 km/h (20 mph) will disable the cruise system.

TAC Inhibit: The TAC module has detected that an Electronic Throttle Control fault is active.

Accel (Acceleration) Rate: The vehicle acceleration is greater than the expected acceleration rate which is calculated by the PCM.

Decel (Deceleration) Rate: The vehicle deceleration is greater than the expected deceleration rate which is calculated by the PCM.

High Speed: The PCM detects that the vehicle speed is greater than 265 km/h (165 mph).

CC (Cruise Control) Switch Position: The TAC module will not allow cruise with the current position of the cruise switches.

Low Speed: The PCM detects that the vehicle speed is less than 39 km/h (24 mph) when cruise enable is attempted.

No History: The No History parameter is displayed when a battery disconnect occurs.

Cruise Off: The TAC module does not detect that the cruise enable switch is active.

Over Set Speed: The TAC module detects that the vehicle speed is greater than the cruise memory speed by more than a predetermined amount or, the vehicle speed is greater than a predetermined value during a transient maneuver, such as, Resume, Accel, Tap-up or Tap-downs etc.

S/C On-Speed High: This parameter is displayed when the Set/Coast switch is applied (tap down vehicle speed) and the vehicle speed is greater than the cruise memory speed by more than a predetermined value. For example, if the cruise control system is set to maintain a vehicle speed of 48 km/h (30 mph) then the vehicle is accelerated to 80 km/h (50 mph) and you depress the Set/Coast again, the S/C On-Speed High message appears in the Cruise Control Disengage History.

PCM Inhibit: The PCM detects one of the following conditions:

Two CC Commands: The TAC module detects the Set/Coast and Resume/Accel switches are active at the same time.

PCM Error: An internal PCM fault is detected.

Traction Loss: The TAC module detects the vehicle is in a Traction Control event.

Under Set Speed: The TAC module detects that the vehicle speed is less than the cruise memory speed by more than a predetermined amount or, the vehicle speed is less than a predetermined value during a transient maneuver, such as, Resume, Accel, Tap-up or Tap-downs etc.