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. The list is in alphabetical order. A parameter may appear more than once or in more than one data list in order to group certain related parameters together.

APP Indicated Angle: The scan tool displays 0-100 percent. The scan tool displays the Accelerator Pedal Position in percentage. When the APP is not applied, the scan tool displays 0 percent. When the APP is fully depressed, the scan tool displays 100 percent.

Cruise Control Active: The scan tool displays Yes or No. The scan tool displays Yes when the PCM determines that the cruise control has been requested and the criteria for activation has been met.

Cruise Inhibit Signal Command: The scan tool displays On or Off. When the criteria for activating the cruise control has not been met, the PCM will inhibit cruise control operation and the scan tool displays On.

Cruise Disengage 1-8 History: The Scan tool displays the last 8 cruise control disengages in order from 1 to 8. There are 20 possible causes for the cruise control to disengage. Refer to Scan Tool Data Definitions for descriptions.

Cruise On/Off Switch: The scan tool displays On or Off. When the cruise control On/Off switch is switched to On, the scan tool displays ON. When the cruise control On/Off switch is Switched to Off, the scan tool displays OFF.

Cruise Resume/Accel. Switch: The scan tool displays On or Off. When the cruise control On/Off switch is in the On position and the Resume/Accel button is pressed, the scan tool displays ON. When the Resume/Accel switch is released the scan tool displays OFF.

Cruise Set/Coast Switch: The scan tool displays On or Off. When the cruise control On/Off switch is in the On position and the Set/Coast button is pressed, the scan tool displays ON. When the Set/Coast switch is released the scan tool displays OFF.

DTC Set This Ignition: The scan tool displays Yes or No. The PCM monitors the systems function in order to determine if a DTC has been set.

Reduced Engine Power: The scan tool displays Active or Inactive. The scan tool displays Active when the PCM receives a signal from the TAC module that a throttle actuator control system fault is occurring. The PCM limits the engine power.

Stoplamp Pedal Switch: The scan tool displays Open or closed. When the brake pedal is depressed, the scan tool displays Closed and the stoplamp switch is Closed.

TAC/PCM Communication Signal: The scan tool displays OK or Fault. If the communication between the TAC Module and the PCM is interrupted the scan tool displays Fault. The scan tool displays OK under the normal operating conditions.

TCC/Cruise Brake Switch: The scan tool displays Open or Closed. This parameter indicates the state of the TCC/CC brake switch circuit input. The scan tool displays Open when the brake pedal is depressed and the TCC/CC brake switch is open.

Vehicle Speed Sensor: The scan tool displays km/h or mph. The PCM monitors the vehicle speed sensor (VSS) signal circuit. The PCM converts the VSS signal into km/h or mph.

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.

S/C (Set/Coast) On, CC (Cruise Control) Off : The TAC module detects the Cruise Set/Coast signal is ON. When the Set/Coast switch is pushed, 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 control operation 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 ON/OFF 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 on 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.