Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2007 Hummer H2 V8-6.0LFACTORY OEM SERVICE PROCEDURE
Scan Tool Data Definitions (Cruise Control)
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.
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. Scan Tool Data Definitions (Disengage History)
Cruise On/Off Switch
- The scan tool displays On or Off. The TAC module 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 monitors the signal circuit of the Resume/Accel. switch of the cruise control system. A closed switch is displayed as On.
Cruise Set/Coast Switch
- The scan tool displays On or Off. The TAC module monitors the signal circuit of the Set/Coast switch of the cruise control system. A closed switch is displayed as On. The cruise 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.
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.
Stoplamp Pedal Switch
- The scan tool displays Applied or Released. The PCM monitors the stop lamp switch signal circuit. A closed switch is displayed as Applied.
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.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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