Impala V6-3.9L (2007)
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The ECM detects the analog cruise control switch input is out of the normal voltage range.
TAC Inhibit
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The ECM detects a fault within the throttle actuator control (TAC) system.
TCS
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The ECM detects that the traction control system had been activated. It is also possible that a tire with low air pressure can also set this
disengagement reason.
Trans. DTC
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The ECM detects a transmission gear fault.
Under Set Speed
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The ECM detects that the vehicle speed is less than the cruise memory speed by more than a calibrated amount.
VSES
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The ECM detects that the vehicle stability enhancement system had been activated.
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.
APP Indicated Angle
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This parameter displays the angle of the accelerator pedal as calculated by the control module using the signals from the accelerator pedal position
sensors. The accelerator pedal position (APP) indicated angle is a range of values indicating a low percentage when the accelerator pedal is not
depressed to a high percentage when the accelerator pedal is fully depressed.
BPP Circuit Signal
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The scan tool displays Applied or Released. This is the state of the brake pedal position (BPP) sensor as received by the engine control module
(ECM) from the body control module (BCM) via a GMLAN serial data message.
BPP Signal
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The scan tool displays Applied, Released or Invalid. This is the state of the BPP sensor as received by the ECM from the BCM via a GMLAN
serial data message.
Cruise Cancel Switch
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The scan tool displays Active, Inactive or Invalid. This is the state of the cruise cancel switch as received by the ECM from the BCM via a
GMLAN serial data message.
Cruise Control Active
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The scan tool displays Active, Inactive or Invalid. This is the state of the cruise control system as detected by the ECM.
Cruise Control Switch
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The scan tool displays On, Off, Resume, Set, Error or Cancel. This is the status of the cruise control switch as detected by the BCM.
Cruise Disengage (1-8) History
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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
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The scan tool displays On or Off. The ECM receives a GMLAN serial data message from the BCM indicating the status of the cruise on/off
switch. The BCM monitors the cruise control set/coast and resume/accelerate switch signal circuit. A closed switch is displayed as On.
Cruise Resume/Accel. Switch
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The scan tool displays On or Off. The ECM receives a GMLAN serial data message from the BCM indicating the status of the cruise resume/accel
switch. The BCM monitors the cruise control set/coast and resume/accelerate switch signal circuit. A closed switch is displayed as On. The cruise
control On/Off switch must be switched On in order to correctly view the Cruise Resume/Accel. Switch parameter.
Cruise Set/Coast Switch
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The scan tool displays On or Off. The ECM receives a GMLAN serial data message from the BCM indicating the status of the cruise set/coast
switch. The BCM monitors the cruise control set/coast and resume/accelerate switch signal circuit. 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.
