G6 V6-3.9L (2009)
Cruise Control Disengaged
The engine control module (ECM) disengages the cruise control operation based on the signals from the following switches:
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The brake pedal position (BPP) sensor
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The On/Off switch
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The cruise cancel switch
The body control module (BCM) monitors the signal circuit of the cruise control cancel switch. When the cancel switch is activated, the BCM detects a
high signal voltage on the cruise control cancel switch signal circuit. The BCM sends a serial data message to the ECM in order to disengage the cruise
control system.
The BPP sensor is mounted on the brake pedal bracket. Pressing the brake pedal while the cruise control is engaged will disengage the cruise control
system. The body control module (BCM) monitors the BPP sensor via the BPP sensor signal circuit as the voltage signal increases while the pedal
reaches the fully applied position. The BCM sends a serial data message to the ECM indicating the position of the brake pedal. For further information
on the BPP sensor, refer to Exterior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Exterior Lighting
Systems Description and Operation) and Brake Pedal Position Sensor Calibration (See: Lighting and Horns/Brake Light Switch/Service and
Repair/Brake Pedal Position Sensor Calibration).
The cruise control system will disengage when the cruise control on/off switch is switched OFF. The cruise control system will disengage when the ECM
detects that a driver override function has been active for approximately 60 seconds. When the cruise control system has been disengaged, the ECM
sends a serial message to the instrument panel cluster (IPC) in order to turn OFF the Cruise indicator. The vehicle speed stored in the memory of the
ECM will be erased when the cruise control on/off button is turned OFF, or the ignition switch is turned OFF.
Cruise Control Inhibited
The engine control module (ECM) inhibits the cruise control operation when any of the following conditions exist:
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The ECM has not detected a brake pedal activation from the body control module (BCM).
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A cruise control system DTC has been set.
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The vehicle speed is less than 40.2 km/h (25 mph).
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The vehicle speed is too high.
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The vehicle is in PARK, REVERSE, NEUTRAL, or 1st gear.
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The engine RPM is low.
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The engine RPM is high.
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The system voltage is not between 9 volts and 16 volts.
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The antilock brake system (ABS)/traction control system (TCS) is active for more than 2 seconds.
