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Home >> Saturn >> 2007 >> Sky Red Line, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC C0277 >> Circuit/System Description
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Circuit/System Description

WARNING: This page is about a different car, the 2007 Pontiac Solstice. However, it is still accessible from the selected car via links, so may be relevant.

The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The brake pedal position sensor provides an analog voltage signal that will increase as the brake pedal is applied. The body control module (BCM) provides a low reference signal and a 5-volt reference voltage to the brake pedal position sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery positive voltage to the stop lamps, center high mounted stop lamp (CHMSL), transmission control module (TCM), and engine control module (ECM). The stop lamps will not operate unless the ignition is in the ON position.

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