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Home >> Pontiac >> 2008 >> Grand Prix Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 227 (Cruise Control System) >> Diagnostic Information and Procedures >> Cruise Control Inoperative/Malfunctioning >> Circuit/System Description
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Circuit/System Description

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

The cruise control switch is an input to the engine control module (ECM) / powertrain control module (PCM). The ECM (5.3L) / PCM (3.8L) monitors the cruise control set/coast and resume/accelerate switch signal circuit in order to detect when a cruise control function has been requested. The ECM detects a specific voltage signal on the cruise control set/coast and resume/accelerate switch signal circuit when a cruise control function switch is activated, with each switch having a different predetermined voltage value.

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