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Home >> Buick >> 2009 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Cruise Control System) >> Diagnostic Information and Procedures >> Cruise Control Malfunction >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. 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/PCM monitors the cruise control switch signal circuit in order to detect when a cruise control function switch has been requested. The ECM/PCM detects a predetermined voltage signal when a cruise control function switch is applied, with each switch having a different voltage value.

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