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Home >> Buick >> 2009 >> Allure CX >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays & Gauges >> Diagnostic Information and Procedures >> Engine Coolant Temperature Indicator Malfunction >> Circuit/System Description

Circuit/System Description

The instrument panel cluster (IPC) illuminates the engine coolant temperature indicator when the powertrain control module (PCM)/engine control module (ECM) determines that the coolant temperature is more than 128°C (262°F). The IPC receives a serial data message from the PCM/ECM requesting the illumination of the engine coolant temperature indicator.

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