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Home >> Hummer >> 2009 >> H3 Base, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel Displays And Gages >> Diagnostic Information and Procedures >> Engine Coolant Temperature Gage Inaccurate or Inoperative >> Circuit/System Description

Circuit/System Description

The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the engine control module (ECM). The ECM sends the temperature data via the serial data circuit to the IPC in order to display the engine temperature.

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