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Home >> Pontiac >> 2005 >> Grand Prix GTP >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> DTC B3621 >> Circuit Description

Circuit Description

The head-up display (HUD) detects that the HUD Information Down signal circuit is low for greater than 60 seconds. The HUD monitors the switch signal circuits in order to perform various functions. The HUD switch contains 3 active low momentary switches, and a variable resistor. The HUD detects a switch activation when the signal circuit is active.

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