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Home >> Pontiac >> 2004 >> GTO Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> DTC 21 >> Circuit Description

Circuit Description

The resistance presented to the instrument cluster on terminal X1-28 is dependent upon the button selected on the trip computer switch. DTC 21 will set if the trip computer switch resistance is less than 1000 ohms for 100 milliseconds. The DTC is reset as soon as the switch resistance is greater than 1000 ohms. The DTC is logged as a History DTC.

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