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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 626 (Cruise Control System) >> Diagnostic Information & Procedures >> DTC P0568: Set/Coast Switch ON For Longer Than 90 Seconds >> Circuit Description

Circuit Description

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The cruise control Set/Coast switch is an input to the Throttle Actuator Control (TAC) module. The cruise control information is supplied to the PCM via serial data. This input allows the PCM and TAC module to control and hold a requested speed. The cruise control Set/Coast switch sends a ignition positive voltage signal to the TAC module when the momentary switch is applied. This DTC sets if the TAC module senses a voltage on the Set/Coast switch signal circuit when the voltage is not expected.

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