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Home >> Ford >> 2012 >> Econoline Base, Van Cargo >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 73 (Cruise Control System) >> Diagnosis And Testing >> Cruise Control >> Pinpoint Tests >> Pinpoint Test A: The Cruise Control Is Inoperative >> Normal Operation

Normal Operation

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A reference voltage is sent from the PCM to the steering wheel cruise control switches. When a switch is pressed, the voltage is routed through a specific resistor value for each function. The PCM provides the ground for the reference voltage to determine which control input function has been selected. When the brake pedal is applied, the PCM deactivates the cruise control, if engaged.

The cruise control deactivator switch interrupts the voltage signal to the PCM when the brake pedal is firmly applied. This is a redundant signal to the PCM.

This pinpoint test is intended to diagnose the following: 

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