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Home >> Jeep >> 1997 >> Cherokee 4WD L6-4.0L VIN S >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Description and Operation >> Functional Operation >> Inputs and Outputs >> Inputs >> Brake Switch
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Brake Switch

BRAKE SWITCH
When the brake light switch is activated, the powertrain control module (PCM) receives an input indicating that the brakes are being applied. After receiving this input, the PCM maintains idle speed to a scheduled rpm through control of the idle air control (IAC) motor. The brake switch input is also used to operate the speed control system.
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