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Home >> Jeep >> 1993 >> Grand Cherokee Base, 5.2 Y, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 5.2L >> Computerized Engine Controls >> Input Devices >> Transmission Overdrive Override Switch (A/T Models)

Transmission Overdrive Override Switch (A/T Models)

On models with Overdrive, PCM regulates overdrive upshift and downshift through overdrive solenoid. Transmission overdrive override switch is mounted in instrument panel.

Switch is normally closed. If switch is depressed and switch opens, transmission will not enter Overdrive. Transmission will downshift if it is in Overdrive and switch is depressed.

Switch circuit contains 2 other switches: a transmission thermo-switch and a coolant temperature switch. When either switch opens, transmission will not shift into overdrive, or will downshift if already in overdrive.

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