Grand Cherokee 2WD Limited V8-4.7L (2002)
Overdrive Switch: Description and Operation
OVERDRIVE SWITCH
DESCRIPTION
The overdrive OFF (control) switch is located in the shifter handle. The switch is a momentary contact device that signals the PCM to toggle current
status of the overdrive function.
OPERATION
At key-on, fourth and fifth gear operation is allowed. Pressing the switch once causes the overdrive OFF mode to be entered and the overdrive OFF
switch lamp to be illuminated. Pressing the switch a second time causes normal overdrive operation to be restored and the overdrive lamp to be turned
off. The overdrive OFF mode defaults to ON after the ignition switch is cycled OFF and ON. The normal position for the control switch is the ON
position. The switch must be in this position to energize the solenoids and allow upshifts to fourth and fifth gears. The control switch indicator light
illuminates only when the overdrive switch is turned to the OFF position, or when illuminated by the transmission control module.
