Crown Victoria V8-281 4.6L SFI (1998)
Transmission Control Switch: Description and Operation
The transmission control switch is a momentary contact switch. When the switch is pressed, a signal is sent to the Powertrain Control Module (PCM) to
allow automatic shifts from first through fourth gears or first through third gears only. The PCM energizes the Transmission Control Indicator Lamp
(TCIL) when the switch is off. The TCIL indicates overdrive cancel mode activated (lamp ON) and EPC circuit shorted (lamp flashing) or monitored
sensor failure.
OPERATION
The column range selector includes transmission control switch in the shift lever knob.
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The system automatically engages into the OVERDRIVE mode each time the ignition switch is turned to RUN.
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Pressing the transmission control switch with the ignition switch in RUN locks out the OVERDRIVE mode; pressing once again cancels the lock
out.
