Caravan FWD V6-201 3.3L VIN R MFI (1997)
Shift Indicator: Description and Operation
CIRCUIT OPERATION
On vehicles equipped with an automatic transmission an electronic PRNDL is used to indicate to the operator gearshift position.
When the ignition switch is in the OFF (unlock), RUN, or START position the Body Control Module (BCM) transmits a message over the CCD
Bus instructing the instrument cluster to illuminate the proper display.
The BCM receives its information over the CCD Bus from the Transmission Control Module (TCM) on gearshift position. When the ignition
switch is moved to the RUN position, the BCM instructs the instrument cluster to illuminate all segments of the PRNDL as a check.
