Freestar V6-4.2L VIN 2 (2004)
Information Bus: Description and Operation
Module Controlled Functions
MODULE CONTROLLED FUNCTIONS
The multifunction modules consist of the following:
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smart junction box (SJB)
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driver seat module (DSM)
PRINCIPLES OF OPERATION
Smart Junction Box (SJB)
The SJB is connected to the standard corporate protocol (SCP) communication network. In the absence of the dual automatic temperature control
(DATC) module, the SJB receives input from the function selector switch to operate the manual climate control system. The SJB is a combination of a
multifunction control module and an interior power junction box. SJB functions control multiple systems which include:
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illuminated entry and interior lamps
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exterior lamps
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perimeter alarm
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power door locks
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auto-locks and smart locks
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keyless entry keypad
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remote keyless entry (RKE)
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power windows
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warning chimes
The SJB is equipped on all vehicles and is located behind the LH dash closeout panel.
Driver Seat Module (DSM)
The DSM is on the universal asynchronous receiver-transmitter (UART)-based protocol (UBP) communication network, circuit 2077, (PK/LB). The
DSM controls the positioning and programming of the driver seat and memory exterior rear view mirrors. The DSM is located under the driver seat,
for removal information, refer to Driver Seat Module (DSM).