Freestar V6-4.2L VIN 2 (2004)
Test M14-M17
Normal Operation
The driver climate control seat module, passenger climate control seat module, dual automatic temperature control (DATC) module, and the driver
seat module (DSM) communicate with the diagnostic tool through the UART-based protocol (UBP) communications network circuit 2077 (PK/LB). If
the UBP circuit becomes open or shorted to ground, communications to that module will not be possible. Check circuit 2077 (PK/LB) between the
driver climate control seat module, passenger climate control seat module, DATC module, DSM and the DLC C251. Total resistance values must not
be more than 5 ohms. If the resistance is more than 5 ohms, there is either an open in circuit 2077 (PK/LB), damage to the DLC C251 or damage to
one of the networked modules, or a problem in one of the in-line connectors. If, after individual checks of each circuit leading to a module show
resistance values less than 5 ohms, and no in-line connector issues are present, the data link diagnostics test must be run with the module in question
disconnected. If the data links diagnostics test passes with the module in question disconnected, it is the source of the concern and should be removed
