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10.10
ELECTRICAL
Sportsman 450 Overview
The Power Distribution Module (PDM) integrates these electronic features found on the Sportsman 450; rectifier/regulator, solid-
state circuit breaker output, starter lockout output and engine temperature controller. There are no service parts in the PDM. If
the PDM fails, it must be replaced. Following are overviews of the various PDM circuits and how they function:
Regulator
The rectifier converts the output of the 3-phase alternator (COIL 1,2,3) and applies it to the battery and the PDM loads. The regulator
monitors the battery voltage and shuts off the rectifier when full-charge exists on the battery. SCR's are used to connect and
disconnect the alternator from the battery to achieve regulation of the battery voltage. The regulator shuts off current on the BAT+
pin if the batter exceeds the over-voltage threshold. A high voltage transient will cause the regulator to turn off for a short period
of time. If there truly is an open battery condition then the regulator will remain off, as the minimum battery requirement will not
be met. The regulator will not turn on unless there exists battery voltage in excess of the minimum battery voltage requirement.
Therefore, do not attempt to charge dead batteries using the vehicle's charging system. NOTE: COIL 1 has a resistance to ground.
Battery Protected Output
The battery protected output (BAT_PROT) provides solid-state-circuit-breaker (SSCB) outputs and enables most of the functions
on the PDM. The BAT_PROT output must be routed only to the vehicle key/run switch for proper power up sequence. BAT_PROT
is enabled when the key/run switch connects the BAT_PROT output to loads (must include RUN input). When RUN input goes high,