Electronic Control Module (Ecm) - Tracker Off-Road XTR1000 Service Manual

NOTE: The alternator/regulator is not a serviceable

part; therefore, it must be replaced as an assembly.
Installing
1. Place the alternator into position on the engine; then
secure with the existing hardware. Do not tighten at
this time.
2. Place the alternator belt into position; then using a
suitable pry, tension the belt so that with a good belt
it does not spin on the pulley or make noise.
3. Holding tension on the belt, tighten the adjuster cap
screw (A) securely; then remove the pry and tighten
the pivot bolt (B) securely.
XX370
4. Connect the battery wire and connect the voltage
regulator connector; then install the alternator belt
cover; then reinstall the four cap screws with wash-
ers and spacers; then tighten securely; then connect
the negative battery cable to the battery.
REGULATOR/RECTIFIER
(Stator-Powered)
Testing
 NOTE: Prior to performing the following test, make
sure the battery is fully charged.
1. Remove the resistor in the power distribution module
(PDM) beneath the battery access cover.
XX125A
2. Using a suitable multimeter, select the DC Voltage posi-
tion; then connect the red tester lead to the positive bat-
tery post and the black tester lead to the negative
battery post. Note the voltage with the engine not run-
ning
3. Start the engine. The voltage should increase with the
engine running. Typically with the engine at idle it is
around 14.0 DC volts with minimal electrical compo-
nents "on" (accessories, fans, etc). The maximum volts
can be up to 15.5 DC volts.
NOTE: If voltage rises above 15.5 DC volts, the regula-
tor is faulty or a battery connection is loose or corroded.
Clean and tighten battery connections. If voltage does
not rise, check all battery connections, the connections
on the regulator/rectifier, and the stator.
STATOR
Testing
! WARNING
Most voltages generated by the stator system are suffi-
cient to interrupt heart pacemakers! All technicians,
especially those using pacemakers, must avoid contact
with all electrical connections after the engine has been
started.
1. Disconnect the gray connector from the regulator/recti-
fier.
XX332B
2. Using a suitable multimeter, select the AC Voltage posi-
tion; then test between the three yellow wires for a total
of three tests.
3. With the engine running at 2500-3000 RPM, all wire
tests must be within 36-44 AC volts.
NOTE: If tests failed, check all connections, etc., and
test again. If no voltage is present, replace the stator
assembly.
Electronic Control Module
(ECM)
The ECM is located above the battery beneath the battery
access panel.
NOTE: The ECM is not a serviceable component. If

the unit is defective, it must be replaced.
The ECM is rarely the cause for electrical problems;
however, if the ECM is suspected, substitute another
ECM to verify the suspected one is defective.
This system has a built-in feature that will only allow an
ECM of the same part number to be used in this model.
Do not attempt to substitute an ECM from a different
model as the system will not allow it to start.
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