Section 05 ELECTRICAL SYSTEM
Subsection 04 (CHARGING SYSTEM)
INSPECTION
CHARGING SYSTEM OUTPUT
First ensure that battery is in good condition prior
to performing the following tests.
NOTE: It is goo
d practice to check for fault
codes using th
e B.U.D.S. software as a first
troubleshoot
ing step. Refer to
MONITORING
SYSTEM/FAULT
CODES
section.
Output Voltage Test Using B.U.D.S.
Connect to th
e latest applicable B.U.D.S. soft-
ware. Refer t
o
COMMUNICATION TOOLS AND
B.U.D.S. SOF
TWARE
section.
In B.U.D.S., select the Monitoring tab then the
ECM tab.
Start engine.
NOTE: Connec
t a garden hose to cool exhaust
system. Refe
rto
EXHAUST SYSTEM
subsection.
Bring engine RPM as specified in the following ta-
ble and read voltage in B.U.D.S.
OUTPUT VOLTAGE TEST USING B.U.D.S.
TEST ENGINE SPEED VOLTAGE (DC)
5500 RPM 14.5 ± .5 Vdc
smr2009-
033-001_a
1. Monitoring tab
2. ECM tab
3. Battery
voltage
If voltage is above specification, replace voltage
regulator/rectifier.
If volta
ge is below specification, check stator
output a
nd wiring harness prior to concluding that
voltage
regulator/rectifier is defective. Refer to
PTO HOUS
ING AND MAGNETO
subsection.
Output Voltage Test Using a
Multim
eter
Set multimeter to Vdc.
Connect multimeter to battery posts.
smr2009-033-002_a
CHARGING SYSTEM VOLTAGE TEST AT BATTERY POSTS
Start engine.
NOTE: Connect a garden hose to cool exhaust
system. Refer to
EXHAUST SYSTEM
subsection.
Bring engine RPM as specified in the following ta-
ble and read voltage with the multimeter.
OUTPUT VOLT
AGE TEST USING A MULTIMETER
TEST ENGINE SPEED VOLTAGE (DC)
5500 RPM 14.5 ± .5 Vdc
If voltage is above specification, replace voltage
regulator/rectifier.
If voltage is below specification, check stator
output and wiring harness prior to concluding that
voltage regulator/rectifier is defective. Refer to
PTO HOUSING AND MAGNETO
subsection.
Output Current Test with an Inductive
Ammeter
Use an inductive ammeter such as the EXTECH IN-
DUCTIVE AMMETER (P/N 380941)
or equivalent.
Turn on the ammeter and select 40 Adc.
NOTE: Zero set the ammeter before use or read-
ing may be erroneous.
Detach fuse box #2 from its support. Move fuse
box aside to gain access to charging system wire.
298 smr2009-033
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