Electrical System Quick Checks; Testing The Battery (Open Circuit Test); Testing The Charging System - Toro Groundsmaster 3280-D Service Manual

Electrical System Quick Checks

Testing the Battery (Open Circuit Test)

Testing the Charging System

Groundsmaster ® 3280-D/3320
05138SL Rev B
Use a multimeter to measure the voltage between the battery terminals; refer to
Battery Test Table (page
Set the multimeter to the DC volts settings. The battery must be at a temperature
of 16°C to 38°C (60°F to 100°F). Ensure that the key is in the O
all the accessories are turned off.
Connect the positive (+) multimeter lead to the positive battery post and negative
(-) multimeter lead to the negative battery post.
Measure and record the battery voltage. Use the
to determine charge level of the battery.
Note: This test provides a relative condition of the battery. The load testing of
the battery provides additional and more accurate information; refer to
the Battery (page 6–81).
Battery Test Table
Voltage Measured
12.68 V (or higher)
12.45 V
12.24 V
12.06 V
11.89 V
This is a simple test that determines if a charging system is functioning. It tells
you if the charging system has an output, but not its capacity.
Tool required: Digital multimeter to set DC volts.
Test instructions: Connect the positive (+) multimeter lead to the positive battery
post and negative (-) multimeter lead to the negative battery post. Keep the test
leads connected to the battery posts and record the battery voltage.
Note: When starting the engine, the battery voltage drops and then must
increase once the engine is running.
Note: Depending upon the condition of the battery charge and battery
temperature, the battery voltage increases at different rates as the battery
charges.
Start the engine and run it at high-idle speed. Allow the battery to charge for a
minimum time of 3 minutes. Record the battery voltage.
Note: After running the engine for a minimum time of 3 minutes, the battery
voltage must be minimum 0.50 V higher than that of the initial battery voltage.
Refer to the Battery Voltage Table (page 6–16)
system that is functioning.
6–15).
Page 6–15 Electrical System: Electrical System Quick Checks
position and
FF
Battery Test Table (page 6–15)
Battery Charge Level
Fully charged (100%)
75% charged
50% charged
25% charged
0% charged
for an example of a charging
Servicing