Electrical System Quick Checks; Battery Test (Open Circuit) - Toro Greensmaster 3250-D 04383 Service Manual

Electrical System Quick Checks

Battery Test
Use a multimeter to measure the voltage between the
battery terminals.
Set the multimeter to the DC volts setting. The battery
should be at a temperature of 60
key should be off and all accessories turned off. Connect
the positive (+) meter lead to the positive battery post
and the negative (--) meter lead the the negative battery
post.
Note: This test provides a relative condition of the bat-
tery. Load testing of the battery will provide additional
and more accurate information.
Charging System Test
This is a simple test used to determine if a charging sys-
tem is functioning. It will tell you if a charging system has
an output, but not its capacity.
Use a multimeter set to the DC volts setting. Connect the
positive (+) meter lead to the positive battery post and
the negative (--) meter lead to the negative battery post.
Leave the test leads connected and record the battery
voltage.
NOTE: Upon starting the engine, the battery voltage
will drop and then should increase once the engine is
running.
NOTE: Depending upon the condition of the battery
charge and battery temperature, the charging system
voltage will increase at different rates as the battery
charges.
Electrical System (Rev. C)
o o
to 100 F. The ignition
Page 5 - - 8
Voltage Measured
12.68 V (or higher)
12.45 V
12.24 V
12.06 V
11.89 V
Start the engine and run at high idle. Allow the battery
to charge for at least three (3) minutes. Record the bat-
tery voltage.
An example of a charging system that is functioning:
At least 0.50 volt over initial battery voltage.
Initial Battery Voltage
Battery Voltage after 3 Minute Charge
Difference
Rev. I
Battery Charge Level
Fully charged (100%)
75% charged
50% charged
25% charged
0% charged
= 12.30 v
= 12.85 v
= +0.55 v
Greensmaster 3250--D