Electrical System Quick Checks; Electrical System Quick Checks; Battery Test (Open Circuit); Charging System Test - Toro Greensmaster 3150 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
C). The ignition key should be off and all accessories
turned off. Connect the positive (+) meter lead to the
positive battery post and the negative (--) meter lead to
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 the charging system
has an output, but not its capacity.
Use a digital multimeter set to DC volts. Connect the
positive (+) multimeter lead to the positive battery post
and the negative (--) multimeter lead to the negative bat-
tery post. Keep the test leads connected to the battery
posts 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 battery voltage will
increase at different rates as the battery charges.
Greensmaster 3150
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to 100 F (16 to 38
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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 (2850 RPM). Allow
the battery to charge for at least three (3) minutes. Re-
cord the battery voltage.
After running the engine for at least three (3) minutes,
battery voltage should be at least 0.50 volt higher than
initial battery 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
Battery Charge Level
Fully charged (100%)
75% charged
50% charged
25% charged
0% charged
= 12.30 v
= 12.95 v
= +0.65 v
Electrical System