Electrical System Quick Checks; Battery Test (Open Circuit Test); Charging System Test - Toro ProCore 648 Service Manual

Electrical System Quick Checks

Battery Test (Open Circuit 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 in the OFF position and
all accessories turned off. Connect the positive (+) me-
ter 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 the charging
system is functioning. It will tell you if a charging system
has an output, but not its capacity.
Tool required: Digital multimeter set to DC volts.
Test instructions: Connect the positive (+) meter lead to
the positive battery post and the negative (–) meter lead
to the negative battery post. Leave the test leads con-
nected 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.
ProCore 648
o o o o
to 100 F (16 to 38
Page 5 – 11
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 3400 RPM (high idle). Allow
the battery to charge for at least 3 minutes. Record the
battery voltage.
Test results should be (example):
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
= 12.25 v
= 12.80 v
= +0.55 v
Electrical System