Electrical System Quick Checks; Electrical System Quick Checks; Battery Test (Open Circuit); Charging System Test - Toro Groundsmaster 4000-D Service Manual

Electrical System Quick Checks

Battery Test (Open Circuit)

Use a multimeter to measure the voltage between the
battery terminals.
Set multimeter to the DC volts setting. The battery
should be at a temperature of 60
o
38 C). The ignition key should be off and all accessories
turned off. Connect the positive (+) multimeter lead to
the positive battery post and the negative (--) multimeter
lead to the negative battery post. The multimeter will dis-
play battery voltage.
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.
NOTE: The InfoCenter display can be used to identify
battery voltage during machine operation.
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.

Check Operation of Interlock Switches

CAUTION
Do not disconnect safety switches. They are for
the operator's protection. Check the operation of
the interlock switches daily for proper operation.
Replace any malfunctioning switches before op-
erating the machine.
Groundsmaster 4000--D/4010--D
Voltage Measured
12.68 V (or higher)
12.45 V
o o o
to 100 F (16 to
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.
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
Interlock switch operation is described in the Traction
Unit Operator's Manual. Your Groundsmaster is
equipped with two (2) Toro Electronic Controllers (TEC)
which monitor interlock switch operation. Testing of indi-
vidual interlock switches and relays is included in the
Component Testing section of this Chapter.
NOTE: Use the InfoCenter Display when troubleshoot-
ing an electrical problem on your Groundsmaster.
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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