Electric Motor - Toro Greensmaster eFlex 1021 Service Manual

Electric Motor

Testing the Electric Motor
Electrical System: Testing the Electrical Components
The electric motor is a 48 VDC, brushless, permanent magnet motor. The
electric motor has its own on-board controller. If a problem exists with the electric
motor, a fault may have occurred that would be indicated by a fault code on
the InfoCenter Display. Before considering that electric motor service work is
necessary, check for any existing fault codes that indicate problems with the
electric motor; refer to
there will likely be numerous fault codes that are listed by the InfoCenter display.
To operate, the electric motor requires 48V logic power (supplied by the logic
relay) and a connection to the 48V power bus (supplied by the main contactor
when energized).
The electric motor controller is not serviceable. Refer to
for circuit wiring information.
Note: If the electric motor is replaced for any reason, the machine software must
be updated; contact an Authorized Toro Distributor for assistance.
1. Park the machine on a level surface and make sure that the clutch bail in the
NEUTRAL position. Turn the key switch to the OFF position and remove
the key from the key switch.
2. Disconnect the battery pack; refer to
(page 5–3).
3. Locate and disconnect the electric motor cable electrical connections at the
machine wire harness. Check the motor and the harness connector for
damage or corrosion and clean or repair as necessary.
4. Use a multimeter (ohms setting) measure the resistance between the ground
terminal (black wire) and the pin two in four pin connector. Resistance should
be approximately 18.8 K-ohms.
g289715
1. Electric motor connector – 2 pin
2. Ground terminal
5. If electric motor removal, installation, disassembly or assembly is required;
refer to Electric Motor (page
6. If the motor tests correctly and a problem still exits, check the rear wheel
traction motor circuit wiring; refer to
7. After testing is complete, secure the electric motor wire harness connectors.
8. Connect the battery pack; refer to
(page 5–3).
Machine Faults (page
Connecting the Lithium Battery Pack
Figure 56
3. Electric motor connector – 4 pin
4. Pin 2
5–42).
Appendix A (page
Connecting the Lithium Battery Pack
Page 5–30
3–5). If the electric motor is faulty,
Appendix A (page A–1)
A–1).
Greensmaster ® eFlex 1021
20248SL Rev A