Toro Groundsmaster 4500-D Series Service Manual page 62

Fault
Fault Title
ID
P110D
Traction Coil 1
FWD - Validation
Failure - PWM
Converge
P110E
Traction Coil 1
FWD - Feedback
Measurement
Validation
Failure
P1114 Traction Coil
1 REV -
Overcurrent
Troubleshooting:
Contro- Fault Condition
ller(s) / Circuit
Affected Description
T1 PWM convergence
is checking 2 fault
conditions. The
first check is to
confirm that the
PWM duty cycle
across the coil is
decreasing when
the desired current
to the coil is 0.
This ensures the
voltage across the
coil is approaching
0 when required.
The second check
to verify that the
PWM duty cycle
across the coil is
not greater than
the max allowed
limit.
T1 The expected
circuit feedback
(calculated) does
not match the
measured circuit
feedback.
T1 Overcurrent
detected on
traction coil 1 REV
(Neutral REV).
Indicates short to
ground.
Additional
Notes
Traction is
1. Use the InfoCenter to verify the traction
disabled and coil operation.
machine will
2. If no amperage reading is displayed:
come to a
sudden stop.
A.
B.
3. Test the traction coil.
4. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
Traction is
1. Use the InfoCenter to verify the traction
disabled and coil operation.
machine will
2. If no amperage reading is displayed:
come to a
sudden stop.
A.
B.
3. Test the traction coil.
4. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
1. Use the InfoCenter to verify the traction
coil operation.
2. If no amperage reading is displayed:
A.
B.
3. Test the traction coil.
4. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
Page 3–22
Service Actions
Check the traction coil wiring and
connector (P74, pin 17).
Test the traction coil wiring.
Check the traction coil wiring and
connector (P74, pin 17).
Test the traction coil wiring.
Check the traction coil wiring and
connector (P74, pin 32).
Test the traction coil wiring.
Groundsmaster ® 4500-D/4700-D
19245SL Rev A