Toro Groundsmaster 4500-D Series Service Manual page 63

Fault
Fault Title
ID
P111C Traction Coil 1
REV - Validation
Failure - Current
Converge
P111D
Traction Coil 1
REV - Validation
Failure - PWM
Converge
P111E
Traction Coil 1
REV - Feedback
Measurement
Validation
Failure
P1164 Swashplate 1 -
Signal Shorted
to Gnd
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
Contro- Fault Condition
ller(s) / Circuit
Affected Description
T1 A current monitor
which validates
the intended
traction coil current
is indicating
an unexpected
variance between
the desired level
of current to the
traction coil and
the actual level
of current to the
traction coil.
It is expected that
the actual level
of coil current
will track the
desired level of
current set by
the drive-by-wire
module.
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
is 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 Short to ground
detected on swash
plate sensor signal.
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).
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).
PTO is Check for shorted wire (P74, pin 28).
disabled
traction
speed is
reduced by
50%.
Page 3–23
Service Actions
Check the traction coil wiring and
connector (P74, pin 32).
Test the traction coil wiring.
Check the traction coil wiring and
connector (P74, pin 32).
Test the traction coil wiring.
Check the traction coil wiring and
connector (P74, pin 32).
Test the traction coil wiring.
Troubleshooting: