Toro Groundsmaster 4500-D Series Service Manual page 58

Fault
Fault Title
ID
Transport
C14B3
Solenoid - Short
to Battery
C14B4 Transport
Solenoid - Short
to Ground /
Overcurrent
C14B5 Transport
Solenoid - Open
Circuit
C14C4 PTO 1 - Short
to Ground /
Overcurrent
C14C5 PTO 1 - Open
Circuit
C14D4 PTO 2 - Short
to Ground /
Overcurrent
C14D5 PTO 2 - Open
Circuit
Troubleshooting:
Contro- Fault Condition
ller(s) / Circuit
Affected Description
T1 Low current
detected on range
hi SV output
indicating a short to
a high (+) source.
This short could be
to battery voltage
or to another signal
that is in a high
state.
T1 Overcurrent
detected on range
hi SV. Indicates
short to ground.
T1 Open circuit
detected on range
hi SV.
T1 Overcurrent
detected on deck
PTO 1 PRV-1
output indicating
a short to ground.
T1 Open circuit
detected on deck
PTO 1 PRV-1
output.
T1
Overcurrent
detected on deck
PTO 2 PRV-2
output indicating
a short to ground.
T1 Open circuit
detected on deck
PTO 2 PRV-2
output.
Additional
Notes
1. Test the output circuit for a short.
2. Test for proper resistance in the component
connected to the primary TEC (P74, pin 5).
3. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
1. Test the output circuit for a short.
2. Test for proper resistance in the component
connected to the primary TEC (P74, pin 5).
3. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
1. Test the output circuit for an open.
2. Test for proper resistance in the component
connected to the primary TEC (P74, pin 5).
3. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
1. Test the output circuit for a short.
2. Test for proper resistance in the component
connected to the primary TEC (P74, pin
41).
3. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
1. Test the output circuit for an open.
2. Test for proper resistance in the component
connected to the primary TEC (P74, pin
41).
3. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
1. Test the output circuit for a short.
2. Test for proper resistance in the component
connected to the primary TEC (P74, pin
42).
3. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
1. Test the output circuit for an open.
2. Test for proper resistance in the component
connected to the primary TEC (P74, pin
42).
3. Swap the T1: Primary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
Page 3–18
Service Actions
Groundsmaster ® 4500-D/4700-D
19245SL Rev A