Toro Groundsmaster 4500-D Series Service Manual page 53

Fault
Fault Title
ID
C1015 ETR/RTR/OK
to Run - Open
Circuit
C1124 Fan Direction -
Short to Ground
/ Overcurrent
C1125 Fan Direction -
Open Circuit
C1134 Fan Speed -
Short to Ground
/ Overcurrent
C1135 Fan Speed -
Open Circuit
C1413 Solenoid 1 -
Short to Battery
C1414 Solenoid 1 -
Short to Ground
/ Overcurrent
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
Contro- Fault Condition
ller(s) / Circuit
Affected Description
T1
Open circuit
detected on engine
run output.
T1 Overcurrent
detected on fan
direction output
indicating a short
to ground.
T1 Open circuit
detected on fan
direction output.
T1 Overcurrent
detected on fan
speed output
indicating a short
to ground.
T1 Open circuit
detected on fan
speed output.
T2 Low current
detected on
enable S1 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.
T2 Overcurrent
detected on
enable S1 output
indicating a short
to ground.
Additional
Notes
1. Test the output circuit for an open.
2. Test for proper resistance in the component
connected to the primary TEC (P74, pin
10).
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 7).
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 7).
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
44).
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
44).
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 auxiliary TEC (P75, pin
3).
3. Swap the T2: Auxiliary 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 auxiliary TEC (P75, pin
3).
3. Swap the T2: Auxiliary controller with a
known-good unit (contact an Authorized
Toro Distributor for assistance).
Page 3–13
Service Actions
Troubleshooting: