54Service Manual – SC5000 04 - Control System
2-027 M7 Actuator Motor Open
Description The power module has detected an open circuit in the deck actuator circuit.
Setting
Conditions
The power module examines the circuit for voltage drop, which
should be near 0 volts when the motor is not commanded to
operate.
When Monitored
Bootup
Possible Causes
• Loose connection
• Failed limit switch diode (internal fault)
Initial Action Check Fuse F10
Troubleshooting Steps
1. Use the Service menu, Output test to conrm that the actuator is non-functional in either direction.
− If the actuator is functional, and the error is still reported, replace the power module.
2. Disconnect the J6 connector from the power module.
3. Disconnect the deck actuator from the main harness. (X83, 2-pin connector).
4. Check the harness for open circuit.
a. Check the resistance between J6-6 at the power module to contact 1 at the actuator connector.
b. Check the resistance between J6-1 at the power module to contact 2 at the actuator connector.
– If either reading is open-circuit, repair or replace the harness.
– If both readings are at or near 0 ohms, replace the deck actuator.
2-028 M8 Option Pump Motor Open
Description Wash pump motor is open circuit.
Setting
Conditions
The power module has detected no current on the M8 output.
When Monitored
Always
Possible Causes
• Disconnected motor.
• Worn carbon brushes
Initial Action Check Fuse F7
Troubleshooting Steps
1. Disconnect the J6 connector from the power module.
2. Disconnect the option pump from the main harness.
3. Check the harness for open circuit.
a. Check the resistance between J6-10 at the power module to contact 1 at the pump connector.
b. Check the resistance between J6-11 at the power module to contact 2 at the pump connector.
– If either reading is open-circuit, repair or replace the harness.
– If both readings are at or near 0 ohms, replace the pump motor.
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