Troubleshooting
50940411/G0219 186 Printed in U.S.A.
1
(5)
Pump right sensor
neutral drift fault
Front pump swash plate not in
neutral at startup; swash sensor
out of calibration (if applicable).
Failure of one or both of the front
solenoid valves, wiring fault or
mechanical failure in pump. If
accompanied by code 5, front
sensor ground wire open or short.
Both pumps are disabled;
Parking brake will not
disengage.
Check rear sensor calibration,
recalibrate sensor if req’d. Refer to
the Service Manual.
Check wiring and connectors on
font sensor and front solenoid
valves.
Check Controller2 wiring and
connectors.
Check pump for mechanical
damage.
Check sensor supply and signal
voltages. Refer to the Service
Manual.
Check rear solenoid valves for
mechanical damage.
Check resistance of front solenoid
valve coils. Refer to the Service
Manual.
Replace front sensor or front
solenoid valves.
2
(6)
Pump left sensor
neutral drift fault
Rear pump swash plate not in
neutral at startup; swash sensor
out of calibration (if applicable).
Failure of one or both of the rear
solenoid valves, wiring fault or
mechanical failure in pump. If
accompanied by code 6, rear
sensor ground wire open or short.
Both pumps are disabled;
Parking brake will not
disengage.
Check rear sensor calibration,
recalibrate sensor if req’d. Refer to
the Service Manual.
Check wiring and connectors on
rear sensor and rear solenoid
valves.
Check controller2 wiring and
connectors.
Check pump for mechanical
damage.
Check sensor supply and signal
voltages. Refer to the Service
Manual.
Check rear solenoid valves for
mechanical damage.
Check resistance of rear solenoid
valve coils. Refer to the Service
Manual.
Replace rear sensor or rear
solenoid valves.
Table 57: Drive and Valve Error Codes
Error
Code
Error Description Fault Cause Fault Action Corrective Action