Service and Repair Manual
November 2016
Fault Codes
110
GS-2669 DC • GS-3369 DC • GS-4069 DC
Part No. 1272220GT
Type "FXXX" Faults, continued
DTC
Number
Message on
GCON LCD
Description
Possible Causes
Failure Mode
F049
F049:SENSORFAULT
PUMP SPEED:Bat+
Short circuit of the pump speed
sensor to battery positive.
• Short circuit of the pump speed sensor.
• Short circuit in pump speed sensor harness.
• GCON ECM.
All functions operate.
F050
F050:SENSORFAULT
PUMP:Open/Bat-
Short circuit of the pump speed
sensor to battery negative or open
circuit.
• Short or open circuit of the pump speed sensor.
• Short or open circuit in pump speed sensor harness.
• GCON ECM.
All functions operate.
F051
F051:SWITCHFAULT
ACC PRESS:Bat+
Short circuit of the accumulator
pressure switch to battery positive.
• Short circuit of the accumulator pressure switch.
• Short circuit in function manifold harness.
• GCON ECM.
• Faulty hydraulic pump
All functions inhibited
except platform as long as
machine is in the elevated
position.
If machine is in stowed
position, all functionality is
resumed.
F052
F052:SWITCHFAULT
ACC PRESS:Bat-
Short circuit of the accumulator
pressure switch to battery negative.
• Short circuit of the accumulator pressure switch.
• Short circuit in function manifold harness.
• GCON ECM.
All functions inhibited
except platform as long as
machine is in the elevated
position.
If machine is in stowed
position, all functionality is
resumed.
F053
F053:DCON RR ECM
THERM PROTECTION
Right rear drive controller, thermal
protection senses that temperature
has exceeded 185° F / 85° C.
• Excessive heat.
• Faulty thermal sensor in right rear drive controller.
• Right rear DCON ECM.
Drive speed reduces from
185° F / 85° C to 221° F /
105° C.
Drive inhibited at 221° F /
105° C.
F054
F054:DCON LR ECM
THERM PROTECTION
Left rear drive controller, thermal
protection senses that temperature
has exceeded 185° F / 85° C.
• Excessive heat.
• Faulty thermal sensor in left rear drive controller.
• Right rear DCON ECM.
Drive speed reduces from
185° F / 85° C to 221° F /
105° C.
Drive inhibited at 221° F /
105° C.
F057
F057:MOTOR RR
ENCODER FAULT
Return signal from the right rear drive
motor encoder to the right rear drive
controller is 40 Hz or higher.
• Short or open circuit of the drive motor encoder.
• Faulty encoder in right rear drive motor.
• Faulty right rear drive motor.
• Right rear DCON ECM.
All functions inhibited.
F058
F058:MOTOR LR
ENCODER FAULT
Return signal from the left rear drive
motor encoder to the left rear drive
controller is 40 Hz or higher.
• Short or open circuit of the drive motor encoder.
• Faulty encoder in left rear drive motor.
• Faulty left rear drive motor.
• Left rear DCON ECM.
All functions inhibited.
F059
F059:MOTOR RR
STALL/ENCODER
Right rear drive motors rotor is stuck
or the return signal from the encoder
is incorrect.
• Right rear drive motor not turning.
• Short or open of the drive motor encoder.
• Faulty encoder in right rear drive motor.
• Faulty right rear drive motor.
• Right rear DCON ECM.
Drive functions inhibited.
F060
F060:MOTOR LR
STALL/ENCODER
Left rear drive motors rotor is stuck or
the return signal from the encoder is
incorrect.
• Left rear drive motor not turning.
• Short or open of the drive motor encoder.
• Faulty encoder in left rear drive motor.
• Faulty left rear drive motor.
• Left rear DCON ECM.
Drive functions inhibited.
F061
F061:MOTOR RR
THERMAL SENSOR
Open circuit of the right rear drive
motor thermal sensor to right rear
drive controller (D3) or faulty thermal
sensor.
• Open circuit in right rear drive motor harness.
• Faulty thermal sensor in right rear drive motor.
• Right rear DCON ECM.
Drive performance
reduced.
F062
F062:MOTOR LR
THERMAL SENSOR
Open circuit of the left rear drive
motor thermal sensor to left rear
drive controller (D3) or faulty thermal
sensor.
• Open circuit in left rear drive motor harness.
• Faulty thermal sensor in left rear drive motor.
• Left rear DCON ECM.
Drive performance
reduced.
F063
F063:SENSORFAULT
STEER ANG:RANGE
Steer angle sensor out of range.
• Short or open circuit of the steer angle sensor.
• Short or open circuit of the steer angle sensor harness.
• Steer angle sensor needs to be calibrated.
• Faulty steer angle sensor.
• Right rear DCON ECM.
Drive performance
reduced.