August 2021 Service and Repair Manual
Type "PXXX" Faults
Part No. 1309020GT GS
™
-30m • 32m • 30 • 32 • 46 • 55 191
Type "PXXX" Faults, (continued)
DTC
Number
Message on
GCON LCD
Description Possible Causes Failure Mode
P023:
P023:PUMP MOTOR
VOLTAGE NOT OK
Pump motor voltage out of range.
• Pump voltage to low.
• Pump voltage to high.
• DCON ECM.
All functions inhibited.
P025:
P025:PUMP MOTOR
CURRENT FEEDBK+
Open or short circuit of the P-
circuit from the right rear drive
controller to the pump motor.
• Open or short circuit in pump motor P-cable.
• Faulty pump.
• DCON ECM.
All functions inhibited.
P026:
P026:MOTOR RIGHT REAR
VOLTAGE NOT OK
Open or short circuit of the U or W
circuit from the right rear drive
controller to the right rear drive
motor.
• Open circuit. in right rear drive motor U or W cable.
• Drive motor.
• DCON ECM.
All functions inhibited.
P028:
P028:CONTACTOR
STUCK CLOSED
Main contactor stuck in the closed
position.
• Short circuit in main contactor harness.
• Faulty contactor.
• DCON ECM.
All functions inhibited.
P029:
P029:CONTACTOR
DOES NOT CLOSE
Main contactor stuck in the open
position.
• Open circuit in main contactor harness.
• Faulty contactor.
• DCON ECM.
All functions inhibited.
P030: P030:COIL FAULT
Short circuit of the main contactor
coil to battery negative or open
circuit.
• Open or short circuit in main contactor harness.
• Faulty contactor.
• DCON ECM.
All functions inhibited.
P037:
PO37:BATTERY
OUT OF RANGE
Battery voltage is out of range at
startup.
• Open or short circuit in voltage sensor circuits.
• Low batteries.
• Faulty battery.
• Battery charger connected to AC power source.
• DCON ECM.
All functions inhibited.
P039:
P039:DEVICE FAULT
BRAKE PWR RELAY
Open or short circuit of the brake
relay contact or coil.
• Open or short circuit in brake relay harness.
• Brake relay contact stuck closed.
• Faulty brake relay.
• GCON ECM.
All functions inhibited.
P040:
P040:COIL FAULT
BRAKE PWR OPEN
Open or short circuit of the brake
relay contact or coil to battery
negative.
• Open or short circuit in brake relay harness.
• Faulty brake relay.
• Left or right DCON ECM.
• GCON ECM.
All functions inhibited.
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