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POLARIS COMMERCIAL
CENTRE D'AIDE
8/25/2021

Taylor-Dunn Fault Codes

Some Taylor-Dunn vehicles show fault codes when a component of the vehicle is malfunctioning. Note that fault codes vary by product line. 

Most faults are a result of a fault in the control system that will require service by a qualified Taylor-Dunn Dealer. The faults shown in this article are for reference only.  

Fault Codes: BT-280, RE-380 R0-380, C-425, TT-316 DC, E-455

The display will indicate a fault code whenever the control system logic detects a problem with the control system. A fault code is being displayed whenever the Fault Code Indicator (the letter "F") is visible at the left of the numeric display.

Refer to the fault code table below for description of the fault codes. 

Level 1 Faults
Code Description Recommended Action
F01000 P/S Motor Overheated Stop the vehicle and allow the system to cool
F01001 Motor Brush Fault Refer to service technician
F01002 Pump Motor Brush Fault Refer to service technician
F01003 P/S Motor Brush Fault Refer to service technician
F01004 Low Battery Volts Batteries are empty and require charging. If this fault does not reset after the charge cycle is complete then there may be a problem with the charger or batteries. Refer to qualified service technician. 
F01005 Controller Overheated Stop the vehicle and allow the system to cool down. This could be a result of an overloaded vehicle. 
F01006 Traction Motor Hot Stop the vehicle and allow the system to cool down. This could be a result of an overloaded vehicle. 
F01007 Pump Motor Overheated Stop the vehicle and allow the system to cool down. 
F01008 Wiring Fault Refer to service technician
Level 2 Faults
Code  Description Recommended Action
F02000 Throttle Fault Refer to service technician
F02001 Throttle Fault Refer to service technician
F02002 Belly Switch Fault Refer to service technician
F02003 Open Field Refer to service technician
F02004 Open Field L Refer to service technician
F02005 Open Field R Refer to service technician
Level 4 Faults
Code Description Recommended Action
F04000 Open Contactor Refer to service technician
F04001 Contactor Welded Refer to service technician
F04002 Steer POT Fault N/A
F04003 Sequence Fault Start up switches were not operated in the correct order. Refer to Vehicle Operation Guidelines for correct sequence
F04004 F&R Fault Refer to service technician
F04005 F&R Fault Direction was selected before start switch was closed. Place direction selector in the OFF position and restart.
F04006 Interlock Fault Seat or foot interlock switch not closed.
F04007 Inch Switch Fault Direction Control switch NOT in neutral. 
F04008 Steer Fault Refer to service technician
F04009 Low Battery Volts Extreme low battery voltage at the controller. May be a result of severely discharged battery or wrong battery installed. Confirm that the correct battery is installed and charge the battery.
F04010 High Battery  Volts Refer to service technician
F04011 Out of Range Fault Refer to service technician
F04012 CRC Fault Refer to service technician
F04013 Capacitor Fault Refer to service technician
Level 5 Faults
All Level 5 faults indicate a failure in the motor speed control system. Refer repair to a service technician. 

Fault Codes: Bigfoot XL, TT-316 AC
The display on these vehicles will indicate a fault code whenever the control system logic detects a problem with the control system. A fault code is being displayed whenever the Fault Code Indicator (the letter "F") is visible at the left of the numeric display.

Refer to the fault code table below for a description of possible fault codes. 

Display Flash Message Action
F10101 10 Unit in preoperational Refer to dealer for repair. 
F15101 15 Vehicle Service Required Service the vehicle.
F16010 6 Seat (warning) Operator presence switch is open. Confirm driver seat properly positioned.
F17001 7 BDI Warning Low battery voltage. Charge the batteries. 
F17002 7 BDI Cutout Low battery voltage. Charge the batteries.
F17003 7 Low Battery Cut Refer to dealer for repair.
F17004 7 High Battery Cut Refer to dealer for repair.
F17006 7 Vbat below rated min Low battery voltage. Charge the batteries.
F17007 7 Vbat above rated max Refer to dealer for repair. 
F17009 7 Motor in low voltage cutback Warning only (not a fault) due to transient low voltage.
F18001 8 Device too cold Move to warmer location
F18002 8 Device too hot Overloaded, allow controller to cool.
F18003 8 Motor in thermal cutback Overloaded, allow controller to cool. 
F18004 8 Motor too cold Move to warmer location.
F22001 2 Seat Fault Operator presence switch is open. Confirm driver seat properly positioned.
F22002 2 Two Direction Fault Refer to dealer for repair. 
F22003 2 SRO Fault Throttle pedal pressed without direction selected.
F22004 2 Sequence Fault Throttle or direction selected at power up.
F22006 2 Inch Fault Inching switch active along with any drive switch, seat switch indicating operator present or handbrake switch active. 
F26001 6 Throttle Fault Refer to dealer for repair. 
F35002 5 Motor Open Circuit Fault Refer to dealer for repair. 
F35003 5 No Motor Speed Signal Refer to dealer for repair. 
F37003 7 Power Supply Critical Refer to dealer for repair. 
F41101 11 DSP Encoder Fault Refer to dealer for repair. 
F41102 11 DSP Overcurrent Fault Possible overloaded vehicle.
F41103 11 DSP Control Fault Refer to dealer for repair. 
F41104 11 Motor Overspeed Fault Uncontrolled coasting downhill or towing at excessive speed.
F44001 4 Line Contactor o/c Refer to dealer for repair. 
F44002 4 Line Contactor Welded Refer to dealer for repair. 
F46003 6 Analogue Output Over Current Refer to dealer for repair. 
F46006 6 Analogue Output Over Temperature Refer to dealer for repair. 
F47002 7 Capacitor Precharge Failure Refer to dealer for repair. 
F48001 8 Heatsink Overtemp Overloaded, allow controller to cool.
F53001 3 DSP Overvoltage Refer to dealer for repair. 
F53002 3 DSP Powerframe Fault Possible overloaded vehicle.
F53003 3 MOSFET s/c M1>B+ Refer to dealer for repair. 
F53004 3 MOSFET  s/c M1>B- Refer to dealer for repair. 
F53005 3 MOSFET  s/c M2>B+ Refer to dealer for repair.
F53006 3 MOSFET  s/c M2>B- Refer to dealer for repair.
F53007 3 MOSFET s/c M3>B- Refer to dealer for repair.

Fault Codes: SC-090 AC and R-380 AC
Only shown are the DTCs (faults) caused by the operator or correctable by the operator. There are many other codes; those not listed here cannot be corrected by the operator and must be referred to a qualified technician. 

DTC Code Cause Resolution
12 Overloaded Reduce load on vehicle
16 Control overheated Allow controller to cool
17 Battery low (severe) Charge battery
18 High Battery Voltage Possible due to coasting down grade with full battery charge. Use brakes to control speed down hill.
21 Too Cold Operating with temperatures below -25 C result in power cutback
22 Overheating Reduce load
23 Battery low Charge battery
24 High Battery Voltage Possible due to coasting down grade with full battery charge. Use brakes to control speed down hill.
28 Motor overheating Reduce load
47 Operator sequence error Operate switches in correct order
51 Throttle and Brake pedals pressed at same time Release brake pedal
52
  • Battery door off
  • OPS not engaged
  • Confirm battery doors properly installed
  • Stand in approved operator position
54 Maintenance due soon Have vehicle serviced
55 Maintenance due now Have vehicle serviced
58 Throttle pressed before direction selected Operate switches in correct order
59 Throttle pressed before OPS closed Operate switches in correct order
64 Charger connected Disconnect the charger
73 Motor stalled Reduce load

Fault Codes: 426 AC
If the system detects a fault, an abbreviated fault message will be displayed. Refer to the table below. 

Fault Code Description Note
CRTL FLT Speed controller internal fault or wiring fault 1
CRTL TMP Speed controller overheated 3
EMB FLT Electric brake fault 1
FB OR Foot brake switch is closed 1
HIGH V High battery voltage  
LOCK Electromagnetic motor brake is applied  
LOW V Low battery voltage  
MOTR TMP Motor overheated 3
MOTR FLT Faulty motor or wiring 1
SEAT OFF Seat interlock switch is open 1
SRO FLT Operator error 2
STALL Motor stalled 4

Fault Codes: TC-50E
Any active faults will be displayed at the bottom of the display screen. This fault listing is limited to faults that are generated by operator error or faults that are a result of system operation that can be corrected by the operator. If a fault occurs that is not listed here, then vehicle diagnostics and repair should be referred to a qualified technician. 

Fault ID Fault Display Definition Possible Cause
4481 Handbrake fault Parking brake was applied when throttle pedal was depressed Parking brake applied.
45C1 BDI Warning Battery discharged below warning threshold voltage Battery is getting low on charge
45C2 BDI Cutout Battery empty The battery is empty and requires charging. Vehicle speed is reduced to protect the battery and control system from low voltages.
45C3 Low Battery Cut Battery voltage dropped below protection threshold voltage Possibly an overloaded vehicle. Vehicle speed is reduced to protect the battery and control system from low voltages.
4602 Device is too hot Controller internal temperature exceeded high temperature threshold Motor speed controller has overheated. Reduce the load or stop until temperature is reduced.
4603 Motor in thermal cutback Motor temperature exceeded high temperature threshold Motor has overheated. Reduce the load or stop until temperature is reduced. 
4881 Seat Fault Seat or foot interlock switch open when throttle pedal was pressed. Driver must remain seated while operating vehicle. If equipped with a foot switch, the switch must remain depressed.
4883 SRO Fault Startup switches operated out of order. All operator switches must be actuated in the correct sequence.
4884 Sequence Fault Startup switches operated out of order. All operator switches must be actuated in the correct sequence.
4885 FS-1 Recycle Fault Startup switches operated out of order. All operator switches must be actuated in the correct sequence.
4886 Inch Fault Problem with Inching Buttons Refer to the operation instructions of the inching buttons in the Vehicle Operator and Service Manual. 

Fault Codes: TT-416
Only shown are the DTCs (faults) caused by the operator or correctable by the operator. There are many other codes; codes not listed here cannot be corrected by the operator and must be referred to a qualified technician.

DTC Code Cause Resolution
12 Overloaded Reduce load on vehicle
16 Control Overheated Allow controller to cool
17 Battery Low (Severe) Charge battery
18 High Battery Voltage Possible due to coasting down grade with full battery charge. Use brakes to control speed down hill.
21 Too Cold Operating with temperatures below -13 degrees Fahrenheit (-25 degrees Celsius) results in power cutback
22 Overheating Reduce load
23 Battery Low Charge battery
24 High Battery Voltage Possible due to coasting down grade with full battery charge. Use brakes to control speed down hill.
28 Motor Overheating Reduce load
47 Operator Sequence Error Operate switches in correct order
51 Throttle and Brake pedals pressed at same time Release brake pedal
52 Battery Door Off
or
OPS not engaged
Confirm battery doors properly installed
OR
Stand in approved operator position
54 Maintenance Due Soon Have vehicle serviced
55 Maintenance Due Now Have vehicle serviced
58 Throttle pressed before direction selected Operate switches in correct order
59 Throttle pressed before OPS closed Operate switches in correct order
64 Charger connected Disconnect the charger
73 Motor Stalled Reduce load

For full details on fault codes, refer to your Vehicle Operator and Service Manual
To service a fault code, contact your authorized Taylor-Dunn Dealer. To find a dealer near you, use the Dealer Locator

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