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JLG Scissor Lift Troubleshooting

Note: Click here to find JLG Wheels

Fix those codes!

We understand every JLG aerial lift encounters a problem once in a while. That’s why we’ve come up with a troubleshooting page for you, this one specifically for JLG scissor lift troubleshooting. Listed below are some popular JLG scissor lifts and their corresponding error codes, although not restricted to these models. If you ever need JLG replacement parts or accessories, you can visit our website by clicking here.

jlg scissor lift troubleshooting

Popular JLG Scissor Lifts:

  • JLG 1930ES
  • JLG 2030ES
  • JLG 2032ES
  • JLG 2630ES
  • JLG 2632ES
  • JLG 2646ES
  • JLG 3246ES

JLG troubleshooting diagnostic codes:

If the number starts with….. it’s a

2-1 – Power Up Problem

2-2 – Platform Controls

2-3 – Ground Controls

2-5 – Function Prevented

3-1 – Line Contactor Open Circuit              6-6 – Communication

3-2 – Line Contactor Short Circuit               6-7 – Accessory

3-3 – Ground Output Driver                        7-7 – Electric Motor

4-2 – Thermal Output                                 8-1 – Tilt Sensor

4-4 – Battery Supply                                   8-2 – Platform Load Sense


Popular JLG Scissor Lift Troubleshooting Codes

  • Error Code: 212

Fault Message: Faulty Keyswitch

Description: Both platform and ground modes are selected simultaneously.

Check: Key switch function, Check wiring to key switch function.

  • Error Code: 221

Fault Message: Horn Permanently Selected

Description: The horn switch was closed during power-up in platform mode.

Check: Check if the horn is damaged, obstructed or jammed.

  • Error Code: 226

Fault Message: Accelerator Faulty

Description: The joystick signal is outside the acceptable range of 0.5V – 4.5V.

Check: Center joystick and check to see if a power cycle will clear DTC.

  • Error Code: 231

Fault Message: Function Problem – Lift Permanently Selected

Description: The ground control box lift switch was closed up or down, during power up in ground mode.

Check: Check if the lift switch is obstructed or jammed.

  • Error Code: 233

Fault Message: Function Problem – Brake Release Permanently Selected

Description: The manual brake release switch was closed during power-up.

Check: Check if the brake release switch is obstructed or jammed.

  • Error Code: 251

Fault Message: Elev Angle Sensor Faulty

Description: Elevation angle sensor input voltage is outside the acceptable range of 0.10V – 4.50V.

Check: Check that the platform elevation sensor is securely mounted and undamaged, Check the elevation sensor wiring.

  • Error Code: 314

Fault Message: Auxiliary Circuit – Open Relay

Description: The auxiliary relay did not close when energized.

Check: Check the auxiliary relay coil and associated wiring.

  • Error Code: 441

Fault Message: Battery Voltage Too Low

Description: The power module momentarily measures battery voltage under 14.5V.

Check: Recharge batteries or check for damaged batteries.

  • Error Code: 775

Fault Message: Open Circuit Field Wiring

Description: Drive, steer, and lift prevented.

Check: The system module applied field current, but could regulate the desired current. The situation is caused by improper field wiring or a damaged motor.

JLG troubleshooting

Need JLG aerial lift parts?  With thousands of parts in stock, quick shipping and great customer service, Intella Parts can help. You can also check out our YouTube channel here for how-to videos, product overviews, and other great clips.

Post by Intella Parts Company, LLC

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A Mechanic’s Best Friend. The Forklift Jack.

Do you work on forklifts? If yes then you need the Alligator Forklift Jack from Intella! For maintenance and repairs, the alligator jack is your right hand man. From wooden shoes to the Alligator Jack, the Netherlands know how to craft some pretty high quality products and this is one of them. Our jack is uniquely designed to handle the toughest of jobs.

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We know what lift truck mechanics need and the Alligator jack has all the features you want:

– custom designed for use on forklift trucks
– max load of 4000kg (8800 pounds)
– minimum height of 60-68mm (2.3-2.7 inches)
– lift height of 420mm (16 inches)
– width of 200mm (7.87 inches)
– weight of 31kg (68 pounds)

We have a complete stock of spare parts, making it completely rebuildable.

The Alligator forklift jack comes with a full 1 year warranty.

Here are a couple pictures of the Alligator Jack in action:
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Watch Our Video

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Post by Intella Parts Company, LLC