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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 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.
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 Troubleshooting Codes
Fault Message: Faulty Keyswitch
Description: Both platform and ground modes are selected simultaneously.
Check: Key switch function, Check wiring to key switch function.
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.
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.
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.
Fault Message: Function Problem – Brake Release Permanently Selected
Description: The manual brake release switch was closed during power-up.
Check: Check if brake release switch is obstructed or jammed.
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.
Fault Message: Auxiliary Circuit – Open Relay
Description: The auxiliary relay did not close when energized.
Check: Check the auxiliary relay coil and associated wiring.
Fault Message: Battery Voltage Too Low
Description: The power module momentarily measure battery voltage under 14.5V.
Check: Recharge batteries or check for damaged batteries.
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.
Need JLG aerial lift parts? With thousands of parts in stock, quick shipping and great customer service, Intella Liftparts can help. You can also check out our YouTube channel here for how-to videos, product overviews, and other great clips.