JLG Scissor Lifts Fault 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.