JLG boom lifts (450AJ, 600AJ, 800AJ, 460SJ, 660SJ, 860SJ, 1250AJP, M450AJ, M600JP)
JLG error code 4330 — FUEL ACTUATOR - CURRENT FEEDBACK READING LOST
Message on the display: FUEL ACTUATOR - CURRENT FEEDBACK READING LOST
Code 4330 occurs in machines: JLG 340AJ, 600SC, 600SJC, 660SJC.
blocking fault
The JLG display shows code 4330 with the message “FUEL ACTUATOR - CURRENT FEEDBACK READING LOST”. It is a blocking fault or a safety-related code: do not use the machine until the cause has been found and removed.
Possible causes
The manual does not list the causes for this code: the service technician establishes them during diagnosis of the machine.
What you can do
Switch the machine off with the emergency stop and switch it on again. If the code comes back, do not use the machine and call service.
Solution from the manual
Part or all of the commanded current is being diverted from the ground return path. Inspect wiring for physical damage and check for wire continuity and a low resistance return path. Cycle power to clear the fault.
Source: JLG Service and Maintenance Manuals: 600AJ (3121201), 800AJ (3120858), 460SJ, 860SJ, 1250AJP (3122581800), M450AJ (3121829), M600JP (3121711), Diagnostic Trouble Codes tables.
The descriptions are quoted from the manufacturer's service documentation and are for guidance only. Clearing codes, calibrations and repairs are carried out by a qualified service technician according to the manual for the specific serial number. A machine with an active blocking code must not be used until the cause has been removed.
Does code 4330 not go away?
RK Rental services JLG lifts at our workshop or on site at the customer's premises (construction site, factory, warehouse). We read the code, remove the cause and select the parts by serial number.