JLG boom lifts (450AJ, 600AJ, 800AJ, 460SJ, 660SJ, 860SJ, 1250AJP, M450AJ, M600JP)
JLG error code 3390 — PLATFORM LEVEL DOWN VALVE - SHORT TO BATTERY
Message on the display: PLATFORM LEVEL DOWN VALVE - SHORT TO BATTERY · flash code 3/3
Code 3390 occurs in machines: JLG 860SJ, 800S, 600AJ, 600S, 660SJ, 800AJ, 800A, 460SJ, 400S, M600JP, E600JP, 340AJ, 600SC, 600SJC, 660SJC.
blocking fault
There is a Short to Battery to the Platform Level Down Valve
Description from the JLG service manual, in the original wording.
Possible causes
The manual does not list the causes for this code: the service technician establishes them during diagnosis of the machine.
Checks from the manual
- Check Harness for damage.
What service does
A qualified service technician reads the code with the manufacturer's diagnostic tools, finds the cause, clears the code and carries out a function test.
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 3390 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.
Neighbouring JLG codes
- 3387PLATFORM LEVEL UP OVERRIDE VALVE - SHORT TO BATTERY
- 3388PLATFORM LEVEL DOWN VALVE - SHORT TO GROUND
- 3389PLATFORM LEVEL DOWN VALVE - OPEN CIRCUIT
- 3391PLATFORM LEVEL DOWN OVERRIDE VALVE - SHORT TO GROUND
- 3392PLATFORM LEVEL DOWN OVERRIDE VALVE - OPEN CIRCUIT
- 3393PLATFORM LEVEL DOWN OVERRIDE VALVE - SHORT TO BATTERY