JLG boom lifts (450AJ, 600AJ, 800AJ, 460SJ, 660SJ, 860SJ, 1250AJP, M450AJ, M600JP)
JLG error code 4386 — HIGH INTAKE TEMPERATURE - ENGINE SHUTDOWN
Message on the display: HIGH INTAKE TEMPERATURE - ENGINE SHUTDOWN
Code 4386 occurs in machines: JLG 1250AJP.
blocking fault
The UGM received high intake temperature trouble code from the Engine Control Module. Machine will shutdown the engine and restart prevented. Fault cleared on power cycle but re-evaluated on engine start.
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
- Refer to Engine Manufacture's Take Action for Repair procedure in Diagnostic Trouble Code list using the SPN:FMI provided to diagnose and repair (Engine Trouble Code SPN:FMI = 105:0).
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 4386 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.