JLG boom lifts (450AJ, 600AJ, 800AJ, 460SJ, 660SJ, 860SJ, 1250AJP, M450AJ, M600JP)
JLG error code 686 — ENGINE START PREVENTED - CONNECTIVITY INTERLOCK
Message on the display: ENGINE START PREVENTED - CONNECTIVITY INTERLOCK
Code 686 occurs in machines: JLG 1250AJP.
blocking fault
UGM has received a functional interlock or a removal interlock has been set to prevent engine start. Engine start is prevented. Fault is cleared when functional internlock has been cleared.
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.
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.
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 686 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
- 683FUNCTIONS IN CREEP AND RESTRICTED TO TRANSPORT - CONNECTIVITY INTERLOCK
- 684FUNCTIONS LOCKED OUT - CONNECTIVITY INTERLOCK
- 685ALL FUNCTIONS LOCKED OUT - CONNECTIVITY INTERLOCK
- 772STALLED TRACTION MOTOR OR POWER WIRING ERROR
- 773CAPACITOR BANK FAULT - CHECK POWER CIRCUITS
- 776STALLED PUMP MOTOR OR POWER WIRING ERROR