JLG Telehandler 2336 Fault Code: Ground Controls - Load Moment Shutoff Input - Invalid Signal
Also called Load Moment Shutoff Input - Invalid Signal
Ground Controls - Load Moment Shutoff Input - Invalid Signal · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Code 2336 sets when the ground controls load moment shutoff input at J4-33 reads high at power up or stays high for 40 seconds or longer. The machine treats this as a system distress condition, disregards the LSI cancel switch override, forces the machine into load moment shutoff cutout, and latches until a power cycle.
High severity. This code forces the machine into load moment cutout and disregards operator override of the LSI cancel switch. It is not an immediate engine or hydraulic damage risk, but it directly affects load moment protection and machine function, so it should be diagnosed before returning the machine to lifting work.
What does JLG Telehandler error code 2336 mean?
Fault code 2336 relates to the Load Moment Shutoff Input on JLG telehandler ground controls. The load moment shutoff (LSI) system is a safety function that limits or stops boom and load movement when the machine senses it is approaching a tip-over or overload condition. The input in question comes into the controller at pin J4-33.
When the controller sees this input held high longer than it should be, it cannot trust the signal, so it treats it as an invalid signal fault rather than a normal LSI trip. It responds by disregarding the high signal at J4-33, defaulting the machine to LSI cutout, and ignoring any attempt to override that cutout using the LSI cancel switch.
Depending on whether the cabin station is active, the controller either monitors and reacts immediately to the signal at J4-10, or ignores it. It also either flashes the load moment shutoff indicator at J4-26 at 5Hz (cabin station active) or simply activates it steady (cabin station not active), and sets the load moment shutoff state to active or inactive accordingly.
What triggers a JLG Telehandler 2336 code?
J4-33 load moment shutoff input reads high at power up, or remains high for 40 seconds or longer. A related description of the same condition states the LSI cancel switch is depressed at startup or held depressed for longer than 40 seconds.
Common causes of 2336
- LSI cancel switch stuck depressed, mechanically sticking, or wired so it reads depressed continuously
- Wiring fault to pin J1-3 on the ground module, such as a short to power, chafed wire, or corroded connector causing a false high signal
- Failed or damaged mechanical LSI cancel switch that no longer opens and closes cleanly
- Signal at J4-33 held high at power up due to a wiring or switch condition present before the machine even starts its self check
How to troubleshoot JLG Telehandler 2336: first checks
- Check the LSI cancel switch itself for mechanical binding, sticking, or physical damage that would keep it depressed or shorted
- Inspect wiring and connectors running to pin J1-3 on the ground module for corrosion, chafing, pinched wire, or loose terminals
- Verify the switch releases fully and does not read high when it should be in the released, at-rest position
- Cycle machine power after inspection and watch whether the fault re-latches immediately at power up, which points to a static wiring or switch condition rather than an intermittent one
- If the cabin station is active, check the related signal path at J4-10 and the indicator behavior at J4-26 to confirm the controller is responding as expected
How the code clears
This fault latches until the machine is power cycled. After correcting the wiring or switch issue, cycle machine power to attempt to clear the code. If the underlying high signal condition at J4-33 is still present, the fault will set again on the next power up or after 40 seconds.
Frequently asked questions
What does JLG fault code 2336 mean?
It means the ground controls detected an invalid signal on the load moment shutoff input at J4-33, either high at power up or high for 40 seconds or longer. The machine responds by forcing load moment shutoff cutout and ignoring the LSI cancel switch override.
Can I clear code 2336 by just cycling the key?
You can attempt to clear it with a power cycle since that is the listed latch condition, but if the wiring or switch problem causing the high signal is still present, the fault will set again.
Does code 2336 disable lifting functions?
It forces the machine into load moment shutoff cutout state, which is a safety limiting condition on lifting capability, so yes, it affects how the machine handles load moment protection until resolved.
Where should I check wiring for this fault?
Check the wiring and connector integrity at pin J1-3 on the ground module, along with the mechanical LSI cancel switch itself, since these are specifically called out as the points to inspect.
Is the LSI cancel switch related to this code?
Yes. If the LSI cancel switch is depressed at startup or held depressed longer than 40 seconds, the controller treats it the same way as an invalid J4-33 signal and defaults the machine to LSI cutout.
Why does the load moment indicator flash instead of staying on?
If the cabin station is active, the controller flashes the load moment shutoff indicator at J4-26 at 5Hz as a distinct alert pattern. If the cabin station is not active, it simply activates the indicator steady.