Emergency Stop Circuit Open or E-Stop Activated
What does MANITOU-EE mean?
The MANITOU-EE (Manitou) EV fault code means: Emergency Stop Circuit Open or E-Stop Activated. This is a serious severity code.
Common Symptoms
- Instrument cluster LCD displays EE and the machine will not start
- All hydraulic functions are locked out, boom and forks will not move
- Engine cranks but immediately shuts down, or does not crank at all
- Red warning light is solid on the instrument panel
- Audible alarm sounds when operator attempts to start the machine
- Cab display shows EE code even after key is cycled to OFF and back to RUN
- Machine was operating normally and then stopped abruptly with no other warning
Probable Causes (Ranked by Likelihood)
- Cab-mounted E-stop button pressed and not physically released or twisted to reset Very Likely
- Remote E-stop button on the machine frame or boom head is pressed or stuck in the activated position Very Likely
- E-stop safety loop wiring is broken, corroded, or has a loose connector somewhere in the circuit Likely
- E-stop mushroom button contacts worn or internally failed so the loop reads open even when button appears released Likely
- Water or debris intrusion into an E-stop connector causing a false open circuit reading Possible
- TCON or GCON controller has a software fault misreading the E-stop loop state Less Likely
- Damaged wiring harness routed near the boom pivot point, worn through from articulation cycles Less Likely
Step-by-Step Diagnostic Procedure
Start at the obvious. Walk around the machine and locate every E-stop button, typically one in the cab, one on the right-hand rear frame, and one at the boom head or platform if a work platform is fitted. Confirm each button is fully released by twisting the mushroom head clockwise until it pops out. A button that looks released but has not fully popped is still activating the circuit.
Cycle the key to OFF, wait 10 seconds, then turn back to RUN. Watch the cluster LCD. If EE clears and does not return within 5 seconds, the fault was a latched button and the machine is ready to work. If EE returns immediately, continue diagnosing.
Check the E-stop connectors. With the key OFF, trace the wiring from each E-stop button and unplug each connector one at a time. Look for green corrosion, bent pins, or moisture inside the connector body. Dry any wet connectors with compressed air and reconnect firmly.
Measure continuity across the E-stop loop. With the key OFF and all E-stop buttons released, use a multimeter set to continuity or resistance. Back-probe the E-stop loop wires at the TCON or GCON controller harness connector. You should read near 0 ohms (continuity) across the normally-closed loop. An open reading (OL on your meter) confirms a break in the loop. Trace the harness from the controller back toward each button to find the open section.
If the machine has a boom-mounted E-stop or a work platform attachment, inspect that harness carefully where it runs along the boom sections. Boom flexing over time can crack insulation or pull a connector apart at the elbow. Look for chafing against metal edges.
If all buttons appear released and continuity checks good, suspect the E-stop button contacts internally. Remove one button at a time and use your multimeter to check resistance across the button terminals with the button in the released position. You should read continuity. Resistance above 5 ohms or an open reading means the button contacts are worn and the button needs replacement.
If the loop wiring and all buttons check out electrically, connect Manitou MASTERTECH service software to the machine CAN port and read live controller inputs. Verify the TCON or GCON is seeing the E-stop input as closed. If the hardware checks good but the controller still shows the input as open, a controller software reflash or module replacement may be needed. This step requires a Manitou dealer with MASTERTECH access.
Do not bypass or jumper the E-stop loop to clear the code. The E-stop circuit is a safety system. Bypassing it creates an unsafe machine and will void any liability protection. Replace faulty components, repair broken wiring, and verify the loop is functioning correctly before returning the machine to service.
Frequently Asked Questions
What does Manitou code EE mean?
EE means the E-stop circuit is open. Either an emergency stop button on the machine has been pressed and not reset, or there is a break in the safety loop wiring that runs between the E-stop buttons and the machine controller. The machine will not start or operate until the circuit is restored.
Can I still operate the telehandler with code EE showing?
No. The TCON or GCON controller locks out all machine functions when EE is active. The engine will not run and hydraulics will not move. This is intentional safety behavior. You must clear the fault before the machine will operate.
How do I reset the EE code on a Manitou telehandler?
Locate all E-stop mushroom buttons on the machine, twist each one clockwise until it physically pops out to the released position, then cycle the key OFF and back to RUN. If the EE code clears, you are ready to work. If it comes back, a wiring or button fault is present and needs to be diagnosed before you operate.
How much does it cost to fix Manitou code EE?
If it is just a stuck E-stop button, there is no cost beyond a few minutes of your time. Replacing a worn E-stop button switch runs about $20 to $80 in parts and is a straightforward repair. If a wiring harness is damaged, a dealer repair can run $150 to $600 or more depending on where the break is located.