Jungheinrich Error Code 1901
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A properly functioning CAN bus requires 120-ohm termination resistors at both ends of the network. If one resistor is missing, damaged, or has the wrong value, signal reflections cause "bit errors" that escalate into a full timeout (Error 1901).
Jungheinrich Error Code 1901, like any machine fault, requires prompt attention to ensure the continued safe and efficient operation of the equipment. By understanding the potential causes, recognizing the symptoms, and following a systematic troubleshooting approach, operators and maintenance personnel can quickly resolve the issue and minimize downtime. Regular maintenance and adherence to manufacturer guidelines are key to preventing such errors and ensuring the longevity of Jungheinrich machines.
Ensure that no objects (such as clipboards, floor mats, or debris) are resting against the drive pedal. Jungheinrich Error Code 1901
of any obstructions and that your foot is not touching it.
You can reach Jungheinrich support through the online portal or via the Call4Service smartphone app. You can also find contact information for your regional office online.
On Jungheinrich forklifts and material handling equipment, Error Code 1901 typically indicates a hardware communication fault , specifically related to the vehicle's Controller Area Network (CAN-Bus) system. of any obstructions and that your foot is not touching it
The pedal potentiometer requires recalibration or replacement.
When the forklift's electronic control unit (ECU) detects an active signal from the accelerator pedal potentiometer during its initial self-test power-up sequence, it immediately blocks all travel functions and displays the event message or "1901.1" on the dashboard to protect the operator, surrounding warehouse personnel, and inventory. Technical Overview of Event Code 1901
Modern Jungheinrich forklifts utilize a potentiometer or Hall Effect sensor to track pedal position: surrounding warehouse personnel
If you have access to a known-good used or spare drive controller (same part number), swap it in. – Jungheinrich controllers are programmed for specific truck models and weight classes.
The Jungheinrich error code 1901 is a common fault signal found in electric pallet jacks and forklifts, particularly within the EJE and ERE series. This error specifically points to a communication or synchronization failure between the tiller (handle) electronics and the main traction controller. When this code appears, the truck will typically enter a safety lockout mode, preventing travel or hydraulic functions to ensure operator safety. Understanding the Technical Cause
The machine fails to move when the throttle is engaged.The display alternates between the hour meter and the 1901 code.The lift and lower functions may be disabled.The error may be intermittent, occurring only when the tiller is moved to specific angles. Step-by-Step Troubleshooting Checklist
: If the pedal is clear and the error persists, try switching the truck off and on again to reset the startup self-test. Potential Mechanical Issues
. This is a safety feature designed to prevent the forklift from moving unexpectedly when you turn it on. Machine Maxx USA Quick Fixes & Troubleshooting
