Check to see if the is properly latched, as unfastened seatbelts can prevent the pedal from engaging correctly. When to Call a Professional Technician
Look for damaged wires leading from the pedal assembly.
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: Specifically refers to drive pedal activation during the initial startup sequence. Jungheinrich Error Code 1901
The "zero point" of the potentiometer (the sensor that measures pedal depth) may have drifted. A technician using Jungheinrich JET Diagnostic Software can recalibrate the pedal travel. 3. Electrical Faults
In material handling, warehouse efficiency depends heavily on electric forklifts and pallet jacks. is a premium brand known for reliable equipment. However, built-in safety systems can stop operations when a component fails. One common alert is Jungheinrich Error Code 1901 (often displayed as 1901.1 ).
To help you quickly diagnose the issue, here's a simple flow chart you can follow on your own: Check to see if the is properly latched,
Jungheinrich typically indicates a Startup Safety Violation , specifically that the drive pedal was already activated (pressed) when the truck was switched on or the startup sequence began . Quick Fix (The "Operator Error" Check) Turn the truck OFF . Ensure your feet are completely off the drive pedals . Ensure the directional switch is in Neutral . Turn the truck ON again. Detailed Troubleshooting Guide
In some models, particularly older ones, Error 1901 might be linked to other safety interlocks. For instance, a faulty "slow travel" button that remains stuck when the truck is switched on can also generate this code. Additionally, a faulty seat switch can sometimes be a contributing factor, especially if the system is expecting the seat to be occupied before checking the pedal position.
In the vast majority of cases, especially with a newer or well-maintained machine, these simple steps will clear the error and restore normal operation. This error is often the result of a simple oversight during startup and can be resolved without any mechanical intervention. The "zero point" of the potentiometer (the sensor
Prevention is always better than a service call. A few simple habits can almost entirely eliminate the occurrence of Error 1901.
, are designed to prevent accidental movement when the operator turns the key or enters their code. If the system detects that the accelerator is already pressed down, it will lock out the drive function to avoid sudden, unintended acceleration. Machine Maxx USA Troubleshooting & Resolution To clear the 1901 error, follow these steps: Release the Pedal : Completely remove your foot from the accelerator pedal. Restart the Truck
According to standard Jungheinrich Forklift Error Code guides , indicates that the Drive Pedal was activated during startup .