Jungheinrich Error Code 0802 ›

To avoid unexpected 0802 errors in the future, integrate these steps into your regular fleet maintenance program:

The main contactor acts as a heavy-duty, electronically controlled switch between the high-capacity battery pack and the forklift’s internal motor controllers.

When 0802 is triggered, the forklift will often enter a "safety mode," restricting or completely disabling hydraulic functions (lifting/lowering) to prevent further damage. Primary Causes of Error Code 0802

What is the of your Jungheinrich truck (e.g., EJE 120, EFG, ETV)?

Never spray high-pressure water directly at the tiller head, dashboard, or electrical compartments. Moisture ingress is a primary cause of CAN-bus short circuits. jungheinrich error code 0802

Reconnect the battery and turn the truck back on to see if the code clears. 2. Check Battery Health and Voltage Ensure the forklift is receiving adequate, stable power. Measure the total battery voltage using a multimeter.

If the hardware is intact, connect the Jungheinrich diagnostic software (JUDIT) via the service interface to recalibrate the tiller head travel parameters and clear the persistent fault log. Preventative Maintenance Practices

Understanding the root cause is necessary before deploying diagnostic tools. The issue can usually be traced back to three main areas:

This code is standard across many Jungheinrich series (ETX, EFG, EJE, ETV), but the physical location of the components will vary. Consult your specific truck's spare parts manual (available via the Jungheinrich "Profound" portal) for the exact layout of your model. To avoid unexpected 0802 errors in the future,

: If you suspect a wire breakage (specifically on digital output DO4), measure the resistance of individual valve coils. These typically range between 15 to 30 ohms .

If the meter reads 0 ohms or shows continuity while the truck is powered down, the contacts are welded closed . The contactor must be replaced. Step 3: Coil and Control Circuit Testing

Turn off the truck key switch and disconnect the battery plug.

Look for heavy corrosion on the battery terminals, which can restrict current flow. 3. Inspect Fuses and Relays A dead controller cannot communicate. Never spray high-pressure water directly at the tiller

The exact of your Jungheinrich truck (e.g., EFG, ETV, EJE)

: For certain models, you can access the service reset screen by pressing the "h/time" and "snail" buttons simultaneously, then entering the default 4-digit code (usually 1234 ). When to Call a Technician Resetting Jungheinrich Service Codes | PDF - Scribd

Understanding why code 0802 appears requires looking at the accelerator pedal’s electronic architecture. Most Jungheinrich trucks use a or dual potentiometer inside the pedal assembly. The controller expects a specific voltage range—typically 0.5V (idle) to 4.5V (full throttle). Code 0802 arises when: