On many ETV/EJE models with CAN-bus displays:
Disconnect the battery and measure the resistance across the CAN-High and CAN-Low lines. A healthy, fully connected CAN network should read roughly due to its two parallel 120-Ohm terminating resistors. If your meter displays 120 Ohms , it reveals a physical break in the network loop line. Step 4: Validate Battery State of Health
An interruption in low-voltage control power will trigger communication faults. jungheinrich error code 0802
Visually inspect the wiring bundle passing through the articulation points or under the floorboards for pinching.
When the display board is intact but the code persists, check the wiring: Disconnect the truck battery for safety. On many ETV/EJE models with CAN-bus displays: Disconnect
Corrupted data or loose connections along the Controller Area Network (CAN-bus) lines will interrupt the safety signal.
What is the of your Jungheinrich truck (e.g., EJE 120, EFG 216)? Step 4: Validate Battery State of Health An
If the code persists after a reset and fuse check, you may need a certified technician to use the Jungheinrich JETI/Judit diagnostic tool
Issues with the multi-pilot joystick , display unit, or even a small ignition contactor. Troubleshooting Steps
A practical technique sometimes used by field technicians is to from other points on the same truck or from a similar, functional truck. For example, if a faulty steering controller is suspected, it can be moved to the hydraulic function. If the 0802 error remains but is accompanied by a new 0803 or 0804 hydraulic fault, this strongly suggests the controller hardware or its software configuration is the cause.