A healthy CAN-bus network with two functional parallel terminating resistors should register approximately 60 Ohms . If your meter reads 120 Ohms , one of the terminating links or module connections is wide open. A reading near 0 Ohms indicates a direct short circuit in the wiring harness.
: Use Jungheinrich JUDIT diagnostic software to check for lost CAN bus packets or specific parameter settings. Summary of Effects When 0802 is active, you may experience:
Open the main electrical compartment and locate the fuse block. jungheinrich error code 0802
Unlike a soft warning (e.g., low battery), code 0802 is a . The machine will not move under its own power until the fault is resolved.
Before you start diagnostics, confirm that your truck displays these behaviors alongside error 0802: A healthy CAN-bus network with two functional parallel
Code 0802 is triggered when the controller detects one of the following electrical anomalies:
Step 2: Perform a Visual Inspection of the Display Logic Board : Use Jungheinrich JUDIT diagnostic software to check
If you have access to Jungheinrich’s or a dealer diagnostic tool, pull the sub‑error code (e.g., 0802‑01, 0802‑05) – that will identify exactly which control unit is timing out and save hours of guessing.
The underlying hardware (drive motor with a PT100 or KTY temperature sensor) is similar across these models, so the diagnostic approach is largely universal.
After replacing a motor controller (part number 51169229), the truck still showed 0802. Swapping with a working controller from a similar reach truck worked fine. Diagnosis: JUDIT revealed that the new controller had the wrong firmware – it was programmed for the hydraulic system, not for drive/braking. Solution: Ordered the correct controller with the proper software. Lesson: Part numbers alone are not enough; firmware versions must match.