The cable running from the main controller (located behind the dash or under the floor plate) to the drive motor passes through high-flexion areas. In reach trucks, this harness bends every time the mast tilts or the chassis articulates. Common failure points:
Would you like guidance on checking CAN bus resistance for your specific Jungheinrich model, or help locating the controller connectors?
Ensure the battery is fully charged and terminal connections are tight. Low voltage can trigger false "implausible signal" errors. Step 2: Inspect Control Handle Wiring
Electronic control units require stable power to communicate. A failing auxiliary ignition contactor or corroded master power fuse connections can restrict voltage to individual sub-controllers. While the main display stays lit, subordinate control boards remain unpowered and unresponsive. 4. Component Software Mismatches