An undervoltage condition (sulfated battery, loose terminals) can cause the brake coil to draw abnormal current. Always verify the battery is fully charged and load-tested before deep diving into the brake system.
| Step | Action | |------|--------| | 1 | – Turn off, wait 30 seconds, restart. Check if error returns immediately or only under load. | | 2 | Visual inspection – Check the encoder cable and connector at the drive motor for damage, corrosion, or loose pins. | | 3 | Resistance check – Measure encoder winding resistance (if resolver type) between reference and sine/cosine pins per manufacturer specs (usually 20–100 ohms). | | 4 | Continuity test – Check each encoder wire from motor connector back to controller connector. | | 5 | Shielding check – Verify the encoder cable shield is intact and grounded only at the controller side. | | 6 | Swap test (if available) – Replace drive motor with a known good unit or test motor encoder separately. | jungheinrich eje 120 error code 4372
Ensure there is no physical debris or damage preventing the tiller handle or lift/lower buttons from returning fully to their home positions . Check if error returns immediately or only under load
: Attempt to recalibrate the steering and tiller head sensors. This process helps the controller re-learn the correct neutral and travel limit values. | | 4 | Continuity test – Check