On many ETV/EJE models with CAN-bus displays:
If calibration fails or the display shows no response, proceed to software diagnostics.
If all wiring is intact, battery voltage is good, and connectors are tight: jungheinrich error code 0802
The traction motor is equipped with a PTC (Positive Temperature Coefficient) thermistor or an NTC (Negative Temperature Coefficient) sensor to monitor winding temperature. The controller (e.g., Jungheinrich FSF or ZAPI AC-2/AC-3) sends a low-voltage reference signal through this sensor.
Code 0802 is triggered when the controller detects one of the following electrical anomalies: On many ETV/EJE models with CAN-bus displays:
Key distinction: Unlike code 0803 (Motor overtemperature – actual overheating), code 0802 is an electrical circuit fault, not necessarily a thermal event.
| Identified Cause | Repair Action | Estimated Time | | :--- | :--- | :--- | | Chafed / broken wire | Repair with heat-shrink butt splice or replace harness section. | 1–2 hours | | Corroded connector pin | Clean with electrical contact cleaner; replace pin/connector if damaged. | 0.5 hour | | Faulty motor sensor (PTC/NTC) | Replace complete drive motor (sensor is integrated into winding) – or rewind motor. | 4–6 hours | | Controller failure | Replace or repair traction controller (requires programming of parameters). | 2 hours + programming | If calibration fails or the display shows no
Moisture, battery acid fumes, or simple vibration can cause poor contact at the multi-pin connector on the drive controller (often labeled “Motor Temp” or “Temp Sensor”). A high-resistance connection leads to a plausibility error.