NEXON 3.0 EV DTC Troubleshooting Document for VCU Version: 2.0 Date: 22-Sep-2023 Copyright © TATA MOTORS Ltd. This document must not be used in anyway, such as copying and redistributing to third parties, without the consent of author. P3056 - 17: - PLC Chip-EVSE parameter above vehicle demand - circuit voltage above threshold Overview: ISO Code P3056 - 17 Customer Symptom Vehicle would not go into charging mode in fast charging Fault Effects (On Vehicle) The vehicle is drivable and slow charging is possible but DC Fast charging will not happen Lamp Status (If Any) Vehicle charging fault Indication lamp l is ON Fault Detection Condition Fast Charger supplied High voltage is greater than High voltage requested by the vehicle Normal Operating Condition Fast Charger supplied high voltage and EV requested voltage are same Probable Trouble Area EVSE charger Healing Condition If DTC trigger condition is healed, DTC is present only in memory Component Details: NA Preliminary Checks: Disconnect the gun. Switch off the vehicle. Put the vehicle in Ignition. Clear DTCs. Again, try DC fast charging. If charging is not happening, Read DTC. If same DTC appears check the EVSE charger. Trouble Shooting: - 1. Remove the LV battery connections. Step No. Description Check point If Yes If No 1. Check for EVSE Charger side DTCs. Connect EVSE Charger side diagnostic tool to the charger and check if any DTC's present Clear DTC's on charger and check again Restart the charging station and check again
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