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. P305B - 38: - CCS DC Fast Charging –CP signal Frequency - Signal Frequency Incorrect Overview: ISO Code P305B - 38 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) Charging fault Indication lamp is ON, on the cluster Fault Detection Condition DC FAST charging stopped since CP frequency is not in the plausible range Normal Operating Condition DC fast charging is happening Probable Trouble Area EVSE charger for correct charge type Wiring of CP line Healing Condition If DTC trigger condition is healed, DTC is present only in memory Component Details: 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 Charger Specification for CCS-II standards Check for Charger side CP frequency Range Go to step 2 Charger is not compatible for charging according to CCS-II standards.
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