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. Action: Repair harness 2. Check for continuity between Inlet temperature DC negative bus sensor and EVCU Check for continuity between Charging gun inlet temperature DC negative sensor ground and signal pins C448A-3, C448A-2 and respective EVCU side signal pins C776A-15, C776A-51 Problem is in Charging Gun Inlet Temperature Sensor Action: Replace Sensor and try Fast Charging again Problem is in wiring harness between Charging gun inlet temperature DC negative bus sensor and EVCU Action: Repair harness DTC’s confirmation: - After rectification, read DTC using TML diagnostic tool and Clear the DTC Ensure no DTC is in defect/confirmed state before handing over to customer Circuit Schematic Diagram: Component Location: - Vehicle charging inlet, DC Fast charging socket of vehicle.
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