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. 2. Check Continuity between EVCU's supply pins and Battery terminals Check continuity between EVCU's supply pin C776A-4,5,6 and battery positive terminal and continuity between EVCU's ground pin C776A-2,3 and battery negative terminal Problem is in EVCU. Action: Replace EVCU and try Fast Charging Problem is in wiring harness between Battery 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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