NEXON 2.0 EV DTC Troubleshooting Document for VCU Version: 1.0 draft Date: 31-Jan-2022 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. 7. If there are any inline connectors, remove each of them Check if there is continuity between consecutive connectors No problem in wiring between the inline connectors Problem may be in VCU sensing circuit Problem is in PDU to VCU wiring harness inline connectors Action: Change PDU to VCU inline wiring harness 8. Remove VCU side and HV battery side LV connectors (make sure other connectors removed in previous steps are connected) Check if there is continuity between C776B-6 and C435A-E, B-14 and C443-7, B-50 to C443-3 of the connector. No problem in the wiring between the HV battery LV connector and VCU connector. Go to Step 9 Problem is in HV battery to PDU wiring harness Action: Change HV battery to PDU wiring harness 9. If there are any inline connectors, remove each of them Check if there is continuity between consecutive connectors No problem in wiring between the inline connectors Problem may be in VCU sensing circuit Problem is in HV battery to VCU wiring harness inline connectors Action: Change HV battery to VCU inline wiring harness 10. Remove HV battery side LV connector. MSD should be connected(High voltage connector should be properly connected, both +ve and -ve) Check for continuity between C435A-E and C435A-F of HV battery (on HV battery side LV connector) No problem in HVIL wiring of HV battery Go to Step 11 HV battery inside HVIL is broken, internal wiring issue. Check if HV battery HV connectors and MSD are connected
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