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. HSD pin of harness side connector 3 If there are any inline connectors, remove each of them Check if there is continuity between LV battery positive (As LV battery positive is open use the harness side positive) and HSD pin of consecutive connectors Problem in wiring between the inline connectors Action: change LV wiring harness connector and repeat step 3 Go to Step 4 4 Check if power supply pin short with reverse lamp enable pin Check if there is continuity between LV battery positive (As LV battery positive is open use the harness side positive) and HSD pin in harness side VCU connector Problem is in VCU side LV wiring harness connector Action: change LV wiring harness connector and repeat step 4 Go to step 5 5 Remove the VCU connector. Check if there is a continuity between HSD pin K36 and the VCU supply pin Problem in VCU connector or VCU. (Change VCU connector or VCU) Action: Go to step 5 DTC’s confirmation: - After rectification, send Clear DTC command by using TML diagnostic tool. Ensure no DTC is in defect/ confirmed state before handing over to the customer. Circuit Schematic Diagram:
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