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. Action: go to step 31 connection or backout, replace DC-DC to MSD short link harness 31 Remove MSD short link connector Check continuity of short link, between C802A-1 and C802a-1 MSD short link is ok Action: go to step 32 Problem is in MSD short link Action : Replace MSD short link 32 Remove VCU and MSD short link connector Check continuity between C776B-56 and C802-1 No problem in VCU to MSD short link harness Action: go to step 33 Problem is in VCU to MSD short link harness Action: Check for terminal loose connection or backout, replace VCU to MSD short link harness 33 Observe the pin on the VCU side Check for pin backout on the VCU side Action: Replace the VCU and go to step 33 Problem is in VCU connector Action: replace VCU connector DTC’s confirmation: - After rectification, ensure that DTC is not present in VCU memory using TML diagnostic tool before handing over to customer. Circuit Schematic Diagram:
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