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. Step No. Description Check point If yes If No 1 Remove the LV connector of VECU and Telematics Check continuity between connectors at harness side of C776A-52 to C739-36 No problem with wiring harness Go to step 3 Go to step 2 2 If there are any inline connectors, remove each of them Check if there is continuity between consecutive connectors Go to Step 3 Problem is with wiring between the inline connectors Action: change LV wiring harness connector and repeat step 3 3 Remove the LV connector at telematics Check for Pin damage or backout of the telematics ECU pin C739-36 Problem with telematics ECU Action: Replace Telematics ECU Go to step 4 4 Remove the LV connector at VECU Check for backout of the VECU Pin No K52 Problem with VECU Action: Replace VECU End DTC’s confirmation: - After rectification, send Clear the DTC command by using TML diagnostic tool. Ensure no DTC is in defect/ confirmed state before handing over to customer. Circuit Schematic Diagram:
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