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. Check for loose connection of LV wiring harness between VCU and 3 in 1 combo-PDU LV connector Check for damage to LV wiring harness connections between VCU and 3 in 1 comboPDU LV connector Visually inspect 3 in 1 combo-PDU for damage Trouble Shooting: - 1. Remove the LV battery connections. Step No. Description Check point If Yes If No 1 Remove the LV connector of 3 in 1 combo-PDU Check continuity between Chassis and LSD pin of 3 IN 1 COMBO-PDU LV connector, pin No 21 Problem is in the 3 in 1 combo-PDU. Action: Replace the Solenoid and Go to step 1. Go to Step 2 2 Remove VCU side and 3 in 1 combo-PDU side LV connectors Check if there is continuity between chassis and LSD pin of harness side actuator connector C813 Pin 21 and C776B Pin 24 C813 Pin 20 and C776B Pin 65 (HSD) Problem in the wiring between the 3 in 1 combo-PDU connector and VCU connector. Go to Step 3 3 If there are any inline connectors, remove each of them Check if there is continuity between chassis and LSD 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 chassis is short with DC charging contactor enable pin Check if there is continuity between chassis and LSD pin in harness side VCU connector C813-21 Problem is in VCU side LV wiring harness connector Action: change LV wiring harness connector and repeat step 4 Go to step 5
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