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. Check for loose connection of LV wiring harness between VCU and PDU LV connector Check for damage to LV wiring harness connections between VCU and PDU LV connector Visually inspect 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 PDU Check continuity between Chassis and LSD pin of PDU LV connector. Problem is in the PDU. Action: Replace the Solenoid and Go to step 1. Go to Step 2 2 Remove VCU side and PDU side LV connectors Check if there is continuity between chassis and LSD pin of harness side actuator connector Problem in the wiring between the 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 E-drive contactor enable pin Check if there is continuity between chassis and LSD pin in harness side VCU connector C443-12 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 LSD pin A25 of VCU and the chassis Problem in VCU Change VCU
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