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. 1. Remove the LV battery connections. For short to Battery: Step No. Description Check point If Yes If No 1 Remove the LV connector of PDU Check if there is continuity between PDU connector’s input pin 10, 11 and Pin 1 Problem is in the PDU. Action: Replace the PDU and Go to step 1. Go to Step 2 2 Remove the PDU side LV connector Check if there is continuity between PDU LV connector Pin C443-10, C443-11 and C433-1 Problem is in the wiring or the connector Action: Replace the LV connector/wiring and Go to step 2. Go to Step 3 3 Remove VCU side and PDU side LV connectors Check if there is continuity between these connectors No problem in the wiring between the PDU connector and VCU connector. Go to Step 4 4 If there are any inline connectors, remove each of them Check if there is continuity between consecutive connectors No problem in wiring between the inline connectors Go to Step 5 5 Remove the VCU connector. Check if there is a continuity between K77 Pin No. of VCU and the VCU supply pin Problem in VCU connector or VCU. (Change VCU connector or VCU) Action: Go to step 5 For circuit open: Step No. Description Check point If Yes If No
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