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NEXON EV
X114H: DTC Troubleshooting Document for BMS
Version: 3.0
Date: 01
th
July 2020
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.
P121E - 21:- BMS battery discharging temperature low second level alarm - signal amplitude < minimum ...................................................................................................................... 30 P121F - 21:- BMS battery discharging temperature low third level alarm - signal amplitude < minimum ......................................................................................................................................... 31 P1220 - 22:- BMS temperature difference high first level alarm - signal amplitude > maximum ............................................................................................................................................ 32 P1223 - 19:- BMS discharging current overload first level alarm - circuit current above threshold ............................................................................................................................................ 34 P1224 - 19:- BMS discharging current overload second level alarm - circuit current above threshold ............................................................................................................................................ 35 P1225 - 19:- BMS discharging current overload third level alarm - circuit current above threshold ............................................................................................................................................ 36 P1226 - 19:- BMS feedback current overload first level alarm - circuit current above threshold ............................................................................................................................................ 37 P1227 - 19:- BMS feedback current overload second level alarm - circuit current above threshold ............................................................................................................................................ 38 P1228 - 19:- BMS feedback current overload third level alarm - circuit current above threshold ............................................................................................................................................ 39 P1229 - 1A:- BMS insulation fault first level alarm - circuit resistance below threshold .... 40 P122A - 1A:- BMS insulation fault second level alarm - circuit resistance below threshold .............................................................................................................................................................. 41 P1231 - 1A:- BMS insulation fault third level alarm - circuit resistance below threshold .. 42 P1232 - 27:- BMS SOC jump fault - signal rate of change above threshold .......................... 43 P1233 - 17:- BMS power supply high fault - circuit voltage above threshold ....................... 44 P1234 - 16:- BMS power supply low fault - circuit voltage below threshold ......................... 45 P1235 - 13:- BMS_NegMainRlyConglut - circuit open ............................................................... 46 P1236 - 13:- BMS_PosMainRlyConglut - circuit open ................................................................ 47 P1237 - 13:- BMS_HVILAlarm - circuit open ................................................................................ 48 P1238 - 16:- BMS_PrechargeFaultAlarm - circuit voltage below threshold ......................... 49 P1239 - 09:- BMS_BMUFault - Component Failures .................................................................. 50 U1301 - 87:- BMS lost communication with VCU - missing message .................................... 51 U1302 - 87:- BMS host lost communication with slave –missing message .......................... 52 APPENDIX-A: COMPONENT DETAILS AND INFORMATION ...................................................................... 54 Place images of LV and HV connector. Show MSD location. Explain functionalities. ........................... 54 APPENDIX-B: MSD DISCONNECTION PROCEDURE .................................................................................. 54 4- step procedure for removing MSD: ............................................................................................ 54