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. U1322 - 08: - Lost Communication with Battery Management System (BMS) module - Bus Signal / Message Failures ................................................................................................................................ 831 U132B - 08: - Lost Communication with compressor module - Bus Signal / Message Failures ............ 837 U1321 - 08: - Lost Communication with Motor control Unit (MCU) module - Bus Signal / Message Failures ............................................................................................................................................... 842 U0151 - 08: - Lost Communication with Supplementary Restraint System (SRS) module - Bus Signal / Message Failures ................................................................................................................................ 847 P3041 - 68: - VECU received BMS derate flag CAN Signal from BMS – event information ................... 852 P3089 - 68: - VECU EEPROM write successful for Crash Detection - event information ...................... 854 P3086 - 68: - Difference in High voltage between PDU and HV battery - event information ............... 856 P308A - 68: - Low mismatch in requested torque from VECU and E-drive feedback Torque - event information ......................................................................................................................................... 861 P308B - 68: - High Mismatch in requested torque from VECU and E-drive feedback Torque - event information ......................................................................................................................................... 863 P308C - 1A: - VECU received Low isolation resistance fault CAN signal from BMS - circuit resistance below threshold .................................................................................................................................. 865 P3084 - 68: - High Voltage battery Level 3 Fault CAN signal received by VECU - event information ... 867 P3085 - 68: - E-drive MCU Level 3 Fault CAN signal received by VECU - event information ................ 870 P303F – 13: - Telematics ECU hardware wakeup activation line - circuit open ................................... 872 P303F – 12: - Telematics ECU hardware wakeup activation line - circuit short to battery .................. 877 P303F – 11: - Telematics ECU hardware wakeup activation line - circuit short to ground ................... 882 P301E - 13: - Vehicle HVIL Sense PWM - circuit open .......................................................................... 887 P301F - 13: - PDU HVIL Sense PWM - circuit open ............................................................................... 898 P30AF - 15: Cruise Switch sensor input to VECU - circuit short to battery or open ............................. 903 P30AF - 11: Cruise Switch sensor input to VECU - circuit short to ground ........................................... 909 P30B0 - 15: Regen Switch sensor input to VECU - circuit short to battery or open ............................. 915 P30B0 - 11: Regen Switch sensor input to VECU - circuit short to ground ........................................... 921 P30B1 - 15: Eco/Sports Switch sensor input to VECU - circuit short to battery or open ...................... 927 P30B1 - 11: Eco/Sports Switch sensor input to VECU - circuit short to GND........................................ 933 P30B8 - 12: AC Linear Pressure Sensor value input to VECU - circuit short to battery ......................... 938 P30B8 - 16: AC Linear Pressure Sensor value input to VECU - circuit voltage below threshold ........... 942 P30B5 – 4B: AC charging inlet temperature is greater than threshold ................................................ 947 P30B4 – 15: AC charging inlet temperature sensor on line connection – circuit short to battery or open ............................................................................................................................................................ 951
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