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. Contents U1006 - 04: - Control Module Internal - System Internal Failures ......................................................... 12 U1006 - 47: - Control Module Internal - watchdog / safety Microcontroller failure .............................. 16 U0028 - 13: - Vehicle Communication Bus A - circuit open ................................................................... 20 U0028 - 88: - Vehicle Communication Bus A - bus off ........................................................................... 24 U0037 - 13: - Vehicle Communication Bus B - circuit open .................................................................... 28 U0037 - 88: - Vehicle Communication Bus B - bus off ........................................................................... 32 U0046 - 13: - Vehicle Communication Bus C - circuit open .................................................................... 37 U0046 - 88: - Vehicle Communication Bus C - bus off ............................................................................ 40 P3045 - 44: - Read diagnosis for non-volatile memory (EEPROM) - data memory failure ..................... 43 P3046 - 44: - Write diagnosis for non-volatile memory (EEPROM) - data memory failure .................... 47 P3003 -14: - Accelerator Pedal Sensor 1- circuit short to ground or open circuit .................................. 51 P3003 -12: - Accelerator Pedal Sensor 1 - circuit short to battery ......................................................... 57 P3003 - 29: - Accelerator Pedal Sensor 1 - signal invalid ....................................................................... 63 P3004 – 8F: - Accelerator Pedal Sensor 1 and Sensor 2 values inconsistent - erratic ............................ 68 P3006-14: - Accelerator Pedal Sensor 2 - circuit short to ground or open circuit ................................ 72 P3006-12: - Accelerator Pedal Sensor 2 - circuit short to battery ........................................................ 78 P3006- 29: - Accelerator Pedal Sensor 2 - signal invalid ........................................................................ 84 P3008 -11: - Power Distribution Unit Positive Busbar Thermistor - circuit short to ground .................. 89 P3008 -15: - Power Distribution Unit Positive Busbar Thermistor - circuit short to battery or open ..... 95 P3008 - 29: - Power Distribution Unit Positive Busbar Thermistor - signal invalid .............................. 101 P3009 - 11: - Power Distribution Unit Negative Busbar Thermistor - circuit short to ground .............. 105 P3009 -15: - Power Distribution Unit Negative Busbar Thermistor - circuit short to battery or open . 110 P3009- 29: - Power Distribution Unit Negative Busbar Thermistor - signal invalid ............................. 116 P3017 - 85: - DC Charging Inlet temperature sensor 2 - signal above allowable range ........................ 120 P3017 - 84: - DC Charging Inlet temperature sensor 2 - signal below allowable range ........................ 127 P3016 - 85: - DC Charging Inlet temperature sensor 1- signal above allowable range......................... 134 P3016 - 84: - DC Charging Inlet temperature sensor 1 - signal below allowable range ........................ 141 P3026 - 13: - Battery cooling chiller solenoid valve activation line - circuit open ................................ 148 P3026 - 12: - Battery cooling chiller solenoid valve activation line - circuit short to battery ............... 153 P3026 - 11: - Battery cooling chiller solenoid valve activation line - circuit short to ground ............... 158 P3028 - 13: - Cabin cooling Evaporator solenoid valve activation line - circuit open ........................... 163 P3028 - 12: - Cabin cooling Evaporator solenoid valve activation line - circuit short to battery .......... 168
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