Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 650 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent U0073-00: Vehicle Communication Bus A- Bus off Overview: DTC Code U0073-00 DTC Description as Per ISO Standards Vehicle communication Bus A – Bus off Customer Symptom Check engine lamp will be ON . Fault Effects (On Vehicle) Vehicle will not start Lamp Status (If Any) CE Lamp ON Fault Detection Condition 1. Short circuit between CAN_H -CAN_L, CAN_H –GND, CAN_L-Vbatt, CAN_L-GND and/or CAN_H- Vbatt 2. Open circuit of CAN_H/ CAN_L/ both lines Normal Operating Condition ECM ECU communicates properly with other partner ECUs in the CAN network Probable Trouble Area CAN_H and CAN_L wires Healing Condition 1. Removal of the above mentioned shorts in the wiring harness or at ECU pin. 2. Reconnecting CAN_H/ CAN_L/ both lines to ECM ECU
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