`32 1 Author: Neha Patil/Ganesh Kalkekar 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. Kanger 3.0 LR DTC Troubleshooting Data Version: 1.0 Date: 18-07-2023 U0028 – 88 :- Vehicle Communication Bus "A" - bus off Overview: ISO Code (If applicable) U0028 – 88 Customer Symptom Vehicle gets Stop. Fault Effect (On Vehicle) Vehicle goes from D-N Mode and Vehicle can’t be Cranked. Lamp Status (If Any) HV critical alert lamp on cluster glows DTC Trigger Condition CAN bus signal wrong (bit stuff fault, data frame fault, ACK fault, etc.) in 5 ms polling cycle, 100 ms recover. Probable Trouble Area Wiring Harness is broken Electromagnetic interference/Line damage Healing Condition Ignition Reset Write up for the system:- E-drive is a three in one unit which consist of Electric motor, Motor Controller Unit and Gear- Box, Where this unit draws power from the High voltage battery and convert that electric power into kinetic energy which helps to rotate the vehicle. During braking vehicle kinetic energy convert in to electric energy.
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