TML HARRIER Infotainment DTC Troubleshooting guide Version: 0.2 Draft Date: 31-Jul-18 Author: Vijaya Bhaskar B/Pritam Bansod Page: 81 of 113 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. U0028-88: Vehicle Communication Bus A - Bus off Overview: ISO Code U0028-88 Customer Symptom All warning lamps will be ON Fault Effects (On Vehicle) Interfacing functions with Body Control Module, HVAC Control Module and Instrument Panel Cluster Module will not work. Lamp Status (If Any) All lamps will be ON Fault Detection Condition 1. Short circuit between CAN_H -CAN_L, CAN_H - GND, CAN_L- Vbatt Normal Operating Condition ECU communicates properly with TML diagnostic Tool. Probable Trouble Area CAN_H and CAN_L wires Healing Condition 1. Removal of the above mentioned shorts in the wiring harness at ECU pin. 2. Reconnecting CAN_H/ CAN_L/ both lines Trouble Shooting:-
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