Vehicle Platform: Tiago,Tigor & Osprey ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 2.0 Date: 22-10-2018 Author: Parag K Page: 43 of 737 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. U0401-81:- Invalid Data Received From ECM Overview: ISO Code U0401-81 Customer Symptom Rear Defogger does not turn ON Fault Effects (On Vehicle) Rear Defogger does not turn ON Lamp Status (If Any) N.A Fault Detection Condition Relevant functional DTCs present in ECM Normal Operating Condition ECM ECU sends correct data in normal condition. Probable Trouble Area Incorrect data received from ECM. Healing Condition After rectifying relevant functional failures in the ECM ECU
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