Nexon_MCE2_7inch_Digital Instrument Cluster_DTC Trouble Shooting Data Version: 1.0 Date: 09-May-2023 Author: Suraj Patil / Rajesh Patil Page: 129 of 167 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 Engine Coolant temp lamp ON, No Indication on Temp bar graph display, AFE, IFE screen display will be --. --, Current gear display will be ‘F’ Fault Effects (On Vehicle) Engine Coolant temp lamp ON, No Indication on Temp bar graph display, AFE, IFE screen display will be --. --, Current gear display will be ‘F’ Lamp Status (If Any) Engine Coolant temp lamp ON 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 Trouble Shooting: - Start Connect the diagnostic tool Read DTCs and check whether it’s permanent or in history Check relevant functional DTCs in the ECM ECU Follow the procedure to diagnose relevant functional DTCs in the ECM ECU NO YES Is DTC Permanent? Clear DTC Stop (DTC in history) U0401-81-Invalid Data Received From ECM
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