TML Gen3 IVI DTC Troubleshooting guide Version: 0.4 Draft Date: 04-Aug-23 Author: Hemant Mitra Page: 540 of 584 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. U0424 - 81:- Invalid Data Received From HVAC Overview:- ISO Code U0424-81 Customer Symptom No customer symptom Fault Effects (On Vehicle) No effects. Lamp Status (If Any) N.A Fault Detection Condition Relevant functional DTCs present in HVAC Normal Operating Condition HVAC ECU sends correct data in normal condition. Probable Trouble Area Incorrect data received from HVAC. Healing Condition After rectifying all the functional failures in the HVAC ECU Trouble Shooting:-
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