X104 CNG (Nexon) 4” Instrument Cluster DTC Troubleshooting Data Version: 2.0 Date: 19-August-24 Author: Suraj Shivsharan Page: 144 of 160 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:- Start Connect the diagnostic tool Read DTCs and check whether it’s permanent or in history Check Relevant functional DTCs in the HVAC ECU Follow the procedure to diagnose relevant functional DTCs in the HVAC ECU NO YES Is DTC Permanent ? Clear DTC Stop (DTC in history) U0424-81-Invalid Data Received From HVAC
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