Vehicle Platform: All ECU Name: Telematics Control Unit (TCU) DTC Troubleshooting Data Version: 1.12 Date: 02-06-2022 Author: TCM COC Page: 141 of 150 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. B2844- 13:Horn Hardwired- Circuit open Overview: ISO Code B2844–13 Horn Hardwired - Circuit open Customer Symptom Telematics ECU features will not be working Fault Effects (On Vehicle) Following Telematics features will not be working: Vehicle Feature Usage Analytics Fault Detection Condition DTC is set in case of Horn Hardwired Input Pin is open Normal Operating Condition Horn hardwired input data is properly transmitting in normal condition Probable Trouble Area Faulty TCM TCM Connector Fault Horn Hardwired Input pin (pin:27) is open Internal Component failure TCM pin have problem with oxidation, bending & damage Healing Condition Verify DTC ageing-Clear in case of ageing Verify any other communication related DTCs present Verify TCM DTCs and check for any related DTCs Follow TCM trouble shooting guideline to clear the relevant functional DTCs Replace TCM connector If problem persists after above steps (from 1 to 5) then replace TCM
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