Vehicle Platform: All ECU Name: Telematics Control Unit (TCU) DTC Troubleshooting Data Version: 1.12 Date: 02-06-2022 Author: TCM COC Page: 126 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. B2842- 11:E-Call switch – Circuit short to ground Overview: ISO Code B2842–11 E-Call switch– Circuit short to ground Customer Symptom Telematics ECU features will not be working Fault Effects (On Vehicle) Following Telematics features will not be working: Not initiating e-Call event, MSD message, SOS SMS,Panic Notification. Fault Detection Condition DTC is set in case of E-Call input from BCM pin is shorted to ground Normal Operating Condition TCM receiving E-Call hardwired input by Hard button press in normal condition Probable Trouble Area Faulty E-Call switch Faulty TCM TCM Connector Fault E-Call input from BCM (pin:9) is shorted to ground 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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