Vehicle Platform: All ECU Name: Telematics Control Unit (TCU) DTC Troubleshooting Data Version: 1.12 Date: 02-06-2022 Author: TCM COC Page: 89 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. B2841 - 00 :- Internal Battery Temperature High - no sub type information Overview: ISO Code B2841 – 00 Internal Battery Temperature High - no sub type information Customer Symptom Telematics ECU features will not be working Fault Effects (On Vehicle) Remote , Vehicle security, Alerts and other telematics features will not be working Fault Detection Condition DTC is set in case of Internal Control Module Battery temperature is high Normal Operating Condition TCU having proper internal battery inserted in normal condition and the temperature is in normal range (TO BE UPDATED) Probable Trouble Area Faulty TCU Internal battery damaged Internal battery connector damaged Internal battery terminals is open or shorted to ground Healing Condition 1. Verify DTC ageing-Clear in case of ageing 2. Verify any other communication related DTCs present 3. Verify TCU DTCs and check for any related DTCs 4. Follow TCU trouble shooting guideline to clear the relevant functional DTCs 5. Replace battery connector and internal battery 6. If problem persists after above steps (from 1 to 5) then replace TCU
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