Vehicle Platform: All ECU Name: Telematics Control Unit (TCU) DTC Troubleshooting Data Version: 1.12 Date: 02-06-2022 Author: TCM COC Page: 76 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. B281E - 00:- Client certificate missing - no sub type information Overview: ISO Code B281E – 00 Client certificate missing - 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 Relevant functional DTCs present in TCU .DTC is set in case of Client certificate missing of TCU. Normal Operating Condition TCU properly flashed with valid firmware in normal condition and proper client certificate Probable Trouble Area Improper flashing of TCU certificate on the device (i.e., the client for cloud connections) is missing Faulty TCU Internal Component failure Healing Condition 1. Verify any other communication related DTCs present 2. Verify TCU DTCs and check for any related DTCs 3. Follow TCU trouble shooting guideline to clear the relevant functional DTCs 4. Clear DTC and reflash TCU 5. If problem persists after above steps (from 1 to 4) then replace TCU
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