Vehicle Platform: All ECU Name: Telematics Control Unit (TCU) DTC Troubleshooting Data Version: 1.12 Date: 02-06-2022 Author: TCM COC Page: 70 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. B2809 - 57:- Error communicating with board controller (Base band) - invalid / incomplete software component Overview: ISO Code B2809 – 57 Error communicating with board controller (Base band) - invalid / incomplete software component 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 error communicating with board controller (Base band) within TCU. Normal Operating Condition Inside TCU doesn’t have error in communicating with board controller (Base band) in normal condition. Probable Trouble Area Internal hardware errors or faulty TCU Faulty TCU The communication between the application processor and the board controller is problematic. 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. Clear DTC and reflash TCU 6. Replace CPU board 7. If problem persists after above steps (from 1 to 6) then replace TCU
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