Vehicle Platform: Nexon-EV ,Nexon-MCE ECU Name: Telematics Control Unit (TCU) DTC Troubleshooting Data Version: 1.4 Date: 16-09-2020 Author: TCM COC Page: 32 of 121 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. U1611 - 57:- Master Electronic Control Module Communication from Backup Electronic Control Module - missing message Overview: ISO Code U1611 – 57 Master Electronic Control Module Communication From Backup Electronic Control Module - missing message Customer Symptom All features related to telematics ECU 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 error in master electronic control module communication from backup electronic control module Normal Operating Condition TCU communicates Properly with diagnostic tool and there is no signal/ message failure to the Partner ECU’s Probable Trouble Area Faulty TCU TCU internal circuit error 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. Check for internal component failure 6. If problem persists after above steps (from 1 to5) then replace TCU
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