TML Infotainment DTC Troubleshooting guide for Nexon MCE Version: 0.2 Date: 28-Feb-20 Author: Pritam Bansod Page: 3 of 95 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to thi rd parties, wi thout the consent of author. Contents Change History .................................................................................................................................... 2 1. Introduction................................................................................................................................. 5 1.1. Objective .............................................................................................................................. 5 1.2. Intended audiences ................................................................................................................ 5 1.3. Infotainment system architecture............................................................................................. 5 1.4. Infotainment system variants................................................................................................... 6 1.5. Infotainment system component images ................................................................................... 6 1.5.1. Silver Box ....................................................................................................................... 6 1.5.2. Button Panel................................................................................................................... 7 1.5.3. Display........................................................................................................................... 7 2. DTC Troubleshoot procedure .......................................................................................................... 8 B1C01-13: AM FM Antenna Signal - circuit open ....................................................................................... 8 B1C33-2A: Hard Switch (Push Button/Rotary Knobs) - signal stuck in range ................................................ 12 B1C0E-13: Microphone Signal Input - circuit open................................................................................... 16 B1C0A-13: Left Rear Speaker Assembly Output Power / Left Rear Speaker Assembly Input Signal 1 - circuit open ....................................................................................................................................................... 20 B1C0B-13: Right Rear Speaker Assembly Output Power / Right Rear Speaker Assembly Input Signal 1 - circuit open ................................................................................................................................................ 24 B1C08-13: Left Front Speaker Assembly Output Power / Left Front Speaker Assembly Input Signal 1 - circuit open ................................................................................................................................................ 29 B1C09-13: Right Front Speaker Assembly Output Power / Right Front Speaker Assembly Input Signal 1 - circuit open ................................................................................................................................................ 33 B1C20-2A: Steering Wheel Control Input Signal - signal stuck in range ....................................................... 37 B1C20-13: Steering Wheel Control Input Signal - circuit open ................................................................... 41 B1C04-13: GPS Signal - circuit open....................................................................................................... 46 B1C4B-13: LVDS connector - circuit open............................................................................................... 51 B1C4D-08: Button Panel LIN - Bus Signal / Message Failures..................................................................... 55 CAN Bus Architecture ......................................................................................................................... 58 Preliminary Check .............................................................................................................................. 61 U0028-13: Vehicle Communication Bus A - open circuit ........................................................................... 62
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