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 third parties, without 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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