TML Gen3 IVI DTC Troubleshooting guide Version: 0.4 Draft Date: 04-Aug-23 Author: Hemant Mitra Page: 515 of 584 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. U131B - 08:- Lost Communication with Drive Control Switch (DCS) – Bus signals/ message failure Overview: Code U131B-08 Customer Symptom Drive mode indication will not be displayed Fault Effects (On Vehicle) Drive mode indication will not be displayed Lamp Status (If Any) Drive mode indication will not be displayed Fault Detection Condition 1. DCS connector is not connected properly or disconnected from its location. 2. CAN wire from DCS connector side are disconnected 3. DCS IGN & Battery fuse blown. 4. CAN_H, CAN_L or/ and both lines of DCS are open circuit Normal Operating Condition IPC ECU communicates properly with DCS Probable Trouble Area 1. DCS connector / DCS fuse. 2. CAN lines of DCS, Healing Condition 1. DCS ECU is connected and no wiring harness issues from DCS side 2. CAN_H, CAN_L or/ and both lines of DCS are connected properly
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