Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 641 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent U0155-00: Lost communication with Instrument Panel Cluster Module- Bus signal/ Message Failure Overview: DTC Code U0155-00 DTC Description as Per ISO Standards Lost Communication with Instrument panel Cluster Module – Bus Signal / Message failure Customer Symptom RPM indication will be disabled Fault Effects (On Vehicle) Reduced torque Mode will be activated. Reduced Vehicle performance. Drive modes will be disabled. ECU will go into the default mode Lamp Status (If Any) CE Lamp ON Fault Detection Condition 1. IPC connector is not connected properly or disconnected from its location. 2. CAN wire from IPC connector side Is disconnected 3. IPC is not powered up. 4. CAN_H, CAN_L or/ and both lines of IPC are opened Normal Operating Condition ECM ECU communicates properly with IPCECU. Probable Trouble Area 1. Disconnection of the IPC connector 2. CAN_H and CAN_L lines at IPC connector end. Healing Condition 1. To fix the IPC connector correctly and Fix the wiring harness issues from IPC side 2. CAN_H, CAN_L or/ and both lines of IPC are connected properly to the IPC connector
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