TIAGO TIGOR BSVI - SERVICE MANUAL - DTC 24-12-2021

TATA BSVI Gasoline Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 1.2 Date: 18-12-2019 Prepared By: Sunita Mandlik Checked By: Yeshwant Jadhav Approved By: Satish Kumar Document Part No: 2921 02 xxx xxxx Page: 1079 of 1498 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. U0155-31: Lost communication with Instrument Panel Cluster Module-Message Time Out Failure Overview: ISO Code U0155-31 Customer Symptom Vehicle will not function as per design intent Fault Effects (On Vehicle) Vehicle will not function as per design intent Lamp Status (If Any) None. Fault Detection Condition IPC connector was not connected properly or disconnected from its location. Normal Operating Condition ECM ECU and IPC ECU communicate properly with each other. Probable Trouble Area Disconnection of the IPC connector Healing Condition To fix the IPC connector correctly and Fix the wiring harness issues from IPC side. Preliminary Checks: 1. Check ECM is communicating with TML diagnostic DTC or not. 2. If not, check for short conditions between CAN_H-CAN_L, CAN_H-GND, CAN_L-GND, CAN_H-Vbatt and CAN_L-GND at ECM vehicle side wiring harness (pin details are provided with schematic in the document). There should not be any short Circuit conditions. 3. There should be continuity between vehicle side wiring harness with following pins. IPC CAN_H (pin. 6) to ECM CAN_H(C1, 32) and IPC CAN_L (pin. 5) to ECM CAN_L(C1, 44) Continuity should be there. 4. Read IVN DTCs in ECM after IGN ON condition with TML diagnostic tool.