Nexon_MCE2_7inch_Digital Instrument Cluster_DTC Trouble Shooting Data Version: 1.0 Date: 09-May-2023 Author: Suraj Patil / Rajesh Patil Page: 95 of 167 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. U0100 - 08:- Lost communication with ECM- Message Timeout Failure Overview: - ISO Code U0100-08 Customer Symptom CE Lamp ON, MIL Lamp ON Fault Effects (On Vehicle) Engine speed, Coolant gauge, Fuel computer, OAT info cannot be displayed on IPC. Lamp Status (If Any) CE Lamp ON, MIL Lamp ON Fault Detection Condition 1.ECM connector is not connected properly or disconnected from its location 2. CAN Stub wire from ECM connector side is disconnected. 3. ECM ECU is not powered up. Normal Operating Condition ECM ECU communicates properly TML diagnostic Tool. Probable Trouble Area Disconnection of the ECM connector Healing Condition To fix the ECM connector correctly and Fix the wiring harness issues from ECM side. Trouble Shooting: - Start Read IVN DTCs in IPC If MTO logged against ECM in current state? No (In history) Check continuity between ECM CAN_H to IPC CAN_H(pin no.6 ) and ECM CAN_L to IPC CAN_L(pin no. 5) in vehicle wiring side connector. Is continuity there? Repair the wiring harness Clear DTC Stop Check Ignition, Battery and Ground of ECM is properly connected or not. Also check fuse blown(Ignition-10A, Battery10A,15A,20A) Do necessary repair in the harness Yes Yes No U0100-08 Loss of communication with ECM/PCM
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