Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1.0 Date: 30/11/2019 Author: ERC Page 508 of 610 Copyright by TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without our consent U0101-00: Loss of communication with Transmission Control Module- Bus Signal/ Message Failure Overview: ISO Code U0101 Customer Symptom Vehicle may or may not crank Fault Effects (On Vehicle) Vehicle may or may not crank Lamp Status (If Any) - Fault Detection Condition 1. TCM connector is not connected properly or disconnected from its location. 2. CAN wire from TCM connector side is disconnected. 3. TCM is not powered up. 4. CAN_H, CAN_L or/ and both lines of TCM are opened. Normal Operating Condition ECM ECU communicates properly with TCM ECU Probable Trouble Area 1. Disconnection of the TCM ECU connector 2. CAN_H and CAN_L lines at TCM connector end Healing Condition 1. To fix the TCM connector correctly 2. Fix the wiring harness issues from TCM side. 3. CAN_H, CAN_L or/ and both lines of TCM are connected properly to the TCM connector.
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