Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 831 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 U0101-62: Lost Communication With TCM - Signal Compare Failure Overview: Code Cause Effect on Vehicle Fault Code: U0101-62 1. Disconnection of the TCM ECU connector 2. Crank enable request switch open circuit 3. ECU connector pin back out 4. ECU terminal pin damage or bend 1. No lamp reaction Lamp status: Check Engine Lamp off Malfunction Indicator Lamp off Checkpoint: Check battery voltage (nominal 11.5V ~ 14V) Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check whether the crank enable sensor connector is connected properly. - Step 2 Check whether the ECU connector is connected properly - Step 3 Check the continuity between Crank enable request pin and ECU pin B58. - Step 4 Check the ECU terminal pin for any damage or bend. Check the ECU connector for any pin backout - Step 5 Check for wiring harness issues from both TCM and crank enable pin Step 6 CAN_H, CAN_L or/ and both lines of TCM are connected properly to the TCM connector Step 7 If problem persists, replace the crank enable request switch - Verification condition:
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