Q501 4 Cylinder MT Application DTC Troubleshooting Data Version: 0.1 Date: 21-Sep-2018 Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta Checked By: Yogesh Jadhav Approved By: Satish Kumar P Page: 83 of 1052 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. U0140-31: Lost Communication With Body Control Module: BCM Node Tout Faulty Overview: DTC Description (User Friendly) Lost Communication With Body Control Module: BCM Node Tout Faulty ECU Pin Number K013 – CAN_H K014 – CAN_L A075 – Ignition K001, K003, K005 – Supply voltage battery K002, K004, K006 - Ground voltage battery Customer Symptom MIL OFF, CEL OFF. Reverse indication will not work Fault Effects (On Vehicle) BCM will not work Lamp Status (If Any) - Fault Detection Condition (Root cause) 1. BCM connector is not connected properly or disconnected from its location. 2. CAN wire from BCM connector side is disconnected. 3. BCM is not powered up. 4. CAN_H, CAN_L or/ and both lines of BCM are opened. 5. Any of the the selected frames from BCM node is timed out. Normal Operating Condition ECM ECU communicates properly with BCM ECU. Probable Trouble Area 1. Disconnection of the BCM ECU connector 2. CAN_H and CAN_L lines at BCM connector end Healing Condition 1. To fix the BCM connector correctly 2. Fix the wiring harness issues from BCM side. 3. CAN_H, CAN_L or/ and both lines of BCM are connected properly to the BCM connector. Preliminary Checks: 1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above Table. If yes, go ahead with next steps. If not, check for other DTC’s presence. 2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with respect to earlier issue closure. 3. Check for Damage in EMS ECU connector / BCM ECU Connector. 4. Check for any back out of pins at EMS ECU connector / BCM ECU Connector. 5. Check for any damage of pins at EMS ECU connector / BCM ECU Connector. Trouble Shooting:
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