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: 80 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. U0138-31: Lost Communication With All Terrain Control Module: Drive Control Switch / DCS Node Tout Faulty Overview: DTC Description (User Friendly) Lost Communication With All Terrain Control Module: Drive Control Switch / DCS 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 ON. Fault Effects (On Vehicle) ECU will go into the default mode. Lamp Status (If Any) CEL ON. CEL Turns Off as and when fault condition is not present / healed. Fault Detection Condition (Root cause) Any of the the selected frames from DCS node is timed out. Normal Operating Condition ECM ECU communicates properly. Probable Trouble Area Connection between EMS ECU and DCS Connector Healing Condition 1.To fix the dcs connector correctly . Component Details: DCS controls the working of Drive control mode switch. 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 / DCS Connector. 4. Check for any back out of pins at EMS ECU connector / DCS Connector. 5. Check for any damage of pins at EMS ECU connector / DCS Connector. Trouble Shooting:
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