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: 89 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. U0151-31: Lost Communication With Restraints Control Module: SRS Node Tout Faulty Overview: DTC Description (User Friendly) Lost Communication With Restraints Control Module: SRS 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. Fuel cut off will not happened during crash Fault Effects (On Vehicle) Fuel cut off will not happened during crash Lamp Status (If Any) CEL ON. CEL Turns Off as and when fault condition is not present / healed. Fault Detection Condition (Root cause) 1. RCM connector is not connected properly or disconnected from its location. 2. CAN wire from RCM connector side is disconnected. 3. RCM is not powered up. 4. CAN_H, CAN_L or/ and both lines of RCM are opened. 5. Any of the the selected frames from SRS node is timed out. Normal Operating Condition ECM ECU communicates properly with RCM ECU. Probable Trouble Area 1. Disconnection of the RCM ECU connector 2. CAN_H and CAN_L lines at RCM connector end. Healing Condition 1. To fix the RCM connector correctly 2. Fix the wiring harness issues from RCM side. 3. CAN_H, CAN_L or/ and both lines of RCM are connected properly to the RCM connector. Component Details: A restraint and fuel pump cutoff control system is disclosed wherein a restraint control module controls the restraint system such as an air bag deployment system and a fuel system power supply based upon data inputs from sensors positioned at various locations on the vehicle. When data received from the sensors indicates that a collision event has occurred and has reached the predetermined level of severity, power to the fuel system is cut off to prevent undesired pumping of fuel. If power is interrupted during a collision event, the fuel system will be cut off and remain cut off until reset by turning the ignition switch to off and then to run/start indicating a clean shutdown. 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 / RCM ECU Connector. 4. Check for any back out of pins at EMS ECU connector / RCM ECU Connector. 5. Check for any damage of pins at EMS ECU connector / RCM ECU Connector.
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