Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 637 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 U0151-31: Loss of communication with Restrain Control Module- Bus Signal/ Message Failure Overview: DTC Code U0151-31 DTC Description as per ISO Standards Loss of communication with Restrain Control Module – Bus Signal/Message failure Customer Symptom Fuel cut off not happened during crash Fault Effects (On Vehicle) Fuel cut off not happened during crash Lamp Status (If Any) - Fault Detection Condition 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. 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.
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