Vehicle Platform: OSPREY ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 1.4 Date: 15 May 2018 Author: Body CoC Page: 772 of 855 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. U1303 – 88 : LIN bus B bus OFF Start Connect the Diagnostic Tool and check for DTCs Is DTC U1303 –88 present? STOP Check DTC present is Current or history Yes History? Yes Is DTC B1303 – 88 present? C Yes C Any fault observed ? Correct the fault Check BCM side connector. Disconnect vehicle battery connection. (Please follow safety guidelines) Check whether there is any fault on LIN transceiver. 1. Clear the DTC from memory. 2. Turn the IGN to OFF. 3. Start the IGN. 4. Check for DTCs. No Is loosely connected ? Connect firmly Check for harness wire short Is harness wire short ? BCM ECU faulty Replace BCM ECU No Yes No Yes No Yes No No Correct wiring harness
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