TIAGO TIGOR BSVI - SERVICE MANUAL - DTC 24-12-2021

Vehicle Platform: Zest, Bolt, Tiago, Tigor, Osprey, Q501, X451, Q502 ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 3.1 Date: 30-11-2019 Author: BCM COC Page: 985 of 1106 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. Trouble Shooting: START Connect Diagnostic tool and check for DTCs Is DTC B1639-06 present? STOP NO Check DTC present is Permanent or Historic Is History? 1. Clear the DTC from memory 2. Turn the IGN to OFF 3. Start the IGN Is DTC B1639-06 present? YES NO YES YES NO Disconnect vehicle battery connection. (Please follow the safety guidelines) 1. Check CAN connection between BCMand EMS 2. Check pairing status of BCM and EMS Are connectors loose? Reconnect connectors firmly YES 1. Remove BCM side wiring harness Connector. 2. Perform visual check of connectors for pins bent or damaged. 3. No communication between BCM and ECM. Is connector faulty? Correct connector fault (Terminals Bend) YES NO NO A B B1639 – 06 : Module ECM/PCM & BCM handshake failed – Algorithm Based Failures Is DTC B1653-06 present? NO Check the ASK-Key code from BCM and ECM Is BCMASK-Key Code matched? YES YES Keep the ASK-key code as per ECM in BCM NO