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: 1050 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. B161A - 11: Internal Unlock Switch - Circui t Short to Ground START Connect Diagnostic tool and Run Input Test Routine and operate the switches as mentioned in the input switch test routine specification . Is DTC B161A – 11 logged by Routine? Disconnect veh icle battery connection. (Please follow the safety guidelines) Check connection between BCMand Master Actuator lock signal pin Are connectors loose? Correct connector fault (Terminals Bend) 1.RemoveBCM Connector. 2.Perform visual check of connectors for pins bent or damaged Is connector faulty? STOP 1. Unlock the veh icle 2. Check continuity between BCM connector p in [C4- 16] Harness side) with Ground [C1-34/C1-47] Continu ity Found? 1. Remove Internal Un lock Switch 2. Perform visual check of connectors for pin bend or damaged Reconnect connectors f irmly Internal Un lock Switch Faulty? Correct Connector fault (Terminal Bend) NO YES YES NO YES YES YES NO NO NO Check if Internal Unlock Switch input[wiring harness side] is shorted to ground. Correct Internal Un lock Switch side wiring harness (Short to Ground) 1. Unlock and then Lock the vehicle using RKE or internal knob Check if Locking action is successful? Reconnect all connectors f irmly YES Correct BCMside wiring harness ( Short to Ground) Continu ity Found? YES NO NO Connect battery and other connectors of BCM ECU, if disconnected. BCMECU Faulty Rep laceBCM ECU