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: 458 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. BCM ECU Faulty Replace BCM ECU Is connector faulty? Correct connector fault (Terminals Bend) YES 1. Take out Door Second StageUnLock/ Door UnLock control others Relay. 2. Check if bulb is blown Continuity found? Correct BCM side wiring harness (Short To Battery) YES NO Check continuity between BCMconnector pin [C1-42] and BCM battery[ C3-2/ C3-1] 1. Remove Door Second StageUnLock/ Door UnLock control others Relay mating connector 2. Perform the visual check of connectors for pin bend or damaged etc. Is connector faulty? Correct connector fault (Terminals Bend) YES NO Bulb blown? Replace the relay (Open Circuit) 1.Remove all BCMconnector 2.Take out Door Second StageUnLock/ Door UnLock control others Relay output wire [C1-42] from connector 3.Reconnect all connectors including battery 4.Check if Door Second StageUnLock/ Door UnLock control others Relay is ON? Door Second StageUnLock/ Door UnLock control others Relay is ON? Reconnect all connectors firmly YES NO YES NO NO A B B160A – 12: Door Second StageUnLock/ Door UnLock control others Relay – Short To Battery / Open