Vehicle Platform: Zest, Bolt, Tiago, Tigor, Osprey, Q501, X451, Q502 ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 3.8 Date: 17-10-2022 Author: BCM COC Page: 658 of 1202 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. START Connect Diagnostic tool and Run Input Test Routineand operate the switches as ment ioned in the input switch t est routine specification. Is DTC B223B - 12 logged by Routine? Disconnect vehicle ba ttery connection. (Please follow the safety guidelines) Check BCM and combi switch connectors fort erminal ba ckout Are connectors loose? 1.Remove BCM Connector. 2.Perform visual check of connectors for pins bentor damaged etc. Is connector faulty? 1.Put combi switch in OFF state. 2.Check continuity between BCM connector pin [C1-12] with battery [C3-2/ C3-1] Continuity Found? 1.Remove Combi Switch mating connector 2. Check continuity between BCM harness sideconnector pin [C1-12] and Rear Washer contact at combi switch [pin details TBD]. Perform thevisual check of connectors for pin bend or damaged etc. Is connector faulty? Check continuity at combi switchRear washer contact[ pin details TBD] with ground [ pin details TBD] Continuity found? BCM ECU Faulty STOP YES NO YES NO Reconnect connectors firmly Correct connector fault (Terminals Bend) YES NO Correct BCM Side wiringharness (Short to Battery) NO YES Correct connector fault (Terminal Bend) Correct connector fault at combi switch mating connector (Open Circuit) YES NO YES NO Replace BCM ECU 1. Connect combi switch mating connector 2. Put combi switch at Rear washer switch contact 3. check continuty between combi switch Rear washer switch contact[ pin details TBD] with ground[ pin details TBD] Continuity found? YES Combi switch fault . Replace combi switch NO B223B - 12: Rear Washer Switch - circuitshort to battery
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