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: 383 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. B2218 -11: Headlamp Auto On Enable Switch - circuit 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 B2218-11 logged by Routine? Disconnect vehicle battery connection. (Please follow the safety guidelines) Check BCM and combi switch connectors for terminal backout Are connectors loose? Correct connector fault (Terminals Bend) 1.Remove BCM Connector. 2.Perform visual check of connectors for pins bent or damaged etc. Is connector faulty? STOP 1. Put combi switch in Auto state. 2. Check continuity between BCM connector pin [C4-11] Harness side) with Ground [C1-34/C1-47] Continuity Found? 1. Remove Combi switch mating connector 2. Perform visual check of connectors for pin bend or damaged etc. Reconnect connectors firmly Con nector Faulty? Correct Connector fault (Terminal Bend) BCM ECU Faluty ReplaceBCM ECU NO YES YES NO YES YES YES NO NO NO Check if Combi switch Auto beam input [wiring harness side] is shorted to ground Correct combi switch sidewiring harness (Short to Ground) Check if combi switch is faulty / two terminals of Auto position are shorted to each other or shorted to ground pin terminal Switch Faulty? Replace combi switch 1.Remove all BCM connectors 2.Take out Auto position wire [C4-11] from connector 3.Reconnect all connectors including battery 4.Check if Low beam And Position lamp is ON? Low Beam & position lamp ON? Reconnect all connectors firmly YES NO YES NO Correct BCM side wiring harness ( Short to Ground) Continuity Found? YES NO
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