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: 1120 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. U1012 - 11: Wake up on Entry Signal - 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 U1012 – 11 logged by Routine? Disconnect vehicle battery connection. (Please follow the safety guidelines) Check connection between BCM and Other Doors switch Are connectors loose? Correct connector fault (Terminals Bend) 1.Remove BCM Connector. 2.Perform visual check of connectors for pins bent or damaged Is connector faulty? STOP 1. Close all doors 2. Check continuity between BCM connector pin [C4-9] Harness side) with Ground [C1-34/C1-47] Continuity Found? 1. Remove Wake up on Entry Signal 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) NO YES YES NO YES YES YES NO NO NO Check if Wake up on Entry Signal input [wiring harness side] [C4-9] are shorted to ground. Check the switch inputs one at a time. Correct Wakeup on Entry Signal side wiring harness (Short to Ground) 1. Close and Open the Bonnet 2. Check if Wake up on Entry Signal is operating? Continuity Found? Reconnect all connectors firmly YES Correct BCM side wiring harness ( Short to Ground) Continuity Found? YES NO NO Connect battery and other connectors of BCM ECU, if disconnected. BCM ECU Faulty ReplaceBCM ECU
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