TIAGO TIGOR BSVI - SERVICE MANUAL - DTC 24-12-2021

Prepared by: Airbag COC Review Approved by: Sanjeev VM Page: 510 of 648 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. SRS / Airbag ECU AB12 DTC Troubleshooting Guide Version: 2.0 Date: 21-June-2021 U0415-81:- Invalid Data Received From Anti-Lock Brake System (ABS) Control Module - invalid serial data received ISO Code U0415-81 Customer Symptom DTC U0415-81 is qualified, ABS ECU message transmission not proper Fault Effects (On Vehicle) SBR Functionality not guaranteed. Lamp Status (If Any) No Effect. Fault Detection Condition DTC U0415-81 is qualified, ABS ECU message transmission not proper Normal Operating Condition DTC U0415-81 should not be present. Probable Trouble Area Related wiring Harness, connector or terminals Invalid Data Received From Anti-Lock Brake System (ABS) Control Module Airbag Wiring Harness Airbag ECU Healing Condition Check source ECU for DTC's and correct signal values Check the sender ECU for abnormalities. Component Details:- (Refer Annexure 2 for Mounting Location of AB12 Airbag ECU) Airbag ECU : - It is fitted in the floor of central console in the car. The Airbag Electronic Control Unit (ECU) controls the deployment system to allow an appropriate igniting of the Airbags and belt pre-tensioners to restrain the driver and passengers Preliminary Checks:- 1. Check Battery Voltage (12 V & above) 2. Check for any faults in Airbag Warning Lamp indication in Instrument Cluster. 3. Ensure the proper locking of Airbag ECU wiring harness connectors in the vehicle by the locking sound. Troubleshooting:-