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

Prepared by: Airbag COC Review Approved by: Sanjeev VM Page: 357 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 B100E-86:- Frontal Impact Left sensor signal invalid Overview:- ISO Code B100E86 Customer Symptom SRS Warning Lamp continuously ON in Instrument Cluster. Fault Effects (On Vehicle) Front crash detection performance is degraded & Front Left angular crash detection is not guaranteed. Lamp Status (If Any) SRS Warning Lamp continuously ON in Instrument Cluster. Fault Detection Condition This fault gets logged if an invalid signal is obtained from Frontal Impact Left Sensor. Normal Operating Condition Proper signal should be obtained from Frontal Impact Left Sensor. Probable Trouble Area Related wiring Harness, connector or terminals Frontal Impact Left Sensor Module. Airbag Wiring Harness Airbag ECU Healing Condition Airbag ECU & Wiring Harness should be checked for any shorts, bents or damage & it needs to be rectified. Component Details:- (Refer Annexure 2 for Mounting Location of AB12 Airbag ECU) Frontal Impact Sensor:- It is usually located in the radiator support vertical member. Front impact sensors collect the data necessary to make decisions about Airbag deployment 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. 4. Check whether the Frontal Impact Left sensor is connected properly to the wiring harness. Ensure the proper locking of the Frontal Impact Left sensor to the wiring harness connector. Troubleshooting :-