Copyright © TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout the consent of author. SRS / Airbag ECU – DTC Troubleshooting Guide Vers ion: 14.0 Da te: 14-February-2017 Prepared by:Airbag COC Review & Approved by:Sanjeev VM Page: 151 of 549 B100F-12:- Frontal Impact Passenger Sensor circuit short to battery Overview:- ISO Code B100F12 Customer Symptom SRS Warning Lamp continuously ON in Instrument Cluster. Fault Effects (On Vehicle) Front Crash detection performance is degraded & Front Passenger 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 any of the high side (B8) or low side pin (B7) of Frontal Impact Passenger sensor gets shorted with battery line. Normal Operating Condition No short with battery should be present. Probable Trouble Area Related wiring Harness, connector or terminals Frontal Impact Passenger sensor Airbag Wiring Harness Airbag ECU Healing Condition Remove the short to battery. Component Details:- 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. Trouble Shooting:- 3. Ensure the proper locking of Airbag ECU wiring harness connectors in the vehicle by the locking sound.
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