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: 518 of 549 B0075-2B:- Second Row Right Seatbelt Pre tensioner Deployment Control signal cross coupled Overview:- ISO Code B00752B Customer Symptom SRS Warning Lamp continuously ON in Instrument Cluster. Fault Effects (On Vehicle) Second Row Right Seatbelt Pre tensioner deployment not guaranteed, if a crash happens Lamp Status (If Any) SRS Warning Lamp continuously ON in Instrument Cluster. Fault Detection Condition This fault gets logged if the signal of Second Row Right Seatbelt Pre tensioner gets cross coupled with any other Firing loop terminal during Power ON. Normal Operating Condition No cross coupling should be present. Probable Trouble Area Related wiring Harness, connector or terminals Second Row Right Seatbelt Pre tensioner Module Airbag Wiring Harness Airbag ECU Healing Condition Cross coupling should be removed & Ignition should be turned OFF & ON. Component Details:- Second Row Right Seatbelt Pre tensioner Module: - It is located at the rear driver door wheel arch inner panel. 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. Trouble Shooting:-
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