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: 510 of 549 B0075-1A:- Second Row Right Seatbelt Pre tensioner Deployment Control circuit resistance below threshold Overview:- ISO Code B00751A 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 circuit resistance of Second Row Right Seatbelt Pre tensioner is below the threshold value (1.1 Ohm) after 4 seconds of cranking. Normal Operating Condition The minimum threshold for Second Row Right Seatbelt Pre tensioner Control circuit is 1.1 Ohm. Probable Trouble Area Related wiring Harness, connector or terminals Second Row Right Seatbelt Pre tensioner Module Airbag ECU Airbag Wiring Harness Healing Condition Minimum threshold resistance for Second Row Right Seatbelt Pre tensioner should be 1.1 Ohm. 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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