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: 60 of 549 B0070-1B:- Driver Seatbelt Pretensioner Deployment Control circuit resistance above threshold Overview:- ISO Code B00701B Customer Symptom SRS Warning Lamp continuously ON in Instrument Cluster. Fault Effects (On Vehicle) Driver Seatbelt Pretensioner 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 Driver Seatbelt Pretensioner is above the threshold value (5.5 Ohm) after 4 seconds of cranking. Normal Operating Condition The maximum threshold for Driver Seatbelt Pretensioner Deployment Control circuit is 5.5 Ohm. Probable Trouble Area Related wiring Harness, connector or terminals Driver Seatbelt Pretensioner Module Airbag ECU Airbag Wiring Harness Healing Condition Maximum threshold resistance for Driver Seatbelt Pretensioner should be less than 5.5 Ohm. Component Details:- Seatbelt Pre-tensioners:- Seatbelt Pre-tensioners retracts forcefully to adjust occupants into a safer seating position when the airbags deploy. It is usually located in the B-pillar and is connected with the seat belt buckle assembly. 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:-
RkJQdWJsaXNoZXIy MTIwNTUz