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: 122 of 549 DTC’s confirmation:- After rectification, ensure the following points using TML diagnostic tool before handing over to customer. a) Clear the DTC’s & make sure no DTC’s are present for Airbag system a) Check whether any new DTC’s are getting qualified for repeated cranking. b) Ensure the Airbag Warning Lamp Indication is continuously ON in Instrument Cluster for 4 seconds after Ignition ON c) Ensure the Airbag Warning Lamp Indication goes OFF after 4 seconds from Ignition ON. Circuit Schematic Diagram:- Schematic shown below for illustration Battery>>>>>Fuse>>>>Relay>>>>>>>Sensor/Actuator>>>>>ECU IS DTC PRESENT? CLEAR DTC ’s . TURN OFF & ON IGNITION . CHECK FOR DTC’s (2 t o 3 times) IS DTC STILL PRESENT ? 1. REPLACE THE DRIVER FIS SENSOR. 2. TURN OFF & ON THE IGN ITION. 3. CLEAR DTC’s 4. CHECK WHETHER THE DTC IS STILL PRESENT. IS DTC PRESENT? REPLACE THE ECU WITH A NEW ONE YES NO NO YES YES NO TURN OFF & ON IGNITION . CL EAR DTC & CHECK FOR DTC’s IS DTC PRESENT? NO STOP CONNECT THE ECU , DRIVER FIS SENSOR & W/H MODULE IN THE VEHICLE YES START B 1 0 0 E 6 4 :: Front al Impact Driver Sensor signal plausibility failure . TURN ON IGNITION. CONNECT THE DIAGNOSTIC TOOL AND CHECK FOR DTC’s
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