Prepared by: Airbag COC Review Approved by: Sanjeev VM Page: 247 of 668 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. SRS / Airbag ECU AB12 DTC Troubleshooting Guide Version: 3.0 Date: 05-June-2023 TURN ON IGNITION. CONNECT THE DIAGNOSTIC TOOL AND CHECK FOR DTC’s IS DTC PRESENT? CLEAR DTC . TURN OFF & ON IGNITION & CHECK FOR D TC’s ) at least 2 to 3 times ( IS DTC STILL PRESENT ? TURN OFF IGNTION. REPLACE THE AIRBAG WIRING HARNESS WITH A NEW ONE . YES NO NO YES NO TURN OFF & ON IGNITION . CLEAR DTC’s & CHECK FOR DTC’s IS DTC PRESENT? NO STOP RE - CONNECT THE AIRBAG ECU, AIRBAG W IRING H ARNESS IN THE VEHICLE YES TURN ON IGNIT ION. CLEAR DTC’s & CHECK FOR DTC’s. 1. TURN OFF IGNITION. 2. REPLACE THE AIRBAG ECU WITH A NEW ECU IS DTC STILL PRESENT? YES START B0004-2B: Driver Knee Airbag Deployment Control signal cross coupled
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