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. Restraints Control Module AB12 (SRS / Airbag) ECU Replacement Procedure Version: 4.0 Date: 15-July-2021 Author: Airbag CoC, ERC Page: 6 of 14 14. ECU Customer mode ($22 40 13) Note: If there is any mismatch in ECU data and Server Data, display a specific warning and abort the Replacement procedure. While comparing any part numbers, only 12 digits to be compared. Revision (NR,A,B….etc.) of the Part Number shall not be checked/compared. Steps for SRS (Airbag) ECU cannibalizing (try out) during Service: Please refer Annexure 1 of SRS ECU Serviceability document version 2 (Serviceability_SRS_ECU_v 2.doc). Cannibalization meaning: - to remove a part from a vehicle to repair or make a similar unit. 1. Connect the Service tool to vehicle OBD connector. 2. Turn ON Ignition -Wait for 7sec, Clear the DTC’s and Check for DTC’s in both the Airbag ECU’s. 3. Read the ECU Assembly number ($22 72 34) and Hardware Part Number ($22 F187) using service tool and compare it with Look up table/PLM server (or with old ECU) as per defined VC. It should match with the existing ECU data. 4. Read ECU Parameterization number using service tool ($22 72 44) and compare with Look up table/PLM server (or with old ECU) as per defined VC. It should match with the existing ECU data. 5. If both the Assembly number & Parameterization number matches then only ECU replacement will be allowed, otherwise not. 6. Vehicle should not be allowed outside the Service station with the Cannibalized ECU from another vehicle.
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