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: 9 of 14 Annexure 1 Programming Sequence: 1. Pre - Programming sequence: Reference “RS_A0198_002_34” of “TML ECU Reprogramming Requirement Specification v2.7.pdf” Step Description Remarks 1. Read target ECU DTCs Check for fault codes i.e. Read DTCs. (send service request 19 02 09 (702 - Physical request)) 2. Clear DTC from Airbag ECU $14 FF FF FF 3. Read target ECU DTCs Test tool to store any DTC’s that cannot be cleared Check for fault codes i.e. Read DTCs. (send service request 19 02 09 (702 - Physical request) 4. Test Tool to calculate re-programming file(s) checksum and compare with File checksum included in file(s) to be downloaded. 5. Transition all ECUs to Extended session $ 10 03 (7DF -Parallel request) 6. TesterPresent keep all ECUs in Extended session $ 3E 00 (7DF -Parallel request) 7. Reprogramming Preconditions Routine 31 01 20 0D (702 - Physical request) 71 01 20 0D 01 00 (OK) / 01 (NOK)->(70A - Physical response) preconditions (Vehicle Speed = 0 kmph; Battery Voltage 9-16V)
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