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. Vehicle Platform: F4 (Bolt) / F5 ( Zest) / TIAGO / TIGOR / EAGLE/OSPREY/Q5/X451 ECU Name: Hella Body Control Module (BCM) ECU Replacement Procedure Version: 3.5 Date: 27-Jan-2020 Author: BCM CoC Page: 14 of 34 AES_SK Unlocking Procedure BCM: i. Send service request $ 31 01 34 0B ii. Check Start routine response of the routine 71 01 34 0B XX YY XX = RoutineStatusRecord, RoutineInformation, YY = Response additional data. iii. If (XX == 01 && YY==01) { Successful }// END if (XX == 01 && YY==01) Else { Unsuccessful }// END else if (XX == 01 && YY==01) 17.2. AES_SK Unlocking Procedure PEPS: Write same AES_SK code (using tester tool) in PEPS as well. Before writing check whether AES_SK is locked for writing or not, send service request $22 44 1C and read the response. If response is ‘00’ i.e. 62 44 1C 00 then unlocking of AES_SK is required before writing, else if response is ‘01’ i.e. 62 44 1C 01 then start writing AES_SK key immediately. AES_SK Unlocking Procedure PEPS: i. Send service request $ 31 01 4F 0B ii. Check Start routine response of the routine 71 01 4F 0B XX YY XX = RoutineStatusRecord, RoutineInformation, YY = Response additional data. iii. If (XX == 01 && YY==01) { Successful }// END if (XX == 01 && YY==01) Else { Unsuccessful }// END else if (XX == 01 && YY==01)
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