PEPS Part ReplacementProcedure Title: PEPS System Part Replacement Procedure Spec Num 2921 XX XXX A XXXXTBD Date: 28-Jul-18 Version: 1.5 Page: 10 of 25 Prepared: Sandip Checked: Santosh B Approved: Dinesh DG Thisspeci fication is the exclusive property of Tata MotorsLimited. Wi thout their consent i t may not be reproduced or given to thi rd parties. The above speci ficationsare subject to change and therefore suppl iersare requested to refer the latest one. CONTROLLED COPY FOR RESTRICTED CIRCULATION © TATA MOTORS LTD. 13)Enter into diagnostic session extended and unlock security to PEPS ECU (This is an essential step, without unlocking the security access further steps will not be executed). 14)Write the VIN and VC. NOTES: Always provide ECU reset before reading VC number 15)Generate AES_SK code (using tester tool) and write AES_SK code into PEPS. 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 beforewriting, 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) 16)Write the same AES_SK code (using tester tool) in BCMas well. Before writing check whether AES_SK is locked for writing or not, send service request $22 42 23 and read the response. If response is ‘01’ i.e. 62 44 1C 01 then unlocking of AES_SK is required before writing, else if response is ‘00’ i.e. 62 44 1C 00 then start writing AES_SK key immediately. 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.
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