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: 34 of 34 xix. Read status for number of keys paired with IMMO from DID 443B as 0x02. xx. Power Latch - Ignition->OFF->ON transition. (Make sure is key is taken out). xxi. Enter into Diagnostic Session = Extended. (Send service request $10 03). xxii. Unlock the ECU for performing EOL operations i.e. for writing configuration parameters and flashing. Perform the following steps: i. Request Security Access Seed (Send service request $27 07). ii. Process the got 4 byte (XXXX) seed to Produce 4 byte security key. iii. Send the security key to unlock the ECU. (Send service request $27 08 YYYY). xxiii. Send service request Tester Present. (Send service request $3E 00) xxiv. Send service request $ 31 01 34 0A. xxv. Check Start routine response of the routine (71 01 34 0A XX YY). Where XX = RoutineStatusRecord, RoutineInformation and YY = Response additional data. xxvi. Read DID 4223 and verify value as 0x01 (Locked). xxvii. Give ECU reset (Diagnostics Request) ($11 01). Wait for 3 sec after reset. xxviii. Power Latch - Ignition->OFF->ON transition. (Make sure is key is taken out).
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