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PEPS Part ReplacementProcedure
Title: PEPS System Part Replacement Procedure
Spec Num 2921 XX XXX A XXXXTBD
Date:
28-Jul-18
Version:
1.5
Page: 4 of 25
Prepared:
Sandip
Checked:
Santosh B
Approved:
Dinesh DG
Thisspecification isthe exclusive property of Tata MotorsLimited. Withouttheir consent it may not be reproduced or given to third
parties
.
The above specificationsare subject to change and therefore suppliersare requested to refer the latest one.
CONTROLLED COPY FOR RESTRICTED CIRCULATION
© TATA MOTORS LTD.
Step-21 - New step added to write same
AES_SK key in EMS
Step-23 - New step added to check and
confirm the status smart key/ UID learned
with PEPS
Step-24 - New step added to store the
learned smart key/ UID ID on server
Step-27 - AES_SK key locking procedure
PEPS added
Step-28 - AES_SK key locking procedure
BCM added
Step-29 - New step added to lock
AES_SK key in EMS ECU
Read status of PEPS Lifecycle with UID
($22 44 42), step removed.
Read status of PEPS Lifecycle with EMS
($22 44 43), step removed.
1.2
Draft1
Read status of PEPS Lifecycle with UID
($22 44 42), step retained back.
1.2
6
1.3
Terminologies – Made in alphabetical
order.
1.3
7
2
NOTE modified
9
2
After step-14, NOTE added "Always
provide ECU reset before reading VC
number"
12
2
After step-31, NOTE added "Always
provide ECU reset before reading VC
number"
12
2
Step-32 - Modified for response validation
10
2
Step-18 – Strikeout as not required
1.4
2.2
ECU replacement procedure - wearable is
added in addition to smart key
2.3
Heading modified - Wearable is added in
addition to smart key
NOTE added - same procedure for
wearable and smart key
Statements modified - wearable is added
in addition to smart key
Point-1 added - PEPS ECU shall be in
awake mode by turning ONposition or
hazard lamps
Point-2 added - If fresh ECU is present,
Free IGN ON can be used
Heading modified - Wearable is added in
addition to smart key
2.4
NOTE added - same procedure for
wearable and smart key
Statements modified - wearable is added