Robert Bosch Pty Ltd VIMA01 Benutzerhandbuch

PROTOCOL SPECIFICATION

F005VP0801

ROBERT BOSCH

(AUSTRALIA) PTY. LTD.

A.B.N. 48 004 315 628

SMARTRA III IMMOBILISER

Page 15 of 49

Issue Number:

1.0

Dev No.

3881

Valid from:

14/2/06

Print Date:

28 March, 2007

DEV04205.9/I-1

4.4 4Bh - Transponder IDE (Pre ID Matching)

4.4.1 0x4B – (Existing) Pre Secret Encryption Key – kept for backwards compatibility

CU Request :-

49 02 4B 4D

SMARTRA2 Response:-

69 05 IDE1 IDE2 IDE3 IDE4 Checksum

IDE1..IDE4

bit

Identifier.

4.4.2 0x4B – New – Secret Encryption Key – with Encryption check.

CU Request :-

49 08 4B RN1

RN2

RN3

RN4

RN5

RN6 CS

RN1..RN6 :- Random Number bytes (00-FF)

Note :-

RN1..6 can be based on the 4 byte random number from the Transponder Authentication

command (refer to “4.5 Transponder Authentication”). This will avoid extra EMS processing to generate
a random number.

SMARTRA3 Response:-

69 0D Return IDE1 IDE2 IDE3 IDE4 ERN1

ERN2

ERN3

ERN4

ERN5

ERN6

Smartra

State

Return :-

0x00 = transponder communications OK

0x01 = transponder missing or incorrect communications

0x02 = Antenna coil Open/Short Detection

IDE1..IDE4

bit

Identifier.

ERN1 .. ERN6 :- Encrypted Random Number using Secret Encryption Key (SEK)
Smartra State :-

0x01 = Learnt / Taught

0x02 = Virgin

0x03

Neutral

Note : - SMARTRA will take up to 110ms to start sending IDE response to the CU.

- When Transponder is missing the Return value will be 0x01 and IDE1 to IDE4 = (0x00 0x00
0x00 0x00).
- When Smartra3 receives the IDE request with the Random Number and it is in:

• [virgin] or [neutral] state the ERN1..6 shall be the encrypted random number using a

default key.

• [learnt] state the ERN1..6 shall be the encrypted random number using the Secret

Encryption Key (SEK).

- Default encryption key will be described in Encryption Software Integration Document.