This instruction focus on the function of Benz DTS Monaco seed key security,explain and give you example on how to use seed-key security.
What is Seed-key Security?
Seed-key security is used by some communication protocols to gain access to ECU functions, which are therefore protected from unauthorised access.
The basic idea is that the ECU provides a seed – a short string of byte values – and the tool is required to transform that seed into a key using a secret algorithm.
The ECU applies the same algorithm internally, and compares the key value given by the tool to its own value. If the two agree, the tool is assumed to “know” the secret algorithm, and access is authorised.
You need SEED KEY in case if your ECU can’t be UNLOCK for variant coding with “Steuergerat entriegeln (DJ_Zugriffsberechtigung)” And when you try to change variant codings you will have error.
ECUs with seed key
ECUs with seed key protection (these are not all ECUs)
MEMO
MEMOAMG
MED 177
MED1775
CR61
CR60NFZ
CR41
CR41R
CR43
CR43_T1N
SIM271DE20
CRD3S2
CRD3NPZ
IC_204 for activation of AMG menu (ask user gurgel)
UDS/Manual Method – Seed key insertion (fast method)
Instruction for CBF file (Vediamo):
1.Start Vediamo and connect to ECU thru CBF file. For example I will use MEMO
2.Press F12 or nght dick on ECU and choose MANUAL COMMAND INPUT
3.Input 27 OB – this is command for ECU to send you SEED KEY REQUEST 67 OB xx xx xx xx xx
4.Then you will need send this REQUEST to ME)) or someone who will calculate SEED KEY ANSWER for you.
5.When you will have SEED KEY ANSWER you need enter 27 OC xx xx xx xx . If ECU answer 67 OC it’s mean ECU UNLOCKED. If ECU answer 7F XX XX it’s mean SEED KEY wrong. Check if SEED KEY is right.
6.DONE! You can change variant coding now. ECU will be UNLOCKED until ECU will RESET or DISCONNECTED.
Instruction for SMR-D file (Vediamo):
1.Start Vediamo and connect to ECU thru SMR-D file. For example I will use MED40
2.Go to SECURITY ACCESS or Press F12 or right click on ECU and choose MANUAL COMMAND INPUT
3.If you in SECURITY ACCESS press Request_Seed_Variantcoding and you will have Request_Seed: XX XX XX XX If use other way Input 27 OB – this is command for ECU to send you SEED KEY REQUEST 67 OB xx xx xx xx xx
4.Then you will need send this REQUEST to ME)) or someone who will calculate SEED KEY ANSWER for you.
5.Press Send_Key_Variantcodmg and enter XX XX XX XX. Or if use other way enter 27 OC xx xx xx xx.If ECU answer Send_Key_Vanantcodmg: eALL_POSITIVE or if use other way 67 OC it’s mean ECU UNLOCKED. If ECU answer 7F XX XX it’s mean SEED KEY wrong. Check if SEED KEY is right.
6.DONE! You can change variant coding now. ECU will be UNLOCKED until ECU will RESET or DISCONNECTED.
Instruction for SMR-D file (DTS Monaco):
DTS Monaco SMR-D Modular Optimized Database Import Guide
1.Start DTS Monaco and connect to ECU thru SMR-D file. For example I will use MED40
2.Go to SECURITY ACCESS
3.If you in SECURITY ACCESS press Request Seed Vanantcoding and you will have Request Seed OxXXXXXXXX
4.Then you will need send this REQUEST to ME)) or someone who will calculate SEED KEY ANSWER for you.
5.Enter XX XX XX XX in Settings Seed Key and Press Send Key Variantcoding. If ECU answer RESPONSE.PDU 0x67,0c it’s mean ECU UNLOCKED. If ECU answer 7F XX XX it’s mean SEED KEY wrong. Check if SEED KEY is right.
6.DONE! You can change variant coding now. ECU will be UNLOCKED until ECU will RESET or DISCONNECTED.
Source:
http://mhhauto.com/Thread-INFO-about-SEED-KEY-REQUEST-ANSWER?pid=908822#pid908822
People who sell seed Keys:http://mhhauto.com/User-grajek4
http://mhhauto.com/User-viktor
http://www.autoprofessionals.org/member.php?action=profile&uid=45312
Another possibility to unlock without seed key but with SCN online:
1.Connect plug-in
2.Enter via Xentry to MED40,MED177
3.Make online SCN – plug-in will break connection
4.Enter Vediamo to MED40
5.Make variant coding
Seed Key request from tree
at this example 2 security level may be reached, first the seed need to be requested.
–> Seed bytes Stufe 1 holen
Take a look into Ergebnisse in the lower area of the window The caculated Key needs to be send
—> dick at keys Stufe 1 senden -> type in area 2 —> click check at right side
simlar for seucritylevel 3
