BMW Multi Tool OBD2 CAS1-3 +key programmer FAQ


bmw-multi-tool-ews-and-cas-connection-show.pdf  (258K)

how-to-update-bmw-multi-cas-key-tool-cardiag.co.uk.doc  (369K)
bmw-multi-tool-user-manual-english.pdf  (2.6M)
how-to-make-dealer-key-by-bmw-multi-cas-tool.doc  (331K)

how to update BMW Multi key Tool,
how to use bmw cas key tool to program keys
Difference of BMW CAS AK300,CKM100 Car Key Master, Digimaster 3,BMW Multi Tool V7.3

Function:
 
1). Get Key Info:With this function you can get the key cutting, remote frequency, and key data.
2). Save Key Info:Save the read key info.
3). Load Key Info:Load the saved key info.To see the key data and prepare for write key info.
4). Write Key Info:Write the loaded key info into CAS system.
5). Make Dealer Key:You can prepare dealer key after you get key info successfully.Also you should choose the key position.
6). Add key:Add the new dealer key into CAS system.Some CAS system needs this step to start the engine.
7). Enable Key:Insert the current key into ignition switch,press "Enable Key".The key after current key will be enabled.
8). Disable Key:Insert the current key into ignition switch,press "Disable key".The key after current key will be disabled.
9). Clear DTC:Before prepare dealer key and after it you can use this function to clear DTC.
10). Clear Shadow:Before prepare dealer key and after it you can use this function to clear Shadow.
 
8. File Make Key
1). Choose CAS or EWS type.
2). Load the choose EEPROM file you will get the make dealer key window.
3). Choose key position and press "Make Dealer Key" button. Flow the given tips to prepare dealer key. After succeed you can save the new EEPROM dump file.
- For EWS1, EWS2, EWS3, EWS4, CAS1, CAS2, CAS3 type the prepared dealer key can start the engine directly.
- For some CA3+ type you need to write back the new dump file into car.
4).CAS3 encrypt data, only OBDII prepare make key is support for CAS3 encrypt data.
 
9. Read/Restore CAS KEY information(OBDII) Disable/Enable key with working key(OBDII)
Clear DTC and Shadow (OBDII)
 
10.Prepare dealer key with CAS eeprom dump
 
11. Unlock dealer key prepared with our software with CAS eeprom dump or KEY information
 
12. Change KM in CAS and instrument dashboard with file dump
 
13. Have key programmer,you can programm dealer key directly.

How to solve bmw multi tool failed at the security access error?
 
add key obd;
cas3+ encrypt version -> no need to update CAS (no need for key cycling)
cas ISTAP4x version -> need to update cas (no need for key cycling)
 
lost key obd;
cas3+ encrypt version -> no need to update CAS (need to cycle key UPTO 16 times)
cas ISTAP4x version -> need to update CAS (need to cycle key UPTO 64 times)
 
add key dump method (lost or working key);
 
cas3+ encrypt version -> need to write back to CAS (needs either -working key / known ISN / ECU dump / or cycle UPTO 16 times)
 
cas ISTAP4x version -> no need to write back to cas (needs either -working key / known ISN / ECU dump / or cycle UPTO 64 times)
 
So the 64 cycle is really to save you having to downgrade the CAS but you still need to manually read the CAS for this option. For me this is still the best  
 
way as theres no way I would downgrade the CAS (unless you made it very clear what this meant to the client)

Customer share:

Q: Can BMW MULTI TOOL do BMW cas3 and cas3+ keys? For example, the 868 MHz key.
A: yes, BMW MULTI TOOL can do most kinds of BWM keys.

Q: Can BMW Multi Tool V5.8 do the EWS ?
A: Yes, but you should withdrawing the EWS when you want to read the data.
Reading the data you should have a CAS socket. 

Q:I lose all my keys,can I use it for my bmw car?
A:It depends,you need tell me more detail about it,if your car is CAS3,maybe can not do.

Q:Dear sales,I want to program the BMW F series,can your tool work for me?
A:It depends,friend,it can do cas1  2  3  3+.


 

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