AK90 is mainly for regular keys and EWS3/4 systems older BMWs not for smart keys. Let’s see its capacity to EWS4.
Notice: disconnect battery before removing EWS module.
Step 1. Connection
EWS info. (Mask: 2L86D)
Connect the ribbon cable to VXSCAN Adapter. (Care J1 and J2 position, here is J1.)
Connect AK90, VXSCAN and the ribbon cable. (Do connect to the right EWS port, here is EWS4.)
Align the pins and install EWS circuit board on VXSCAN adapter.
Connect AK90 to PC via USB cable.
Step 2. Read EWS data
Run AK90 app, and it’ll beep once which means good connection.
Then select “2L86D[Cable]”.
There is no adapter on the diagram, so ignore it and go ahead.
Read and save EWS data. (to make a good connection, have to slight press the circuit board.)
Step 3. Write key
Click on “Write key”.
Select unused key position and transponder type. (If it’s an aftermarket key, select “PCF7930/35”; if it’s an original key, select “10030A[EML]”)
Here are “Key09” and “PCF7930/35”.
Put a new key into the key slot.
When it is done, it will beep once again.
Repeat the process to add the second new key.
Step 4. Verify key
Enter “EWS Analyze”, we can see the key positions we used are still new. (Key 8 & 9).
So, we need to write back new EWS data.
Tick “8” and “9”, and click on “Write Back To EWS”.
Tick “2L86D”. Must select the correct option.
Write data OK.
Enter “Test Key” to verify again.
Credits to MY KEYS AUTOMOTIVE.
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