If you encounter issues while using Xhorse VVDI2 or VVDI KEY TOOL PLUS in 48OEM service mode AKL for VW 4th Generation, don’t worry! Follow this post to get the operating methods and essential precautions to ensure a smooth experience.
Supported login modules for service mode AKL:
CDCXX+24C32
NEC24C64 (2013-)
A3/TT/R8 (CDC32XX)
AUDI A1
AUDI Q3
NEC24C32
NEC24C64
NEC24C64 USE TFT COLOR DISPL AY (-2012)
NEC24C64 USE TFT COLOR DISPL AY (2013-)
Operation guide:
Step 1: Back up ABS Coding
Path: Immo programming/ VW/ Select by type/4th immo system- Volkswagen/Skoda/Seat/
Select the supported module (e.g. NEC+24C64)
Select More functions>> ABS Coding>> Backup
Step 2: Remove chip and read Data
Step 3: Generate service EEPROM
Select Service Mode>> BDM Method: Prepare service mode EEPROM>> Generate service % EEPROM
Step 4: Write service EEPROM dump file to chip
Step 5: Restore dashboard and select login Module
Step 6: Load original EEPROM dump, activate OBD, and write EEPROM
Select More functions>> Write EEPROM
Step 7: Read and save IMMO data, prepare dealer key, add key, and reset dashboard
Select Read Immo Data
Step 8: Restore ABS if coding is lost
If ABS coding is lost, select More functions>> ABS Coding>> Restore to operate
IMPORTANT NOTES:
Note 1:
For step 1 to step 4, ensure you select the correct module and proceed with reading as normal.
Be sure to save the original data
Never write service mode data without first backing up the original data
To differentiate between files, it’s advisable to use distinct file names for the service mode file and the original data
After writing the service mode data, compare it with the generated service mode file to ensure it can be written correctly.
Note 2:
For step 5, confirm that you select the correct login module
It’s recommended to take a photo of the automatic diagnostic type when initially connecting the devices for automatic diagnosis.
For example, if the device automatically identified as 24C64 (2013-), but in step 5, you select the TFT color display (-2012), you will encounter a failure prompt in step 6.
In this case, re-diagnose the dashboard to determine the correct type, select the corresponding type, enter more function, and write EEPROM to resolve the issue.
After writing the original EEPROM data, the device will prompt you to restore the dashboard (as it typically requires a reset after writing the original EE) (for step 7)
However, since this is for service mode AKL, the dashboard can only be restored after reading the immo data.
Therefore, do not tap on reset at this point or it will indicate that the car key is not detected during immo data reading.
This is a common issue, you must be cautions.
The restoration can only be done after reading the immo data. If this step is accidentally performed incorrectly, the solution is to repeat the process, generate the service mode file, write it again, and then perform the OBD write back to the EEPROM operation.
Note 3:
When you are writing original EEPROM data, follow the prompts below to operate.
1.For Mechanical keys (blade keys)
Insert the key to turn on the dashboard and write the original EEPROM data via OBD.
2.For Smart Keys:
Short- circuit OBD pin1 and pin16, then turn on the dashboard and write the original EEPROM data via OBD.
In addition, the Audi Q3 has specific requirements.
In this case, you need to short-circuit the ELV, then turn on the dashboard and write the original EEPROM data via OBD. Otherwise, an error message stating “car key required” will be displayed, preventing writing via OBD.
That’s the operation guide and tips to do VW 4th AKL in Service Mode by Xhorse VVDI2 Key Programmer or Xhorse Key Tool Plus Pad. Hope it helps you!
