How to use Yanhua Mini ACDP (ACDP1/ACDP2) to change mileage on BMW CAS4/CAS4+?

First remove the cluster from the vehicle before resetting the CAS mileage via OBD, and then disassemble the instrument chip to modify mileage. After modification, install the instrument panel back to the car and check if the new mileage is correct.

Yanhua ACDP 1/Mini ACDP 2 OBD connection:

Step 1: Reset CAS4 Mileage via OBD

Open Mini ACDP APP

Confirm the ACDP device is connected

Select BMW>> CAS1~4 >> CAS4/CAS4+>> OBD mode>> IMMO/Mileage>> Reset mileage

Use the ACDP standard power adapter (voltage+ 12V, current>=2.5A)

Device is being reconnected

Connect ACDP with vehicle OBD port

Make a screenshot to save the vehicle info incl. original mileage read out

Pay attention to the on-screen prompt:

• Need to disassemble the dashboard from car and modify the mileage first, put it back after resetting the CAS4 mileage.

If the ECU does not pre-process, preprogram it first.

Backup coding file…

Backup file succeeded. Pay attention to the path to save the file

Pre-process ECU system finished

Reset mileage finished

Record the operation log path

Select OBD detect

Confirm use the ACDP standard power adapter (voltage+ 12V, current>=2.5A) and connect Yanhua ACDP2/ACDP1 with vehicle OBD port

Now the CAS mileage has been set to 0.

Identify system info finish

Step 2: Change Mileage of the Instrument Chip

Disassemble the instrument to confirm the instrument chip

Select M35XX and select the corresponding chip type (i.e 160DOWT)

The overall connection diagram of the instrument chip (ICP method and OBD method) is shown in the following figure.

Select Modify mileage

Confirm use the ACDP standard power adapter and connect ACDP device with M35XXX adapter

Detect probe Pins successfully. The test results are normal.

Save the result

Check if the mileage read is correct (i.e.140856)

Input a new mileage (i.e.50000)

Program execution completed

Select Backup data

Confirm use the ACDP standard power adapter and Mini ACDP 1/ACDP-2 device connect with the Yanhua M35XX adapter

Test the probe Pins successfully

Save the data and remember the file name

Modify mileage successfully

Finally, install the instrument panel into the car and check if the mileage displayed on the panel is normal.

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