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This case demonstrates replacing the ECM/PCM in a HONDA vehicle using the VXDIAG device. The HDS system is used to synchronize the ECM/PCM with the Immobilizer Control Unit and Keyless Access System, ensuring the engine starts correctly.
I. Replace ECM/PCM [Video]
When the ECM/PCM is replaced, it is necessary to synchronize the ECM/PCM and the Immobilizer Control Unit-Receiver using the HDS (Honda Diagnostic System). For vehicles with Keyless Access System, the ECM/PCM must also be synchronized with the Keyless Access Control Unit; otherwise, the engine cannot be started.
Step-by-step ECM/PCM Replacement Process:
- From the System Selection Menu, click [IMMOBI].
![click [IMMOBI]](https://cdn.shopify.com/s/files/1/0886/0300/1105/files/click_IMMOBI_480x480.png?v=1725509461)
- Click [Replace ECM/PCM].
![Click [Replace ecm/PCM]](https://cdn.shopify.com/s/files/1/0886/0300/1105/files/Click_1_480x480.png?v=1725509544)
- Press tick to continue.
(Obtain PCM-code from maris2/genpo/Distributor.)
- Input PCM-code and press tick to continue.
(The PCM-code is calculated using the Acura Code Generator.)
- Turn the ignition switch off.

- Turn the ignition switch on.

- Turn the ignition switch off again.
(The registration of immobilizer codes into the Immobilizer unit has been completed.)
- Press tick to continue.
(Check all keys to ensure each can start the engine.)
- Click [NO] when asked if the vehicle is equipped with a Keyless Access Remote System.
![Click [NO] when asked if the vehicle is equipped with a Keyless Access Remote System.](https://cdn.shopify.com/s/files/1/0886/0300/1105/files/Click_NO_480x480.png?v=1725509966)
- Registration is complete. Press tick to continue.

-
Video: Replace ecm/PCM.
Direct preview may result in reduced video quality. We recommend downloading the video for better viewing experience.
II. Cancel Open Web Page When HONDA HDS Starts:
In Honda Diagnostic System version 3.014.011, web pages open automatically during each operation, but you can disable this:
- Click [F12].
![Click [F12]](https://cdn.shopify.com/s/files/1/0886/0300/1105/files/Click_F12_480x480.png?v=1725510151)
- Navigate to [Service Information Search Server URL].

- Select [Non-Network].
![Select [Non-Network]](https://cdn.shopify.com/s/files/1/0886/0300/1105/files/Select_Non-Network_480x480.png?v=1725510212)
If you have any questions or need further assistance, please feel free to contact us via online chat or email:
Email: support@vxdiag.com
