No. 4 Changing The Method For Registering Additional Keys

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

This procedure is for changing the enable/disable setting of the "No.1 Additional Key Registration Procedure (Using Two Valid Keys)"
The default setting for new vehicles and keyless control modules is "Enabled"
By disabling the "No.1 Additional Key Registration Procedure (Using Two Valid Keys), only the WDS or equivalent can be used to register additional keys, thereby preventing two valid keys from being used to create an unauthorized spare key. This function is for use by rental car or other companies with vehicle fleets.

Procedure

Using any key, turn the ignition switch to the ON position. (Either a valid or an unregistered key can be used.)
NOTE:
- When using an unregistered key, although the security light flashes and DTC 15 is displayed, this does not indicate an improper procedure. Continue to perform the procedure as indicated.
Connect the WDS or equivalent to the DLC-2.
Select "Body/Security/PATS function" from the screen menu of the WDS or equivalent.
Perform security access as indicated on the WDS or equivalent screen. (See NO. 6 SECURITY ACCESS PROCEDURE .)
Select either "Customer Spare Key Programming Enable" or "Customer Spare Key Programming Disable" from the screen menu of the WDS or equivalent. Depending on the selected menu, the additional key registration method is as shown below:

Fig 1: Registration Procedure For Keys
Courtesy of MAZDA MOTORS CORP.
After verifying that the PATS function menu is displayed again on the WDS or equivalent screen, select "Exit" to complete the WDS or equivalent function.
After Step 6, wait 10 s or more and then turn the ignition switch to the LOCK position.