No.5 Resetting Procedure for the Immobilizer System when Replacing the PCM or Instrument Cluster Conditions: Procedure

WARNING: This page is about a different car, the 2007 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Keys For Registration

Courtesy of MAZDA MOTORS CORP.

Have two or more keys (key 1, key 2) ready for registration.
Using key 1, turn the ignition switch to the ON position.
NOTE:
- When replacing only the PCM: The security light illuminates for 3 s and then goes out.
- When replacing the instrument cluster: 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 M-MDS to the DLC-2.
Select "Body/Security/PATS function" from the M-MDS screen menu.
Perform security access as indicated on the M-MDS screen. (See NO.6 SECURITY ACCESS PROCEDURE .)
Select "Parameter Reset" from the M-MDS screen menu.
Perform security access again as indicated on the M-MDS screen. (See NO.6 SECURITY ACCESS PROCEDURE .)
Select the replaced part as indicated on the M-MDS screen.
- When replacing only the PCM: Select "PCM".
- When replacing only the instrument cluster: Select "HEC".
NOTE:
- At this time, do not select any other parts from the M-MDS screen menu.
Perform the tasks according to the M-MDS screen.