No.5 Resetting Procedure for the Immobilizer System when Replacing the PCM or Keyless Control Module: Procedure

Fig 1: Identifying Keys For Registration

Courtesy of MAZDA MOTORS CORP.

1. Have two or more keys (key 1, key 2) ready for registration.
2. 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 only the keyless control module: Although the security light flashes and DTC 15 is displayed, this does not indicate an improper procedure. Continue to perform the procedure as indicated.
3. Connect the M-MDS to the DLC-2.
4. Select "Body/Security/PATS function" from the screen menu of the M-MDS.
5. Perform security access as indicated on the M-MDS screen. (see No.6 Security Access Procedure  .)
6. Select "Parameter Reset" from the screen menu of the M-MDS.
7. Perform security access again as indicated on the M-MDS screen. (see No.6 Security Access Procedure  .)
8. Select the replaced part as indicated on the M-MDS screen.
   • When replacing only the PCM: Select "PCM".
   • When replacing only the keyless control module: Select "RKE".
   NOTE:

   • At this time, do not select any other parts from the screen menu of the M-MDS.
9. After verifying that the PATS function menu is displayed again on the M-MDS screen, select "Exit" to complete the M-MDS function.
10. After Step 9, wait 10 s or more  and turn the ignition switch to the LOCK position using key 1.
11. 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 only the keyless control module: Although the security light flashes and DTC 21 is displayed, this does not indicate an improper procedure. Continue to perform the procedure as indicated.
12. Perform the following procedures:
    • When replacing only the PCM: After verifying that the security light goes out, turn the ignition switch to the LOCK position. (Procedure completed)
    • When replacing only the keyless control module: After verifying that the security light illuminates for 3 s  or more, turn the ignition switch to the LOCK position, remove key 1, and then go to the next step.
13. Using key 2, turn the ignition switch to the ON position.
14. Verify that the security light illuminates for approx. 3 s and then goes out.
15. After verifying that the security light goes out, turn the ignition switch to the LOCK position using key 2, and then remove key 2.
16. If an additional key needs to be registered, repeat Steps 13- 15 in the same manner as key 2. Steps 13- 15 must be performed within 1 min  for each key. If the ignition switch is maintained in the ON position for 1 min or more  , key registration according to Steps 13- 15 will not be possible. If this occurs, refer to "09-14-50 NO.1 ADDITIONAL KEY REGISTRATION PROCEDURE  (Using Two Valid Keys)" to register any additional keys.