No. 5 Resetting Procedure For The Immobilizer System When Replacing The PCM Or Keyless Control Module Conditions

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.

When only replacing the PCM: No conditions.
When only replacing the keyless control module: Customer has two or more keys for registration after replacement.
PCM and keyless control module replaced at the same time: Customer has two or more keys for registration after replacement.

CAUTION:

When replacing the PCM and the keyless control module at the same time, follow the same instructions described in the procedure for "when replacing the keyless control module".
When replacing only the PCM, start from Step 2. Also, when key 1 is indicated within the procedure, any valid key can be used.
Before starting Step 1, complete the procedure for PCM and keyless control module replacement.
Procedure

Fig 1: Identifying Key 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 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.
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 indicate on the WDS or equivalent screen. (See NO. 6 SECURITY ACCESS PROCEDURE .)
Select "Parameter Reset" 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 the replaced part as indicated on the WDS or equivalent 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 WDS or equivalent.
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 9, wait 10 s or more and turn the ignition switch to the LOCK position using key 1.
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.
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.
Using key 2, turn the ignition switch to the ON position.
Verify that the security light illuminates for approx. 3 s and then goes out.
After verifying that the security light goes out, turn the ignition switch to the LOCK position using key 2, and then remove key 2.
If an additional key needs to be registered, repeat Steps 13- 15 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 "NO. 1 ADDITIONAL KEY REGISTRATION PROCEDURE (USING 2 VALID KEYS)" to register any additional keys.