No. 3 PCM Replacement Procedure: Procedure

Fig 1: Key/Card Reference Chart

Courtesy of MAZDA MOTORS CORP.

1. Turn the ignition switch to the LOCK. position
2. Connect the M-MDS to the DLC-2. (See M-MDS Connecting Procedure .)
3. Using a valid key or card key, turn the ignition switch to the ON position.
   NOTE: Although the security light remains illuminated and DTC 23 is displayed after approx. 1 min, this does not indicate an improper procedure. Continue to perform the procedure as indicated.
4. Verify that the keyless warning light illuminates for approx. 3 s, and then.goes out.
5. Select "BODY/SECURITY/PATS (immobilizer) function" from the M-MDS screen menu.
6. Select "Parameter Reset" from the M-MDS screen menu.
7. Perform the security access according to the directions on the M-MDS screen.
8. After verifying that the PATS function menu is displayed again on the M-MDS screen, select "Exit (From This Menu)" to finish the M-MDS procedure.
9. After Step 8  , wait 5 s or more, and then turn the ignition switch to the LOCK position.
10. Turn the ignition switch to the ON position.
11. After verifying that the security light and keyless warning light illuminates for 3 s or more turn the ignition switch I to the LOCK position.
12. Verify that the all keys can start the engine for 5 s or more after the procedure