No.4 PCM Replacement Procedure: Procedure

Fig 1: PCM Replacement Procedure

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 menu .)
3. Using a valid key 1 or card key 1, 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. After the vehicle is identified, select the following items from the initial screen of the M-MDS.
   • When using the IDS (laptop PC)
     • Select the "Toolbox" tab.
     • Select "Body".
     • Select "Security".
   • When using the PDS (Pocket PC)
     • Select "Programming".
6. Then, select items from the screen menu in the following order.
   • Select "PATS Functions".
7. Select "Parameter Reset" from the M-MDS screen menu and perform the procedure according to the M-MDS screen
8. Perform the security access according to the directions on the M-MDS screen. (See SECURITY ACCESS PROCEDURE .)
9. Select the replaced parts according to the directions on the M-MDS.
   • If the PCM is replaced: Select "PCM".
   NOTE:

   • At this time, do not select the other parts from the M-MDS menu.
10. 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.
11. After Step 10, wait 5 s or more,  and then turn the ignition switch to the LOCK position.
12. Using key 1, turn the ignition switch to the ON position.
13. After verifying that the security light and keyless warning light illuminates for 3 s or more  turn the ignition switch to the LOCK position and remove key 1.
14. Verify that the all keys can start the engine for 5 s or more  after the procedure.