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When the customer has only one valid key (code word is required)

WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Various Keys (4 Of 6)
G03701255Courtesy of MAZDA MOTORS CORP.
NOTE:
  • If no specific time interval is given, each step should be performed within 30 seconds of the previous step.
  1. Cut new transponder-equipped key(s) if necessary.
  2. Replace the PCM.
  3. Insert key 1 into the steering lock and turn the key to the ON position. (1) Verify that the security light illuminates.
  4. After verifying that the security light goes off, turn key 1 to the LOCK position. (1) Remove the key from the steering lock and wait for 2 seconds or more. 
  5. Insert key 2 into the steering lock and wait for 1 second or more. 
  6. Remove and insert key 2 five times  at no more than 1-second intervals. 
    1. After the final key insertion, verify that the security light flashes. (300 ms  ON- 300 ms  OFF)
    2. Wait for 5 minutes  until the security light flashes at 1.2-second intervals. 
    3. Input the code word. (See CODE WORD INPUT PROCEDURE .)
    4. After verifying that the security light has switched from flashing to straight illumination, turn the key to the ON position.
    5. After verifying that the security light goes off, turn the key to the LOCK position and remove from the steering lock.
  7. Insert key 3 into the steering lock and turn the key to the ON position.
    1. Verify that the security light illuminates for 1-2 seconds. 
    2. After verifying that the security light goes off, turn the key to the LOCK position.
  8. If there are 4-8 keys (valid and/or new keys), repeat Step 8 with each key.
  9. Wait for 30 seconds. 
  10. After reprogramming, clear DTCs stored in the PCM.