Foreword [Immobilizer System (Advanced Keyless Entry And Push Button Start System)]

• DTCs are recorded in the PCM and keyless control module when a malfunction is detected. The stored DTCs can be verified using the flashing pattern of the security light and M-MDS. There are some DTCs which cannot be verified using the security light. Verify the DTCs that were detected using the M-MDS prior to beginning the servicing.

  (See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] .)

• If more than one DTC is detected, the security light only displays the DTC with the lowest number. Begin repairs based on the DTC displayed by the security light. All DTCs can be read by the M-MDS.
• It is possible for several DTCs to be displayed for a one malfunction cause. Erase the DTCs after one repair and then re-inspect the DTCs.
• If immobilizer system DTCs are not recorded even if the engine cannot be started, perform symptom troubleshooting.

  (See NO. 3 WILL NOT CRANK [MZR 2.5] .)

  (See NO. 3 WILL NOT CRANK [MZI 3.7 V6] .)

• The PID/data monitor function can be used to verify the number of key ID numbers programmed for a single vehicle.

(See PID/DATA MONITOR TABLE [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] .)

• Any metallic object
• Spare keys or keys for other vehicles equipped with an immobilizer system
• Any electronic device, or any credit or other card with magnetic strips
  Fig 1: Keyless Entry System Obstruction Item (Example)

  Courtesy of MAZDA MOTORS CORP.