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2008 - MX-5 - Body and Accessories

SECURITY LIGHT 12, DTC B2103/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]



SECURITY LIGHT: 12

  • Coil antenna malfunction

  • The PCM determined a malfunction in the coil antenna even though it is normal.

DTC: B2103/P1260

DETECTION CONDITION

  • Coil antenna malfunction

  • The PCM determined a malfunction in the coil antenna even though it is normal.

POSSIBLE CAUSE

  • Coil antenna malfunction

  • Poor connection of the coil antenna connector

  • PCM malfunction


Diagnostic Procedure



STEP

INSPECTION

ACTION

1

    INSPECT CONNECTOR CONNECTION
  • Are the coil antenna connector and the instrument cluster connector securely connected?

Yes

Replace the coil antenna, then go to the next step.

(See COIL ANTENNA REMOVAL/INSTALLATION [KEYLESS ENTRY SYSTEM].)

No

Connect the connector securely.

2

    INSPECT PCM
  • Turn the ignition switch to the ON position.

  • Is the DTC displayed?

    • Security light: 12

    • M-MDS: B2103/P1260

Yes

Replace the PCM and perform the resetting procedure for the immobilizer system when replacing the PCM.

(See PCM REMOVAL/INSTALLATION [LF].)

(See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [KEYLESS ENTRY SYSTEM].)

No

DTC troubleshooting completed.




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