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2008 - MX-5 - Body and Accessories

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



DTC

Security light flashing pattern

12

Coil Antenna failure

M-MDS display

Keyless control module

B2103

Instrument cluster

B2103

PCM

P1260

POSSIBLE CAUSE

  • Defective coil antenna

  • Poor connection of coil antenna connector

  • Defective keyless control module


Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT CONNECTOR CONNECTION
  • Is connector of coil antenna and keyless control module connected securely?

Yes

Replace coil antenna.

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

No

Connect connector securely.

2

INSPECT KEYLESS CONTROL MODULE
  • Turn the ignition switch to the ON position.

  • Is the DTC displayed?

    • Security light: 12

    • M-MDS: B2103/B2103/P1260

Yes

Replace instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION)

No

DTC troubleshooting completed.




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