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2008 - MX-5 - Body and Accessories

SECURITY LIGHT 21, DTC B1213/B1213/P1260 [IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]



DTC

Security light flashing pattern

21

Number of valid keys is below minimum

M-MDS display

Keyless control module

B1213

Instrument cluster

B1213

PCM

P1260

POSSIBLE CAUSE

  • Less than two valid keys


Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY NUMBER OF VALID KEYS
  • Check following PID/DATA monitor with M-MDS.

    • NUMKEYS

  • Is NUMKEYS displayed more than 2?

NOTE:

  • To start the engine, two or more keys need to be registered.

Yes

Replace instrument cluster and reprogram immobilizer system.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION)

No

  • Erase key ID numbers and register necessary key ID numbers.

  • Go to next step.

2

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

  • Is the DTC displayed?

    • Security light: 21

    • M-MDS: B1213/B1213/P1260

Yes

Replace instrument cluster and reprogram immobilizer system.

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

No

DTC troubleshooting completed.




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