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2008 - MX-5 - Body and Accessories

SECURITY LIGHT 14, DTC -/B1602/P1260 [IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]



DTC

Security light flashing pattern

14

PCM received invalid format of ID number from transponder

M-MDS display

Keyless control module

-

Instrument cluster

B1602

PCM

P1260

POSSIBLE CAUSE

  • Defective transponder in the key

  • Defective coil antenna

  • Defective PCM

  • Defective keyless control module

  • Any of the following items are touching or near the key head.

    • Spare keys

    • Keys for other vehicles equipped with an immobilizer system

    • Any metallic object

    • Any electronic device, or any credit or other cards with magnetic strips


Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT FOR OTHER PROPER KEYS

Yes

Replace coil antenna, then go to next step.

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

No

2

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

  • Is the DTC displayed?

    • Security light: 14

    • M-MDS: -/B1602/P1260

Yes

Replace keyless control module, then go to the next step.

(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS SYSTEM])

No

DTC troubleshooting completed.




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