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2008 - MX-5 - Body and Accessories

SECURITY LIGHT 11, DTC -/B1681/P1260 [IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]



DTC

Security light flashing pattern

11

Communication error between the keyless control module and the instrument cluster

M-MDS display

Keyless control module

-

Instrument cluster

B1681

PCM

P1260

POSSIBLE CAUSE

  • Defective wiring harness

  • Defective instrument cluster


Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT COMMUNICATION CIRCUIT FOR CONTINUITY
  • Disconnect keyless control module and instrument cluster connectors.

  • Is there continuity between the following terminals?

    • 3A—2S

    • 3C—2Q

Yes

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

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

No

Repair the wiring harness between the keyless control module and instrument cluster, then go to the next step.

2

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

  • Is the DTC displayed?

    • Security light: 11

    • M-MDS: -/B1681/P1260

Yes

Replace instrument cluster and reprogram immobilizer system.

No

DTC troubleshooting completed.




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