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2008 - MX-5 - Body and Accessories

SECURITY LIGHT 15, DTC -/B1601/P1260 [IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]



DTC

Security light flashing pattern

15

PCM received incorrect ID number from key (transponder)

M-MDS display

Keyless control module

-

Instrument cluster

B1601

PCM

P1260

POSSIBLE CAUSE

  • No keys have been registered after installation of new instrument cluster

  • Unregistered key detected

  • Attempt made to register a ninth key

    NOTE:

    • A maximum of only eight keys can be registered for a single vehicle.

  • Defective keyless control module

  • Defective instrument cluster


Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY REGISTERED KEY IN PCM
  • Check following PID/DATA monitor using M-MDS.

    • NUMKEYS

  • Is NUMKEYS displayed more than 2?

Yes

Go to next step.

No

Go to Step 3.

2

VERIFY REGISTERED KEY IN PCM
  • Check following PID/DATA monitor using M-MDS.

    • NUMKEYS

  • Is NUMKEYS displayed more than 8?

Yes

No

Go to next step.

3

VERIFY WHETHER MALFUNCTION IS IN COIL ANTENNA OR KEY

Yes

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

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

No

DTC troubleshooting completed.

4

INSPECT INSTRUMENT CLUSTER
  • Turn the ignition switch to the ON position.

  • Is the DTC displayed?

    • Security light: 15

    • M-MDS: -/B1601/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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