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2008 - MX-5 - Body and Accessories

SECURITY LIGHT 13, DTC B1600/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]



SECURITY LIGHT: 13

The key ID number data cannot be read.

DTC: B1600/P1260

DETECTION CONDITION

  • The key ID number data cannot be read.

POSSIBLE CAUSE

  • No transponder in the key

  • Transponder malfunction (Key ID number is not output)

  • Coil antenna malfunction

  • Instrument cluster malfunction

  • 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

    VERIFY DTC
  • Is B1600/P1260 displayed?

Yes

Go to Step 3.

No

Go to the next step.

2

    VERIFY DTC
  • Is B2431/P1260 displayed?

Yes

Perform the DTC inspection for “SECURITY LIGHT: 13, M-MDS: B2431/P1260”.

(See SECURITY LIGHT 13, DTC B2431/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].)

No

Go to the next step.

3

    VERIFY WHETHER KEY IS VALID OR NOT
  • Are there any keys with which the engine can be started, other than the key that is a cause of the displayed DTC?

Yes

Go to Step 5.

No

Go to the next step.

4

Yes

Replace the coil antenna, then go to Step 6.

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

No

5

    VERIFY WHETHER MALFUNCTION IS IN KEY OR COIL ANTENNA
  • Using another valid key, turn the ignition switch to the ON position.

  • Verify the DTC Using the M-MDS.

    • Is B1600/P1260 displayed again?

Yes

Replace the coil antenna, then go to the next step.

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

No

6

    INSPECT INSTRUMENT CLUSTER
  • Using the registered key, turn the ignition switch to the ON position.

    • Is B1600/P1260 displayed again?

Yes

Replace the instrument cluster and perform the resetting procedure for the immobilizer system when replacing the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

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

No

DTC troubleshooting completed.




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