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

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DTC | Security light flashing pattern | 13 | Key ID number registration error
--- | --- | --- | ---
M-MDS display | Instrument cluster | B2431
PCM | P1260
  POSSIBLE CAUSE | • Any of the following items are touching or near the key head. ― Spare keys
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― Keys for other vehicles equipped with an immobilizer system ― Any metallic object ― Any electronic device, or any credit or other cards with magnetic strips • Errors during key ID number registration procedure

Diagnostic Procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | VERIFY DTC • Is B2431/P1260 displayed? | Yes | Go to Step 3.
No | Go to the next step.
2 | VERIFY DTC • Is B1600/P1260 displayed? | Yes | Perform the DTC inspection for “SECURITY LIGHT: 13, M-MDS: B1600/P1260”. (See SECURITY LIGHT 13, DTC B1600/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].)
No | Go to the next step.
3 | INSPECT INSTRUMENT CLUSTER • Using the M-MDS, clear the key ID number and re-register it. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING.) Note • Two or more keys must be registered to start the engine. • Using the registered key, turn the ignition switch to the ON position. • Verify the DTC Using the M-MDS. ― Is B2431/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-RELATED PARTS PROGRAMMING.)
No | DTC troubleshooting completed.