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SECURITY LIGHT: 13, DTC B2431/P1260

BHE090201077W09

SECURITY LIGHT: 13 | Key ID number registration error
DTC: B2431/P1260
DETECTION CONDITION | • Key ID number registration error
POSSIBLE CAUSE | • Errors during key ID number registration procedure • 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 USING WDS • Is B2431/P1260 displayed? | Yes | Go to Step 3.
No | Go to the next step.
2 | VERIFY DTC USING WDS • Is B1600/P1260 displayed? | Yes | SECURITY LIGHT: 13, WDS: B1600/P1260. (See SECURITY LIGHT: 13, DTC B1600/P1260.)
No | Go to the next step.
3 | INSPECT KEYLESS UNIT • Using the WDS, clear the key ID number and re-register it. (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING.) 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 WDS. – Is B2431/P1260 displayed again? | Yes | Replace the keyless unit and perform procedures for when replacing the keyless unit only. (See KEYLESS UNIT REMOVAL/INSTALLATION.) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING.)
No | DTC troubleshooting completed.