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SECURITY LIGHT: 13, DTC B1600/P1260

BHE090201077W08

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 malfunction • Keyless unit 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 USING WDS • Is B1600/P1260 displayed? | Yes | Go to Step 3.
No | Go to the next step.
2 | VERIFY DTC USING WDS • Is B2431/P1260 displayed? | Yes | SECURITY LIGHT: 13, WDS: B2431/P1260. (See SECURITY LIGHT: 13, DTC B2431/P1260.)
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 | VERIFY WHETHER MALFUNCTION IS IN KEY OR COIL • Using the WDS, register an additional key. (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING.) • Using the registered key, turn the ignition switch to the ON position. • Verify the DTC using the WDS. – Is B1600/P1260 displayed again? | Yes | Replace the coil, then go to Step 6. (See COIL REMOVAL/INSTALLATION.)
No | • Dispose of the malfunctioning key. • Register a new key if necessary. (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING.)
5 | VERIFY WHETHER MALFUNCTION IS IN KEY OR COIL • Using another valid key, turn the ignition switch to the ON position. • Verify the DTC Using the WDS. – Is B1600/P1260 displayed again? | Yes | Replace the coil, then go to the next step. (See COIL REMOVAL/INSTALLATION.)
No | • Dispose of the malfunctioning key. • Register a new key if necessary. (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING.)
6 | INSPECT KEYLESS UNIT • Using the registered key, turn the ignition switch to the ON position. – Is B1600/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.