SECURITY LIGHT: 21, DTC: B10D8:00/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

DTC	Security light flashing pattern	21	Shortage of programmed key
DETECTION CONDITION	• Programmed key is only one.
POSSIBLE CAUSE	• Key malfunction ― Programmed key is only one. • PCM malfunction • Instrument cluster malfunction

DTC

Security light flashing pattern

Shortage of programmed key

M-MDS display

Instrument cluster

B10D8:00

PCM

P1260:00

DETECTION CONDITION

• Programmed key is only one.

POSSIBLE CAUSE

• Key malfunction

― Programmed key is only one.

• PCM malfunction

• Instrument cluster malfunction

STEP	INSPECTION	ACTION
1	VERIFY NUMBER OF PROGRAMMED KEYS • Perform the PID/data monitor inspection using the M-MDS to verify the number of programmed keys. (See PID/DATA MONITOR INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].) ― NUMKEYS (See PID/DATA MONITOR TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].) • Are two or more keys programmed?	Yes	Go to the next step.
No	Program an additional key referring to the immobilizer system-related parts programming, then go to the next step. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [KEYLESS ENTRY SYSTEM].) Note • To start the engine, two or more programmed keys are necessary.
2	VERIFY PCM MALFUNCTION • Switch the ignition to ON (engine off) using the valid key. • Clear the DTC from the instrument cluster and PCM using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR 1.5, MZR 1.6].) (See AFTER REPAIR PROCEDURE [MZR 2.0, MZR 2.5].) (See AFTER REPAIR PROCEDURE [MZR 2.0 DISI i-stop].) (See AFTER REPAIR PROCEDURE [MZR 2.3 DISI Turbo].) (See AFTER REPAIR PROCEDURE [MZ-CD 1.6].) (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) (See AFTER REPAIR PROCEDURE [SKYACTIV-G 2.0].) (See CLEARING DTC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].) • Perform the immobilizer system DTC inspection using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].) • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) (See PCM REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].) (See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See PCM REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].) (See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
No	Go to Step 4.
3	VERIFY TROUBLESHOOTING COMPLETED • Clear the DTC from the instrument cluster and PCM using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR 1.5, MZR 1.6].) (See AFTER REPAIR PROCEDURE [MZR 2.0, MZR 2.5].) (See AFTER REPAIR PROCEDURE [MZR 2.0 DISI i-stop].) (See AFTER REPAIR PROCEDURE [MZR 2.3 DISI Turbo].) (See AFTER REPAIR PROCEDURE [MZ-CD 1.6].) (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) (See AFTER REPAIR PROCEDURE [SKYACTIV-G 2.0].) (See CLEARING DTC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].) • Perform the immobilizer system DTC inspection using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].) • Is the same DTC present?	Yes	Replace the instrument cluster, then go to the next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No	Go to the next step.
4	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY NUMBER OF PROGRAMMED KEYS

• Perform the PID/data monitor inspection using the M-MDS to verify the number of programmed keys.

(See PID/DATA MONITOR INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].)

― NUMKEYS

(See PID/DATA MONITOR TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].)

• Are two or more keys programmed?

Yes

Go to the next step.

Program an additional key referring to the immobilizer system-related parts programming, then go to the next step.