Security Light: 14, DTC: B10D7:81/P1260:00 [Immobilizer System (Advanced Keyless Entry And Push Button Start System)]

DTC	Security light flashing pattern		14	Receiving erratic serial data
	M-MDS display	Keyless control module	B10D7:81
		PCM	P1260:00
DETECTION CONDITION				Keyless control module cannot read the key ID number data normally.
POSSIBLE CAUSE				Coil antenna connector or terminals malfunction Keyless control module connector or terminals malfunction Key (transponder) malfunction Coil antenna malfunction PCM malfunction Keyless control module malfunction NOTE: If any of the following items are touching or near key head, signal communication between key and vehicle is negatively affected, resulting in engine not starting: Spare keys EXAMPLES: Keys for other vehicles equipped with an immobilizer system Any metallic object Any electronic device, or any credit or other card with magnetic strips

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT COIL ANTENNA CONNECTOR AND TERMINALS  Switch the ignition to off. Disconnect the negative battery cable. Disconnect the coil antenna connector. Inspect the connector and terminals (corrosion, damage, pin disconnection). Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 6.
		No	Go to the next step.
2	INSPECT KEYLESS CONTROL MODULE CONNECTOR AND TERMINALS  Disconnect the keyless control module connector. Inspect the connector and terminals (corrosion, damage, pin disconnection). Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 6.
		No	Go to the next step.
3	VERIFY WHETHER THERE IS A VALID KEY  Are there any valid keys which can start the engine other than the cause of the displayed DTC?	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 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] ).
4	VERIFY WHETHER MALFUNCTION IS CAUSED BY KEY OR COIL ANTENNA  Make sure to reconnect the disconnected connector. Reconnect the negative battery cable. Switch the ignition to ON (engine off) using the valid key other than the cause of the displayed DTC. Clear the DTC from the keyless control module and PCM using the M-MDS. (See CLEARING DTC [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ). (See AFTER REPAIR PROCEDURE [LF, L5] ). (See AFTER REPAIR PROCEDURE [L3 WITH TC] ). Perform the immobilizer system DTC inspection using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ). Is the same DTC present?	Yes	Replace the coil antenna, then go to the next step. (See COIL ANTENNA REMOVAL/INSTALLATION ).
		No	Dispose of the malfunctioning key and program a new key if necessary, then go to Step 7. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] ). NOTE: To start the engine, two or more programmed keys are necessary.
5	VERIFY PCM MALFUNCTION  Clear the DTC from the keyless control module and PCM using the M-MDS. (See CLEARING DTC [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ). (See AFTER REPAIR PROCEDURE [LF, L5] ). (See AFTER REPAIR PROCEDURE [L3 WITH TC] ). Perform the immobilizer system DTC inspection using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ). Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [LF, L5] ). (See PCM REMOVAL/INSTALLATION [L3 WITH TC] ).
		No	Go to Step 7.
6	VERIFY TROUBLESHOOTING COMPLETED  Make sure to reconnect the disconnected connector. Reconnect the negative battery cable. Clear the DTC from the keyless control module and PCM using the M-MDS. (See CLEARING DTC [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ). (See AFTER REPAIR PROCEDURE [LF, L5] ). (See AFTER REPAIR PROCEDURE [L3 WITH TC] ). Perform the immobilizer system DTC inspection using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ). Is the same DTC present?	Yes	Replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION ).
		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)] ).
		No	DTC troubleshooting completed.