SECURITY LIGHT 12, DTC B2103/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5800700

DTC

Security light flashing pattern

12
•  Coil antenna malfunction
•  PCM determined a malfunction in coil antenna even though it is normal.

M-MDS display

Instrument cluster

B2103

PCM

P1260
POSSIBLE CAUSE
•  Poor connection of the coil antenna connector
•  Coil antenna malfunction
•  PCM malfunction


Diagnostic Procedure

STEP

INSPECTION

ACTION
1
INSPECT CONNECTOR CONNECTION
•  Are the coil antenna connector and the instrument cluster connector securely connected?
Yes
Replace the coil antenna, then go to the next step.
(See COIL ANTENNA REMOVAL/INSTALLATION.)
No
Connect the connector securely.
2
INSPECT PCM
•  Turn the ignition switch to the ON position.
•  Is the DTC displayed?
―  Security light: 12
―  M-MDS: B2103/P1260
Yes
Replace the PCM and perform the resetting procedure for the immobilizer system when replacing the PCM.
(See PCM REMOVAL/INSTALLATION [L8, LF].)
(See COIL ANTENNA REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.