SECURITY LIGHT 23, DTC B2139/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5801500

DTC

Security light flashing pattern

23

ID number data in the PCM and the instrument cluster do not match.

M-MDS display

Instrument cluster

B2139

PCM

P1260
POSSIBLE CAUSE
•  Necessary procedures were not performed using the M-MDS after replacing the PCM.
•  Instrument cluster malfunction
•  PCM malfunction


Diagnostic Procedure

STEP

INSPECTION

ACTION
1
VERIFY DTC
•  Are either U1900 or U0073, or both, displayed, by either the instrument cluster or the PCM, or both?
Yes
Perform troubleshooting according to the corresponding DTC inspection.
(See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)].)
(See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D.)].)
No
Go to the next step.
2
EXAMINE INSTRUMENT CLUSTER AND PCM
•  Perform procedures for when replacing the PCM only.
•  Using the registered key, turn the ignition switch to the ON position.
•  Is the DTC displayed?
―  Security light: 23
―  M-MDS: B2139/P1260
Yes
•  Replace the instrument cluster and perform the resetting procedure for the immobilizer system when replacing the instrument cluster.
•  Go to the next step.
No
DTC troubleshooting completed.
3
VERIFY DTC
•  Is the DTC displayed again?
―  Security light: 23
―  M-MDS: B2139/P1260
Yes
•  Replace the PCM and perform the resetting procedure for the immobilizer system when replacing the PCM.
No
DTC troubleshooting completed.