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. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING.) • 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. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.) (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING.) • 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. (See PCM REMOVAL/INSTALLATION [L8, LF].) (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING.)
No | DTC troubleshooting completed.