SECURITY LIGHT 22, DTC B2141/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5801400

DTC

Security light flashing pattern

22

Communication error between the instrument cluster and the PCM (data transfer error)

M-MDS display

Instrument cluster

B2141

PCM

P1260
POSSIBLE CAUSE
•  Malfunction in the wiring harness (CAN line) between the instrument cluster and 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
VERIFY DTC
•  Using the registered key, turn the ignition switch to the ON position.
•  Is the DTC displayed?
―  Security light: 22
―  M-MDS: B2141/P1260
Yes
•  Replace the PCM and perform the resetting procedure for the immobilizer system when replacing the PCM.
•  Go to the next step.
No
DTC troubleshooting completed.
3
EXAMINE INSTRUMENT CLUSTER AND PCM
•  Is the DTC displayed again?
―  Security light: 22
―  M-MDS: B2141/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.
4
EXAMINE PCM
•  Is the DTC displayed again?
―  Security light: 22
―  M-MDS: B2141/P1260
Yes
•  Replace the PCM and perform the resetting procedure for the immobilizer system when replacing the PCM.
No
DTC troubleshooting completed.