SECURITY LIGHT: 22, DTC B2141/P1260 [IMMOBILIZER SYSTEM]

id0902e4903900

SECURITY LIGHT: 22	Communication error between the keyless control module and the PCM (data transfer error)
DTC: B1241/P1260
DETECTION CONDITION	•  Communication error between the keyless control module and the PCM (data transfer error)
POSSIBLE CAUSE	•  Malfunction in the wiring harness (CAN line) between the keyless control module and the PCM •  Keyless control module malfunction •  PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY DTC USING M-MDS •  Are either U1900 or U0073, or both displayed, by either the keyless control module or the PCM, or both?	Yes	Perform troubleshooting according to the corresponding DTC inspection.
		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	•  Perform procedures for when replacing the PCM only. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [WITH KEYLESS ENTRY SYSTEM].) •  Go to the next step.
		No	DTC troubleshooting completed.
3	EXAMINE KEYLESS CONTROL MODULE AND PCM •  Is the DTC displayed again? ―  SECURITY LIGHT: 22 ―  M-MDS: B2141/P1260	Yes	•  Replace the keyless control module and perform procedures for when replacing the keyless control module only. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.) (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [WITH KEYLESS ENTRY SYSTEM].) •  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 procedures for when replacing the PCM only. (See PCM REMOVAL/INSTALLATION [13B-MSP].) (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [WITH KEYLESS ENTRY SYSTEM].)
		No	DTC troubleshooting completed.