DTC Description

DTC DETECTION LOGIC

DTC No.		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
U2240	87	CAN comm err (ECM) [Controller area network communication error (engine control module)]	1	Diagnosis condition	When ignition switch is ON. When the power supply voltage is normal.
				Signal (terminal)	CAN communication signal
				Threshold	When CAN communication signal is not continuously transmitted to ECM.
				Diagnosis delay time	2 seconds or more
			2	Diagnosis condition	When ignition switch is ON. When the power supply voltage is normal.
				Signal (terminal)	CAN communication signal
				Threshold	When CAN communication signal is not continuously received from ECM.
				Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

note	Confirm if DTC is PAST or CRNT. If DTC is CRNT, proceed with Diagnosis Procedure. If DTC is PAST, clear DTC. Do not replace the ABS actuator and electric unit (control unit) for a PAST DTC.

PAST DTC	CRNT DTC
Harness or connector CAN communication line	CAN communication system

FAIL-SAFE

The following functions are suspended.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always ignition switch OFF (Auto ACC function OFF) before conducting the next test.

2.CHECK DTC DETECTION

With M.U.T.-III SE

Is DTC “U2240-87” detected?

-1“Active DTC” is displayed: Refer to Diagnosis Procedure

-2“Stored DTC” is displayed: INSPECTION END (Erase the memory of self-diagnosis results.)

-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident

-2Confirmation after repair: INSPECTION END