DTC Description

DTC DETECTION LOGIC

DTC No.		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
U2140	87	CAN comm err (ECM) [Controller area network communication error (engine control module)]	1	Diagnosis condition	When electric motor 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 electric motor 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 Stored DTC or Active DTC. If DTC is Active DTC, proceed with Diagnosis Procedure. If DTC is Stored DTC, clear DTC. Do not replace the ABS actuator and electric unit (control unit) for a Stored DTC DTC.

Stored DTC DTC	Active DTC DTC
Harness or connector CAN communication line	CAN communication system

FAIL-SAFE

The following functions are suspended.

ASC function
TCS function
Brake limited slip differential (BLSD) function
Brake assist function
Brake force distribution function
hill start assist function
Electric parking brake function
Hill Descent Control funciton

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

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

2.CHECK DTC DETECTION

With M.U.T.-III SE

Electric motor switch OFF (Auto ACC function OFF).
Electric motor switch ON.
note Wait at least 10 seconds after electric motor switch ON.
Perform Diagnostic Trouble Code for “ABS".

Is DTC “U2140-87" detected?

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

-2“Stored DTC" is displayed: INSPECTION END (Erase the memory of Diagnostic Trouble Code results.)

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

-2Confirmation after repair: INSPECTION END