DTC Description

DTC DETECTION LOGIC

DTC No.		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
U234A	87	CAN comm err (AWD/4WD) [Controller area network communication error (AWD/4WD control unit)]	1	Diagnosis condition	When ignition switch is ON.
				Signal (terminal)	CAN communication signal
				Threshold	Not transmitting to AWD control unit.
				Diagnosis delay time	2 seconds or more
			2	Diagnosis condition	When ignition switch is ON.
				Signal (terminal)	CAN communication signal
				Threshold	Not receiving from AWD control unit.
				Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication system
AWD control unit

FAIL-SAFE

Normal control

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always ignition switch OFF and wait at least 10 seconds before conducting the next test.

2.CHECK DTC DETECTION

With M.U.T.-III SE

Ignition switch OFF to ON.
caution Be sure to wait of 10 seconds after ignition switch OFF or ON.
Perform self-diagnosis for “CHASSIS CONTROL”.

Is DTC “U234A-87” detected?

Refer to Diagnosis Procedure

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

-2Confirmation after repair: INSPECTION END