DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H line, CAN‐L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. CAN Communication Signal Chart. Refer to CAN Communication Signal Chart

DTC DETECTION LOGIC

DTC No.	M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
U2A04-88	Comm Bus Off ITS1-FD (Communication Bus Off Intelligent Transport System1-FD)	Diagnosis condition	When electric motor switch is ON
		Signal (terminal)	CAN communication signal
		Threshold	Around view monitor control unit cannot communicate CAN communication signal
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Camera image is not displayed.
MOD function does not operate.

CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

With M.U.T.-III SE

Turn the electric motor switch ON.
Turn the electric motor switch OFF and wait for at least 30 seconds.
Turn the electric motor switch ON and wait at least 1 minute or more.
Select "Diagnostic Trouble Code" mode of “Multi Around Monitor” using M.U.T.-III SE.
Check DTC.

Is DTC U2A04-88 detected?

Proceed to Diagnosis Procedure

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

-2Confirmation after repair: INSPECTION END