DTC Description

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent malfunction detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control unit is connected with 2 communication lines (CAN-H and CAN-L) allowing a high rate of information transmission with less wiring. Each control unit communicates data but selectively reads required data only.

DTC DETECTION LOGIC

DTC		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detecting condition
U0155	00	LOST COMM (METER) Lost communication with instrument panel cluster (IPC) control module	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	A DTC is set if ECM cannot receive the CAN communication signals from combination meter for 2 seconds or more.
			Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors

(CAN communication line is open or shorted.)

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

1.PRECONDITIONING

If another “DTC CONFIRMATION PROCEDURE” is performed just before the next test, turn the ignition switch OFF and wait for 10 seconds or more, then perform the next test.

2.CHECK DTC DETECTION

With M.U.T.-III SE

Start the engine and wait for 2 seconds or more.
Check “Self Diagnostic Result” of “ENGINE”.

Is DTC U0155 detected?

Proceed to DTC Diagnosis Procedure

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

-2Confirmation after repair: INSPECTION END