DTC Description

DTC DETECTION LOGIC

DTC Description		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
C18F5	08	USM CAN Failure	1	Diagnosis condition	Electric motor switch ON Power supply voltage is normal
				Signal (terminal)	CAN communication signal
				Threshold	When a CAN communication signal is not continuously transmitted to the IPDM E/R.
				Diagnosis delay time	2 seconds or more
			2	Diagnosis condition	Electric motor switch ON Power supply voltage is normal
				Signal (terminal)	CAN communication signal
				Threshold	When a CAN communication signal is not continuously received from the IPDM E/R.
				Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

note	Confirm that the DTC is stored DTC or active DTC. If the DTC is active DTC, proceed to trouble diagnosis procedure. If the DTC is stored DTC, erase the DTC. Do not replace the ABS actuator and electric unit (control unit) if the DTC is stored DTC.

Stored DTC	Active DTC
CAN busline Electric driven intelligent brake unit IPDM E/R Harness or connector	CAN busline Electric driven intelligent brake unit IPDM E/R

FAIL-SAFE

Normal condition

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

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

2.CHECK DTC DETECTION

M.U.T.-III SE

Connect the all connectors.
Use the M.U.T.-III SE, then erase the DTC set in the "EBA".
Change the power supply mode of the electric motor switch to ON from OFF without depressing the brake pedal.
Use the M.U.T.-III SE, then check whether the DTC set in the "EBA".

Is DTC “C18F5-08” 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 HOW TO COPE WITH INTERMITTENT MALFUNCTIONS

.HOW TO COPE WITH INTERMITTENT MALFUNCTIONS

-2Confirmation after repair: INSPECTION END