DTC Description

DTC DETECTION LOGIC

DTC Description		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
U225B	87	Lost Communication with USM on CAN CH2	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 if DTC is PAST or CRNT. If DTC is CRNT, proceed with Diagnosis Procedure. If DTC is PAST, clear DTC. Do not replace the ABS actuator and electric unit (control unit) for a PAST DTC.

Stored DTC	Active DTC
CAN busline Harness or connector	CAN busline

FAIL-SAFE

Normal condition

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If other “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn the electric motor switch 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 “U225B-87” detected?

INSPECTION END