DTC Description

DTC DETECTION LOGIC

DTC No.	Display Item(Trouble diagnosis content)	DTC detected condition
U1321-55	NOT CONFIGURATION	Diagnosis condition	When ignition switch ON
		Signal (terminal)	CAN communication signal
		Threshold	When parameter download is not complete.
		Diagnosis delay time	-

POSSIBLE CAUSE

NOTE:

Confirm if DTC is PAST or CRNT. If DTC is CRNT, proceed with Diagnosis Procedure. If DTC is PAST, clear the DTC. Do not replace the ABS actuator and electric unit (control unit) for a PAST DTC.

PAST DTC	CRNT DTC
-	ABS actuator and electric unit (control unit) ABS actuator and electric unit (control unit) is not parameter download

FAIL-SAFE

The following systems are suspended:

VDC function
TCS function
ABS function
Brake assist function
Hill start assist function
Brake force distribution function

DTC CONFIRMATION PROCEDURE

PRECONDITIONING
1. If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always place the ignition switch in the OFF position and wait at least 10 seconds before conducting the next test.
>>

GO TO 2.
CHECK DTC DETECTION
1. CONSULT
  1. Ignition switch OFF.
  2. Select "Self Diagnostic Result" mode of "ABS".
Is DTC "U1321-55" detected?

YES-1>>

"CRNT" is displayed: Proceed to Diagnosis Procedure .

YES-2>>

"PAST" is displayed: Inspection End (Erase "Self Diagnostic Result" mode of "ABS").

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident .

NO-2>>

Confirmation after repair: Inspection End.