DTC Description

DTC DETECTION LOGIC

DTC No.	M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
U1CAE-02	Rear air mix door motor (Rear air mix door motor)	Diagnosis condition	When electric motor switch is ON
		Signal (Terminal)	LIN (door motor) signal
		Threshold	A/C amp. is not transmitting or receiving LIN communication with air mix door motor (rear)
		Diagnosis delay time	2 second or more

POSSIBLE CAUSE

Harness and connector [air mix door motor (rear) circuit is open or shorted to ground]
Air mix door motor (rear)
A/C amp.

FAIL-SAFE

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DTC CONFIRMATION PROCEDURE

1.PERFORM DIAGNOSTIC TROUBLE CODE

With M.U.T.-III SE

Change the power supply mode of the electric motor switch to ON (READY indicator: ON).
Select “Diagnostic Trouble Code” mode of “HVAC” using M.U.T.-III SE.
Check DTC.

Is DTC detected?

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

-2Confirmation after repair: INSPECTION END