B263D B263E, B263F, B2656 INTAKE DOOR MOTOR

AUTOMATIC AIR CONDITIONER

B263D B263E B263F B2656

Description

INTAKE DOOR MOTOR

The intake door motor (1) is installed to the blower unit.
The LCU (Local Control Unit) is installed to each door motor so as to perform the multiplex communication control (LAN) between each door motor of the mode door motor, air mix door motor and intake door motor in one communication line.
When each LCU receives the control signal (combination of the pulse wave with two type of amplitude) from the A/C auto amp., it moves each door to the appropriate position based on the door position detection signal of each PBR (Potentio Balance Resistor). When the movement was completed, each LCU transmits the signal that reports the movement completion to the A/C auto amp.

DTC DETECTION LOGIC

DTC	Items (CONSULT‐III screen terms)	Diagnostic item is detected when...	Possible cause
B263D	FRE DOOR FAIL	When the malfunctioning intake door position is detected at FRE position	Intake door motor A/C auto amp. Harness and connector (CAN communication line is open or shorted) (Intake door motor is open or shorted)
B263E	20P FRE DOOR FAIL	When the malfunctioning intake door position is detected at 20%FRE position
B263F	REC DOOR FAIL	When the malfunctioning intake door position is detected at REC position
B2656	BTC FRE DOOR FAIL	When the malfunctioning intake door position is detected

DTC CONFIRMATION PROCEDURE

1.PERFORM SELF-DIAGNOSIS

2.FUNCTION INSPECTION

1.CHECK BATTERY VOLTAGE OF INTAKE DOOR MOTOR

2.CHECK INTAKE DOOR MOTOR SIGNAL

3.CHECK INTAKE DOOR MOTOR GROUND CIRCUIT