DTC B1448: Passenger Side FACE Servo Motor Circuit [02/2019 - ]: Description

WARNING: This page is about a different variant/trim than selected.

The No. 3 air conditioning radiator damper servo sub-assembly (front passenger side mode) sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates the motor (normal or reverse) based on these signals to move the No. 3 air conditioning radiator damper servo sub-assembly (front passenger side mode) to the appropriate position, which controls the air outlet switching.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
B1448	Passenger Side FACE Servo Motor Circuit	Diagnosis condition: During No. 3 air conditioning radiator damper servo sub-assembly (front passenger side mode) operation Malfunction status: The damper servo operation request signal is output but the position information of the servo does not change or servo is malfunctioning Detection time: Continuously for 30 seconds or more	No. 3 air conditioning radiator damper servo sub-assembly (front passenger side mode) Air conditioning harness assembly Air conditioning amplifier assembly Air conditioning radiator assembly	Memorized

DTC DETECTION CONDITION COMBINATION TABLE

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	No. 3 air conditioning radiator damper servo sub-assembly (front passenger side mode) operating	◦	◦
Diagnosis Condition	No. 4 air conditioning radiator damper servo sub-assembly operating	◦	◦
Malfunction	Air outlet damper servo operation request signals are output but the air outlet damper position sensor value does not change	◦	-
Malfunction	Air outlet damper servo operation request signals are output but the air outlet damper position sensor value is abnormal	-	◦
Detection Time		Continuously for 30 seconds or more	Continuously for 30 seconds or more
Trip Count		1 trip	1 trip

HINT:

If the conditions of either of these patterns are detected, a DTC will be stored.