Owner's Manual

MTC-52
TROUBLE DIAGNOSIS
Revision: March 2005 2005 Altima
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
● Front air control
● Intake door motor
System Operation
The intake door control determines intake door position based on the ambient temperature, the intake air tem-
perature and the in-vehicle temperature. When the front air control is set to DEFROST, or OFF, the front air
control sets the intake door at the fresh position.
COMPONENT DESCRIPTION
Intake door motor
The intake door motor is attached to the intake unit. It rotates so that
air is drawn from inlets set by the front air control. Motor rotation is
conveyed to a lever which activates the intake door. Door position is
then fed back to the front air control by PBR built-in air mix door
motor.
DIAGNOSTIC PROCEDURE
SYMPTOM: Intake door motor does not operate normally.
Perform diagnostic procedure for LAN system circuit. Refer to MTC-44, "
LAN System Circuit" .
WJIA0924E
WJIA0047E