System Description

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM:

Intake door motor does not operate normally.
Intake door does not change.

Component Parts

Intake door control system components are:

A/C auto amp.
A/C and AV switch assembly
Intake door motor (PRB built into the intake door motor)
In-vehicle sensor
Ambient sensor
Optical sensor
Intake sensor

System Operation

The intake door control determines the intake door position based on the position of the recirculation switch. When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the opposite direction, again allowing fresh air into the cabin.

In the AUTO mode, the A/C auto amp. determines the intake door position based on the ambient temperature, the intake air temperature and the in-vehicle temperature. When the DEF, D/F, FOOT or OFF switches are pushed, the A/C auto amp. sets the intake door at the fresh position.

Fig 1: Intake Door Motor System Operation Diagram

Courtesy of NISSAN NORTH AMERICA, INC.

Intake Door Control Specification

Fig 2: Intake Door Control Air Recirculation Flow Chart

Courtesy of NISSAN NORTH AMERICA, INC.