B2578, B2579 In-Vehicle Sensor: Description

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

In-vehicle Sensor

The in-vehicle sensor (1) is located on instrument lower cover (LH).
It converts variations in compartment air temperature drawn from the aspirator into a resistance value. It is then input into the A/C auto amp.

Fig 1: Identifying In-Vehicle Sensor

Courtesy of NISSAN MOTOR CO., U.S.A.

In-vehicle Sensor Circuit

Fig 2: In-Vehicle Sensor Circuit

Courtesy of NISSAN MOTOR CO., U.S.A.

Aspirator

The aspirator (1) is located on driver side of heater & cooling unit assembly. It produces vacuum pressure due to air discharged from the heater & cooling unit assembly, continuously taking compartment air in the aspirator.

Fig 3: Identifying Aspirator

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: Identifying Aspirator And Heater & Cooling Unit Assembly

Courtesy of NISSAN MOTOR CO., U.S.A.