THERMO Control Amp.

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Run engine and operate A/C system.
Connect voltmeter from harness side.
Check thermo control amp. operation shown in the table.

Fig 1: Thermo Control Amp Operation Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Thermo Control Amp Operation
Courtesy of NISSAN MOTOR CO., U.S.A.