Control By A/C Auto Amp.

LOW TEMPERATURE PROTECTION CONTROL 

When intake sensor detects that front evaporator fin temperature is 2.5°C (37°F) or less, A/C auto amp. requests ECM to turn the compressor OFF, and stops the compressor.

Fig 1: Front Automatic Air Conditioning System Compressor Control Graph

Courtesy of NISSAN NORTH AMERICA, INC.

When the front evaporator fin temperature returns to 4.0°C (39°F) or more, the compressor is activated.