Nissan Note [1618/1872] Air conditioning control

Nissan Note [1618/1872] Air conditioning control
EC-1618
[K9K]
ENGINE CONTROL SYSTEM
Air Conditioning Control
BBS004TN
AIR CONDITIONING CONTROL
The compressor is a variable displacement type.
The air conditioning relay is controlled by IPDM E/R.
COMPRESSOR OPERATION PROGRAMMING
During certain stages of operation, the ECM stops the compressor from functioning.
Engine Starting Program
The compressor is prevented from operating for 4 seconds after the engine has started.
Thermal Protection Program
The compressor is not engaged when the engine coolant temperature is higher than 115 °C(239°F) or from
110 °C(230°F) at high speed, 4500 rpm for more than 3 seconds.
Fan Motor Control Programming
At idling speed and also when driving, with the air conditioning activated, the speed of the fan motor is deter-
mined according to the refrigerant pressure and the vehicle speed.
Recovery of Performance
When pressure is applied to the accelerator pedal above 70%, the compressor is disengaged for 5 seconds.
Recovery of Output When The Vehicle Starts Moving
In order to help the vehicle move off, the air conditioning compressor is disengaged if the position of the accel-
erator pedal is above 35% and the idling speed less than 1250 rpm.
Anti-Stall Protection
The compressor is disengaged if the engine speed is lower than 750 rpm.
Engine Overspeed Timed Protection Program
The compressor is disengaged when the engine speed reaches 4500 rpm for more than 3 seconds.
NOTE:
The time between the compressor being disengaged twice is always greater than 10 seconds.
X. Engine speed in rpm Y. Engine coolant temperature in °C
MBIB1476E

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