System Diagram
System Description
The A/C auto amp. controls A/C compressor operation by ambient temperature, intake air temperature and signal from ECM.
SYSTEM OPERATION
When the A/C switch, the AUTO switch, or the DEF switch is pressed, or when shifting mode position to D/F, the A/C auto amp. transmits the A/C switch signal and blower fan motor switch signal to the ECM, via CAN communication.
ECM judges whether the A/C compressor can be turned ON, based on each sensor status (refrigerant-pressure sensor signal, throttle angle, etc.). If the ECM judges that the A/C compressor can be turned ON, it sends A/C compressor request signal to the IPDM E/R, via CAN communication.
Upon receipt of A/C compressor request signal from the ECM, the IPDM E/R turns the A/C relay ON to operate the A/C compressor.
When sending A/C compressor request signal to the IPDM E/R via CAN communication line, the ECM simultaneously sends A/C compressor feedback signal to A/C auto amp. via CAN communication line.
The ECM sends A/C compressor feedback signal to A/C auto amp., then, uses input A/C compressor feedback signal to control air inlet.
A/C compressor Protection Control
The ECM makes the A/C relay turn OFF and stops the A/C compressor when pressure on the high-pressure side, detected by the refrigerant pressure sensor, is over approximately 3,119 kPa (31.8 kg/cm2, 452 psi), or below approximately 118 kPa (1.2 kg/cm2, 17 psi).
Low Temperature Protection Control
Turn the A/C relay to OFF and stop the A/C compressor by the signal from the A/C auto amp., according to the evaporator passing air temperature detected by the intake sensor and the ambient temperature detected by the ambient sensor
NVIS (NISSAN vehicle immobilizer system-nats)
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
The NVIS (NATS) is an anti-theft system. By registering an
Intelligent Key ID into the vehicle, it prevents the
engine being started by an unregistered Intelligent Key. It has a higher
protection again ...
System malfunction
If the FEB system malfunctions, it will be turned
off automatically, a chime will sound, the FEB
warning light (orange) will illuminate and the
warning message [Malfunction] will appear in the
vehicle information display.
Action to take
If the warning light (orange) comes on, stop the
vehicle ...
Intelligent key
Description
The following functions are available when having and carrying the
Intelligent Key.
Door lock/unlock
Trunk open
Remote control entry function and panic alarm function are available when
operating the remote buttons.
Component Function Check
NOTE:
The Signal Tech II To ...