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
Diagnosis system (TCM)
CONSULT Function
FUNCTION
CONSULT can display each diagnostic item using the diagnostic test modes
shown following.
WORK SUPPORT MODE
Display Item List
Engine Brake Adjustment
CAUTION:
Mode of "+1""0""−1""−2""OFF" can be selected by touching "UP"or
"DOWN" on CONSULT screen ...
Automatic drive positioner control unit
Reference Value
TERMINAL LAYOUT
PHYSICAL VALUES
...
Front combination lamp
Disassembly and Assembly
EXPLODED VIEW
Front combination lamp
Xenon bulb
Plastic cover
Side marker lamp socket
Side marker lamp bulb
Front turn signal lamp socket
Front turn signal lamp bulb
Halogen bulb socket (high beam)
Halogen bulb (high beam)
HID control unit and ...