Workshop Manual

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A–85
Compressor Control
In the automatic control mode, the automatic air
conditioner control unit turns on or off the compressor
with the evaporator anti-freeze mechanism using the
evaporation sensor. And, when outside air is detected to
be low through the outside air temperature sensor signal,
the control unit turns off the compressor using the
compressor control function.
Manual Control
 In the automatic control mode, pressing the A/C (air
conditioning) switch turns off the compressor.
 Pressing the DEF mode switch automatically turns on
the compressor.
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Heater Start-up Control
Heater start-up control occurs when the air discharge
mode is in the BI=LEVEL, FOOT, or DEF/FOOT position
and the heater core temperature is less than 14°C (58°F).
Air discharge volume remains in the AUTO LO mode until
the engine coolant temperature rises above 14°C (58°F).
The volume then increases in linear increments to the
pre-set level.
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Cooler Start-up Control
When cooler operation is started with the air discharge
mode is in the VENT or B/L position and the in-car
temperature higher than 26°C (78°F) (detected by the
in-car sensor), cooler start-up control occurs.
For the first 7 seconds of cooler operation, the fan
remains OFF. It then switches to AUTO LO. Air discharge
volume then increases in linear increments to the pre-set
level.
Cooler start-up control occurs the first time the engine is
started or the cooler switch is moved from OFF to AUTO.
It will not occur during subsequent switch movements.
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