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If the ON/OFF switch of the FATC is pressed for more than 5 seconds within 10 seconds after turning
the ignition key from the "OFF" position to the "ON" position, all the segments in LCD display comes on
for 3 seconds. 1.
The LCD display shows "2" and starts to check the sensor and actuator in the air conditioning system
automatically. 2.
3.
The self diagnosis ends when turning the ignition key from the "OFF" position to the "ON" position or
pressing the AUTO mode switch. 4.
Press for more
than 5 sec.
Segments comes on for 3 sec.
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4. MTC SYSTEM OPERATION PROCESS
1) Input/Output Factors
The MTC (Manual Temperature Control) system controls all the actuator and blower motor by the driver.
The heater and A/C control assembly with MTC has the dials and switches with the indicators so that the
driver can know the air conditioning system's operation.
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(2) Temperature control
The temp actuator controls the temperature of air discharged depending on the temperature control dial
operation by the driver. The driver can select one of the 17 levels.
Blower
stepBlower motor voltage
(V)
14.0
25.0
36.0
47.5
59.0
610.5
7 VIGN
(3) Blower control
The fan speed increments by 1 level per
revolution of the fan speed dial. (allowance:
Temperature control dial
Fan speed dial
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6810-00
(4) Air source control
When pressing the air source selection switch, the air source mode is changed via the intake actuator's
operation. The air source mode is switched between the fresh air and recirculation alternatively each
time the switch is pressed. You can see the air source mode through the switch's indicator. (the indicator
comes on at recirculation mode)
Control by vehicle speed
The air source selection is controlled in accordance with the vehicle speed while driving. Operating
conditions and control process are as follows:
When the PTC heater operates at fresh air mode in winter
When the vehicle speed is 45 km/h or lower in fresh air mode, the air source door is open 30% of its
maximum opening. If the vehicle speed is 65 km/h or more, then the air source door is completely
open. -
-
However, the electronic fan should be more than 7.5 V.
Air source selection switch
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(5) Air distribution control
The driver can select one of 5 air distribution modes using the 5 air distribution switches in the center of
the MTC The selected air distribution mode is changed by the mode actuator and acknowledged by the
indicator for each switch coming on
Vent mode
If the vent mode switch is pressed, the indicator comes on while the air flows to the
upper part of the body.
Bi-level mode
Foot mode
If the bi-level mode switch is pressed, the indicator comes on while the air flows to
the footwell and upper part of the body.
If the foot mode switch is pressed, the indicator comes on while the air flows to the
footwell.
Defroster mode switch
Bi-level mode switch Foot mode switchVent mode switch
Defroster & foot mode switch