TIBURON(GK) >2007 > G 2.7 DOHC > Heating,Ventilation, Air Conditioning > Controller > Manual Controller>Troubleshooting | ![]() ![]() |
POWER SUPPLY CHECK
In turning off IGN,
battery supplies power for ordinary power, FATC connector A-3 through
battery fuse. FATC performs memory function by means of battery power
supplied as described above. In turning on IGN, alternator is driven. At
this time, IG2 power generated in alternator FATC connector A-12 and A-25
terminal through IG1 fuse and air conditioner fuse (10A). FAT carried out
actual system operation by means of IG2 power supplied as described
above.
ERROR DIAGNOSTICS
BACK LIGHT AND REAR GLASS HEAT RAYS
CHECK
In turning on IG and
then light switch, battery power is supplied for FATC connector A-2
terminal through wiring. The supplied power passes connector A-1 terminal
through light bulb in FATC and flows into reostart as shown in the above
figure. The brightness is adjusted according to resistance value of
reostart.
ERROR DIAGNOSTICS
BLOWER CHECK
Perform the blower check
in manual blower running state because it is difficult to check blower at
automatic control. Blower is controlled from level l to level 7 equally as
in button operation and running logic. In turning on IG, blower relay is
ON and voltage of 0.1 to 1.4V is transferred from FATC connector A-4
terminal to base source of power TR according to FATC control (selectable
from level 1 to level 7). At this time, voltage of blower motor's both
ends is determined according to collector voltage of FATC connector A-5
terminal. If FATC is controlled in level 7, GND(0V) is supplied for FATC
connectorA-18 terminal and high blower relay is driven.
ERROR DIAGNOSTICS
AIR CONDITIONER CHECK
11V is outputted from
connector A-17 terminal in turning on INSULATING and pressing air
conditioner switch. However, although 11V is outputted from FATC connector
A-17 terminal, compressor clutch isn't driven. Wind of air conditioner is
discharged if only compressor clutch works. Output signal from air
conditioner is inputted in engine computer through triple switch. Then,
the engine computer considers several conditions and when output of air
conditioneris judged to be practical, it gives GND to signal terminal of
air conditioner relay. Accordingly, relay of air conditioner is ON and
compressor clutch works. Triple switch checks pressure of refrigerant
flowing through pipe and turnson/off switches in it according to standard.
So, it controls that output signalof air conditioner outputted from FATC
is inputted into engine computer, and also speed of condenser fan
according to pressure level. (For high pressure, high-speed and for low
pressure, low-speed.
ERROR DIAGNOSTICS
INTAKE AND AQS CHECK
In turning on IG and
selecting outdoor mode with indoor switch, 12V is outputted from FATC
connector A-23 terminal, 0V is supplied for A-10 terminaland motor works
in direction of outdoor. In selecting indoor mode with indoorswitch, 12V
is outputted from FATC connector A-10 terminal, 0V is supplied for A-23
terminal and motor works in direction of indoor.
ERROR DIAGNOSTICS
MODE CHECK
In turning on IG and
selecting mode switch, sequential operation begins in order of Vent →
Bi-level → Blower → Mix. DIP mode works regardless of order at selecting
it. In selecting Vent mode as mode switch, GND(0V) is supplied for FATC
connector A-14(Vent) terminal. Voltage of 9V and more is set in the rest
terminal A-15(DEF) and motor drive IG in mode actuator which receives the
signal, works in direction of vent mode setup. Vent, Built-in-level,
Blower, Mix and Defrost mode can be selected in themethod described
above.
ERROR DIAGNOSTICS
TEMP CHECK
In adjusting temp switch
from 32°C to 17°C, 11V is outputted from FATC connector A-9 terminal, 0V
is supplied for A-22 terminal and temp motor works in direction of COOL.
In adjusting temp switch from 17°C to 32°C, 11V is outputted from FATC
connector A-22 terminal, 0V is supplied for A-9 terminal and temp motor
works in direction of WARM. When temp actuator has to move to a certain
location for its automatic control, temp feedback signal terminal moves
equally in temp actuator and informs controller of location of temp
actuator through FATC connector B-10 terminal. Comparing original value
with inputted value, it works until they are same. If 4.9V and more is
inputted in B-10 terminal, it is regarded as disconnection. If 0.1V and
less is inputted in B-10 terminal, it is regarded as short-circuit. In the
case of disconnection or short-circuit as a result of self-diagnostic,
substitute control is carried out as follows.
ERROR DIAGNOSTICS
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