hvac SUBARU TRIBECA 2009 1.G Service Owner's Manual

AC-22
Refrigerant Charging Procedure
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
7) Note the low-pressure gauge reading.
8) Leave it at least 5 minutes, and then check the
low-pressure gauge reading for any changes.
If the gauge indicator shows near zero point, it is a
sign of leakage. Check pipe connector points, re-
pair them, and make sure there is no leakage.
9) Follow the can tap operation manual, install to
the refrigerant can.
10) Disconnect the center manifold hose from the
vacuum pump, and connect the hose to the tap
valve.
11) When a 13.6 kg (30 lb) refrigerant container is
used, measure the weight of the refrigerant amount
to use using a scale.
12) Confirm that all the 3 hoses are connected se-
curely to the manifold gauge set.
13) Open the valve on the HFC-134a source.
14) Loosen the center hose connection on the
manifold gauge set (if applicable, press a purge
valve on the manifold gauge set) for a few seconds
to allow the air in the center hose to escape by the
refrigerant pressure.
15) Stop the engine and carefully open the high-
pressure valve.
CAUTION:
Do not open the low-pressure valve.
CAUTION:
Never run the engine while charging from the
high-pressure side.
16) Close the high-pressure valve when the low-
pressure gauge reaches 98 kPa (1 kg/cm2, 14 psi).
Using a leak tester, check the system for leaks.
If any leakage is found after the refrigerant recov-
ery is completed, repair the applicable area.
(A) Tap valve
(B) Center manifold hose
(A) Refrigerant container (HFC-134a)
(B) Scale
AC-00027
AC-00028
(A)
(B)
AC-00029
(A)
(B)
(A) Low-pressure gauge (Compound pressure
gauge)
(B) High-pressure gauge
(C) Close
(A) Low-pressure gauge (Compound pressure
gauge)
(B) High-pressure gauge
(C) Close
(D) Ignition switch OFF
(E) Slowly open
AC-00030
(A) (B)
(C)(C)
AC-00031
(A) (B)
(E)
(D)
(C)

AC-23
Refrigerant Charging Procedure
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
17) After confirming that there are no leaks with the
leak test, charge the required amount of refrigerant.
CAUTION:
Never run the engine while charging from the
high-pressure side.
18) Close the high-pressure valve when;
•the readings of low- / high-pressure gauges be-
come almost equal, after the charging speed is re-
duced,
•the HFC-134a source becomes empty, or the
system is full with the gas.
19) If the HFC-134a source is empty, close the
high-pressure valve, close the valve on the can tap,
and replace the HFC-134a source with a new one
to restart the operation.
20) Confirm that both the low- / high-pressure
valves can be closed. Start the engine with the A/C
switch OFF.
21) Quickly repeat ON-OFF cycles a few times to
prevent initial compressor damage.
22) Set up the vehicle as follows:
•A/C switch ON
•Engine running at 1,500 rpm
•Blower setting speed “HI”, (For models with rear
coolers, also turn the rear cooler fan switch to “HI”)
•Temperature setting to “MAX COOL”
•Air inlet setting to “RECIRC”
•Window open
23) While reading the low-pressure gauge, careful-
ly open the low-pressure valve with the refrigerant
source connected and the service hose purged.
CAUTION:
Never open the high-pressure valve with the en-
gine running. The high-pressure gas will back-
flow resulting in an explosion of the can.
24) Adjust the refrigerant flow to maintain the pres-
sure on the low-pressure side at 276 kPa (2.81 kg/
cm2, 40 psi) max.
25) After the system is fully charged, close the low-
pressure valve.
26) Close the valve on the refrigerant source.
27) Disconnect the hose from the service port, and
install the service port cap.
(A) Low-pressure gauge (Compound pressure
gauge)
(B) High-pressure gauge
(C) Close
AC-00032
AC-00033
(A) (B)
(C)(C)
Refrigerant amount
Refrigerant Minimum Maximum
HFC-134a 840 g (1.85 lb) 900 g (1.98 lb)
AC-00034

AC-24
Refrigerant Leak Check
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
5. Refrigerant Leak Check
A: INSPECTION
1) At engine speed below 1500rpm, operate the A/
C system for approx. 10 minutes, and confirm that
the high-side pressure shows at least 690 kPa
(7.03 kg/cm2, 100 psi). Then stop the engine to
start the leak test.
2) Starting from the connection between high-pres-
sure pipe and evaporator, check the system for
leaks along the high-pressure side through the
compressor. The following items must be checked
thoroughly.
3) Check the joint and seam between pressure
switch (dual switch) and high-pressure pipe.
4) Check the connections between condenser and
pipes, and welded joints on the condenser.
The leak tester may detect the oil on the condenser
fins as a leak.
5) Check the joint between compressor and hoses.
6) Check the machined area of the compressor and
other joints on the compressor.
7) Check the compressor shaft seal at the area
near the center of compressor clutch pulley.
Some shaft seals show a slight amount of leakage,
about 3 g (0.1 oz) per year. This is not a problem.
8) Starting from the connection between low-pres-
sure pipe and evaporator, check the system for
leakage along the low-pressure side through the
compressor. The following items must be checked
thoroughly.
•Connection between 2 parts
•Connection between pipe and plate
•Connection between pipes
9) Visually check the rubber area of the flexible
hose for cracks.
Check the entire length of the flexible hose, espe-
cially the connection with the metal hose end.
CAUTION:
Carefully check the external surface of hoses
and tubes at approx. 25 mm (0.98 in) per sec-
ond.
10) Disconnect the drain hose from the heater
case, and check the hose end for at least 10 sec-
onds.
After the test is finished, reconnect the drain hose.
11) Turn the ignition key to the ON position, and
run the blower at high speed for approx. 1 minute.
Stop the blower to check the ventilation grill on the
instrument panel. While moving the tester closer to
the grill, run the blower for 1 or 2 seconds, then stop
it. Check the grill at that point for at least 10 sec-
onds.
12) Check the valve in the service port.
13) Visually check the rubber seal in the service
port cap.
AC-00035
(A) Flexible hose
AC-00036
(A)
AC-00037
AC-00038

AC-25
Compressor Oil
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
6. Compressor Oil
A: PROCEDURE
NOTE:
Before making repairs, perform the oil return oper-
ation to return the compressor oil in circulation with
the refrigerant to the compressor.
1) Increase the engine to 1,500 rpm.
2) Turn on the A/C switch.
3) Turn the temperature control switch to MAX
COOL.
4) Put in RECIRC position.
5) Turn the blower control switch to HI. (For models
with rear coolers, also turn the rear cooler fan
switch to HI)
6) Leave in this condition for 10 minutes.
B: REPLACEMENT
NOTE:
•If a component has been replaced, add an ap-
propriate amount of compressor oil (same as the
amount of remaining oil in removed component).
•When replacing the compressor, the new com-
pressor will already have the specified amount of
oil in it. Install the new compressor after removing
the same amount of oil that is remaining in the com-
pressor removed.

AC-26
Blower Motor Unit Assembly
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
7. Blower Motor Unit Assembly
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the glove box. AL, Glove Box.>
3) Disconnect the connectors of the A/C control
module, intake door actuator, blower motor, power
transistor and blower resistor.
4) Lift the floor mat.
5) Loosen the bolt and nut to remove blower motor
unit assembly.
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
Refer to “COMPONENT” of “General Descrip-
tion”. UNIT, COMPONENT, General Description.>
PONENT, General Description.>
AC-01276

AC-27
Blower Motor
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
8. Blower Motor
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the glove box lower cover. 37, REMOVAL, Glove Box.>
3) Disconnect the connector of the blower motor.
4) Loosen the screw to remove the blower motor.
B: INSTALLATION
Install in the reverse order of removal.
C: INSPECTION
Connect the battery positive (+) terminal to terminal
No. 2 of the blower motor connector, and the neg-
ative (–) terminal to terminal No. 1. Check the blow-
er motor for smooth rotation.
AC-01277
AC-01278
12

AC-28
Power Transistor (Auto A/C Model)
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
9. Power Transistor (Auto A/C
Model)
A: REMOVAL
1) Remove the glove box lower cover on passen-
ger side.
2) Disconnect the power transistor connector.
3) Remove the two screws and remove the power
transistor.
B: INSTALLATION
Install in the reverse order of removal.
AC-01279

AC-29
Blower Resistor (Dual A/C Model)
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
10.Blower Resistor (Dual A/C
Model)
A: REMOVAL
1) Remove the quarter trim. MOVAL, Rear Quarter Trim.>
2) Disconnect the blower resistor connector.
3) Remove the lock (A) and rotate to the right, and
remove the blower resistor.
B: INSTALLATION
Install in the reverse order of removal.
C: INSPECTION
Measure the blower resistor resistance.
If NG, replace the blower resistor.
Te r m i n a l N o . S t a n d a r d
1 and 3 Approximately 0.42Ω
1 and 2 Approximately 1.42 Ω
4 and 1 Approximately 3.2 Ω
AC-01321
(A)
AC-01322(4)(3)
(1)(2)

AC-30
Heater Core
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
11.Heater Core
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Draw out the refrigerant with the refrigerant re-
covery unit erant Recovery Procedure.>
3) Remove the heater and cooling unit. AC-35, REMOVAL, Heater and Cooling Unit.>
4) Remove the screws and remove the heater core
cover and pipe clamp.
5) Remove the heater core (A).
B: INSTALLATION
Install in the reverse order of removal.
AC-01133
AC-01134(A)

AC-31
Control Panel
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
12.Control Panel
A: REMOVAL
1. FRONT
1) Disconnect the ground cable from battery.
2) Remove the front console panel. REMOVAL, Audio.>
3) Remove the instrument panel ornament and the
drivers side and passengers side inner panels.
4) Remove the screws, and pull out the control
panel.
5) Disconnect the harness connectors and remove
the front control panel.
2. REAR
1) Disconnect the ground cable from battery.
2) Pull out the storage box from underneath the
rear control panel.
3) Push out the panel from the back side.
4) Detach the connectors and remove the rear con-
trol panel.
B: INSTALLATION
Install in the reverse order of removal.
ET-00174
ET-00172