SUBARU TRIBECA 2009 1.G Service Workshop Manual

AC-45
In-vehicle Sensor (Auto A/C Model)
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
24.In-vehicle Sensor (Auto A/C
Model)
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the instrument panel lower panel on
driver’s side. <Ref. to EI-36, REMOVAL, Instru-
ment Panel Lower Cover.>
3) Disconnect the connector and aspirator hose,
remove the catch hook and remove the interior
temperature sensor from the knee guard plate.
CAUTION:
Be careful not to damage the sensors and inte-
rior trim when removing.
B: INSTALLATION
Install in the reverse order of removal.
C: INSPECTION
<Ref. to AC(diag)-33, IN-VEHICLE SENSOR, Di-
agnostic Procedure for Sensors.>

AC-46
Air Vent Grille
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
25.Air Vent Grille
A: REMOVAL
1. UPPER GRILL
1) Disconnect the ground cable from battery.
2) Lift the upper grill, and remove the catch on the
hazard switch side.
3) Hold the side of the monitor and remove the
catch on the upper, right and left sides.
4) Detach the connectors and remove the panel.
2. CENTER GRILLE
1) Disconnect the ground cable from battery.
2) Remove the front control panel. <Ref. to AC-31,
FRONT, REMOVAL, Control Panel.>
3) Remove the screw, and remove the center grill
3. SIDE GRILLE
Remove the catch in 2 locations to remove the side
air vent grill.
4. ROOF GRILL
Remove the catch, and remove the roof air vent
grill.
B: INSTALLATION
Install in the reverse order of removal.
C: INSPECTION
1) Check that the direction and amount of air can
be adjusted smoothly.
2) Check that the adjustment can be maintained in
each position.
AC-01345
AC-01346
AC-01347
AC-01309
AC-001354

AC-47
Heater Duct
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
26.Heater Duct
A: REMOVAL
1. FRONT HEATER DUCT
1) Remove the instrument panel lower cover. <Ref.
to EI-36, REMOVAL, Instrument Panel Lower Cov-
er.>
2) Remove the catch and detach the front heater
duct (A).
2. REAR HEATER DUCT
1) Remove the heater cooling unit. <Ref. to AC-35,
REMOVAL, Heater and Cooling Unit.>
2) Remove the front seats. <Ref. to SE-7, REMOV-
AL, Front Seat.>
3) Remove the front side sill cover.
4) Pull off the floor mat to remove the rear center
heater duct (A) and rear heater duct LH, RH (B).
B: INSTALLATION
Install in the reverse order of removal.
AC-01349
(A)
AC-01350
(A)
(B)

AC-48
Heater Vent Duct
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
27.Heater Vent Duct
A: REMOVAL
1. INSTRUMENT
1) Remove the instrument panel. <Ref. to EI-36,
REMOVAL, Instrument Panel Lower Cover.>
2) Remove the screws and detach the center vent
duct (A).
3) Remove the screws and detach the side vent
duct (B).
4) Remove the screws and detach the side defrost-
er duct (C).
2. ROOF DUCT
Remove the roof trim. <Ref. to EI-50, REMOVAL,
Roof Trim.>
NOTE:
The roof duct is one piece with the roof trim. If it re-
quires replacement, replace the roof trim.
B: INSTALLATION
Install in the reverse order of removal.
AC-01352
(C)(B)
(C)
(A)

AC-49
A/C Filter
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
28.A/C Filter
A: REPLACEMENT
1) Remove the instrument panel lower cover. <Ref.
to EI-37, REMOVAL, Glove Box.>
2) Remove the 2 clips and the damper (string)
3) Remove the glove box.
4) Remove the service hole cover.
5) Remove the A/C filter.
6) Install in the reverse order of removal.
(1) Clip
(2) Damper (String)
AC-01382(1)
(2)
AC-01383
AC-01384

AC-50
General Diagnostic Table
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
29.General Diagnostic Table
A: INSPECTION
Symptom Repair order
Blower motor
Does not operate.
Fuse
Blower motor relay
Blower motor
Blower motor resistor
Blower switch
Wiring harness
Strange noiseBlower motor
Air conditioner filter
Compressor
Does not operate.
Refrigerant
Fuse
Air conditioning relay
Magnet clutch
Compressor
Pressure switch
A/C switch
Blower switch
Wiring harness
Strange noise
V- b e l t
Magnet clutch
Compressor
Belt tensioner
Cold air not emitted.
Refrigerant
V- b e l t
Magnet clutch
Compressor
Pressure switch
Expansion valve
A/C switch
Blower switch
Wiring harness
Heater duct
Heater vent duct
Te m p e r a t u r e c o n t r o l d o o r a c t u a t o r
Wa r m a ir n ot e mi t te d .
Engine coolant
Blower switch
Heater core
Te m p e r a t u r e c o n t r o l d o o r a c t u a t o r
Te m p e r a t u r e o f a i r f r o m v e n t s d o e s n o t c h a n g e .
Engine coolant
Air mix door actuator (Auto A/C)
Wire harness (Auto A/C)
Unable to switch blow vents.
Mode door actuator
Air flow switch
Wiring harness
Unable to switch suction vents.
Air inlet select switch
FRESH/RECIRC door actuator
Wiring harness

AC-51
General Diagnostic Table
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
Air does not come out of the rear A/C.
Rear cooler blower
Rear cooler blower resistor
Rear cooler switch
Wiring harness
Air does not come out of the rear A/C.
Air conditioner switch
Compressor
Rear cooler switch
Rear cooler expansion valve
Symptom Repair order

AC-52
General Diagnostic Table
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)

AC(diag)-2
Basic Diagnostic Procedure
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
1. Basic Diagnostic Procedure
A: PROCEDURE
Step Check Yes No
1START INSPECTIONS.
1) Perform the pre-inspection. <Ref. to
AC(diag)-3, INSPECTION, General Descrip-
tion.>
2) Perform the self-diagnosis. <Ref. to
AC(diag)-10, OPERATION, Diagnostic Char t
for Self-diagnosis.>
Does the self-diagnosis oper-
ate?
Go to step 2.<Ref. to AC(diag)-
15, A/C OR SELF-
DIAGNOSIS SYS-
TEMS DOES NOT
OPERATE, Diag-
nostics for A/C
System Malfunc-
tion.>
2IDENTIFY MALFUNCTION PART.
Identify the malfunction part with self-diagno-
sis.
Can the malfunction part be
confirmed?
Repair the mal-
function part in
accordance with
each diagnostic
chart.
Go to step 3.
3CHECK COMPARTMENT TEMPERATURE.
1) Turn on the A/C switch.
2) Turn the temperature control dial at maxi-
mum cool position.
3) Check the compartment temperature
change.
Does the compartment tem-
perature change?
Go to step 4.<Ref. to AC(diag)-
20, COMPART-
MENT TEMPERA-
TURE DOES NOT
CHANGE, OR A/C
SYSTEM DOES
NOT RESPOND
PROMPTLY.,
Diagnostics for A/
C System Mal-
function.>
4CHECK A/C SYSTEM RESPONSE.
Change the temperature setting, and check the
response of A/C system.
Does the A/C system respond
quickly?
A/C system is nor-
mal.
<Ref. to AC(diag)-
20, COMPART-
MENT TEMPERA-
TURE DOES NOT
CHANGE, OR A/C
SYSTEM DOES
NOT RESPOND
PROMPTLY.,
Diagnostics for A/
C System Mal-
function.>

AC(diag)-3
General Description
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
2. General Description
A: CAUTION
1) Never connect the battery in reverse polarity.
•Auto A/C control module may be destroyed in-
stantly.
2) Do not disconnect the battery terminals while the
engine is running.
•A large counter electromotive force will be gener-
ated in the generator, and this voltage may damage
electronic parts such as auto A/C control module
etc.
3) Before disconnecting the connectors of each
sensor and the auto A/C control module, be sure to
turn the ignition switch to OFF.
•Auto A/C control module may be damaged.
4) Every A/C-related part is a precision part. Do not
drop them.
5) Airbag system wiring harness is routed near the
A/C control panel and junction box.
CAUTION:
•For airbag system, yellow-colored wiring har-
ness and connectors are all used. Do not use
the electrical test equipment on these circuits.
•Be careful not to damage the airbag system
wiring harness when servicing the A/C control
panel and junction box.
B: INSPECTION
Before performing the diagnosis, check the follow-
ing items which might affect A/C system problems.
1. BATTERY
1) Measure the battery voltage and specific gravity
of electrolyte.
Standard voltage: 12 V
Specific gravity: 1.260 or more
2) Check the condition of the fuses for A/C system
power supply and other fuses.
3) Check the condition of harness and harness
connector connections.
2. ASPIRATOR HOSE
1) Turn the ignition switch to ON, and press the A/
C switch.
2) Turn the temperature control dial to maximum
hot position.
3) Turn the air flow control dial to “DEF” position.
4) Turn the fan speed control dial to 4th position.
5) Put a strip of paper close to the front side of in-
vehicle sensor suction port (A) located in the driv-
er’s side console side panel, and check that air is
being sucked into the port by seeing the paper
moving towards the port.
NOTE:
Be careful not to let the paper get sucked into the
port.
6) If the paper does not move at all, remove the
driver’s side console side panel <Ref. to EI-39, RE-
MOVAL, Center Console.> and check for improper
connection of the aspirator hose, in-vehicle sensor
and heater unit, and repair them if necessary.
3. A/C LINE
Check the connection for A/C line (A) and lower
side high-pressure pipe.
AC-01323
AC-01324
(A)