engine coolant SUBARU TRIBECA 2009 1.G Service Workshop Manual

AC-35
Heater and Cooling Unit
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
16.Heater and Cooling Unit
A: REMOVAL
1. FRONT
1) Disconnect the ground cable from battery.
2) Using the refrigerant recovery system, dis-
charge refrigerant. <Ref. to AC-20, PROCEDURE,
Refrigerant Recovery Procedure.>
3) Drain engine coolant from the radiator.
4) Remove the bolts securing expansion valve and
pipe in engine compartment. Release the heater
hose clamps in engine compartment to remove the
hoses.
5) Remove the instrument panel. <Ref. to EI-40,
REMOVAL, Instrument Panel Assembly.>
6) Remove the support beam.
7) Remove the blower motor unit assembly. <Ref.
to AC-26, REMOVAL, Blower Motor Unit Assem-
bly.>
8) Disconnect the actuator connector.
9) Remove the bolt and nuts and remove the heat-
er and cooling unit.
2. REAR
1) Disconnect the ground cable from battery.
2) Using the refrigerant recovery system, dis-
charge the refrigerant. <Ref. to AC-20, PROCE-
DURE, Refrigerant Recovery Procedure.>
3) Remove the quarter trim. <Ref. to EI-45, RE-
MOVAL, Rear Quarter Trim.>
4) Remove the bolts, then disconnect the rear tube.
5) Disconnect the harness connector.
6) Remove the nuts, then remove the cooler unit.
B: INSTALLATION
1) Install in the reverse order of removal.
2) Charge refrigerant. <Ref. to AC-21, PROCE-
DURE, Refrigerant Charging Procedure.>
Tightening torque:
Refer to “COMPONENT” of “General Descrip-
tion”. <Ref. to AC-6, HEATER COOLING
UNIT, COMPONENT, General Description.>
AC-01294
AC-01295

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(diag)-14
Diagnostic Chart for Self-diagnosis
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
4. SENSOR CHECK TABLE
NOTE:
When the sunload sensor check is performed indoors or in the shade, it could be diagnosed as having an
open circuit. Always check the sunload sensor with the sun shining on it.
*1: “AUTO” display does not blink when past malfunction occurred. Past malfunction means that abnormal signals were contin-
uously input for a certain time in the past.
*2: Present malfunction only is displayed for sunload sensor open circuit.
5. OPERATING MODE TABLE
*Same opening angle for both driver’s and passenger’s side
Display screen (Malfunction at
present) *1Sensor Trouble contents
21/AUTO BlinkIn-vehicle sensorOpen
–21/AUTO BlinkShort
22/AUTO Blink Ambient sensor Sensor trouble or communication malfunction
23/AUTO BlinkEvaporator sensorOpen
–23/AUTO BlinkShort
24/AUTO Blink Engine coolant temperature sensor Sensor trouble or communication malfunction
25 BlinkSunload sensorOpen *2
–25/AUTO BlinkShort
26/AUTO BlinkDriver's side air mix door actuator
potentiometer
COOL
27/AUTO BlinkHOT
–26/AUTO BlinkPassenger’s side air mix door actua-
tor potentiometer
COOL
–27/AUTO BlinkHOT
28/AUTO BlinkMode door actuator potentiometerFA C E
29/AUTO BlinkDEF
41/AUTO BlinkSeat heater thermistor (Driver’s
side)
Open
–41/AUTO BlinkShort
42/AUTO BlinkSeat heater thermistor (Passenger’s
side)
Open
–42/AUTO BlinkShort
20 Blink When all conditions are normal
Display screenFRESH/RECIRC
doorMode door Air mix door* Blower fanA/C compressor (Mag-
net clutch)
31 FRESH FACE Maximum cool LO OFF
32 RECIRC FACE Maximum cool LO ON
33 RECIRC FACE Maximum cool M1 ON
34 FRESH B/L 50% M1 ON
35 FRESH HEAT 50% M1 ON
36 FRESH HEAT Maximum hot M3 ON
37 FRESH D/H Maximum hot M3 ON
38 FRESH DEF Maximum hot HI ON

IDI-2
General Description
INSTRUMENTATION/DRIVER INFO
1. General Description
A: SPECIFICATION
Combination meter
SpeedometerStepping motor typeTa c h o m e t e r
Malfunction indicator light
LED
Oil pressure warning light
ABS warning light
Airbag warning light
Seat belt warning light
Brake fluid and parking brake warning light
Low fuel warning light
Charge warning light
AT F t e m p e r a t u r e w a r n i n g l i g h t
AW D war n in g l i gh t
Tire pressure warning light
Low washer fluid warning light
Rear differential oil temperature warning light
Ve h i c l e d y n a m i c s c o n t r o l ( V D C ) w a r n i n g l i g h t
Ve h i c l e d y n a m i c s c o n t r o l ( V D C ) i n d i c a t o r l i g h t
Tu r n s i g n a l i n d i c a t o r l i g h t
HI-beam indicator light
Cruise indicator light
Cruise set indicator light
Fr o nt fog li g ht i nd i ca to r li g ht
SPORT indicator light
Light illumination indicator light
Meter illumination light
LCD back light
Engine coolant temperature gauge
LCDFuel gauge
AT s e l e c t l e v e r p o s i t i o n i n d i c a t o r l a m p , s p o r t s s h i f t i n d i c a t o r
Odo/Trip indicator
Wa r ni n g b ox
Door open warning light
LEDSecurity indicator
Passenger’s seat airbag indicator
Passenger’s seat belt war ning light

IDI-5
Combination Meter System
INSTRUMENTATION/DRIVER INFO
2. LIST OF SELF-DIAGNOSIS MODE OPERATION
Speedometer,
tachometer, fuel
gauge, engine
coolant temper-
ature gauge
Microcomputer
running type
warning light,
indicator light
AT s e l e c t l e v e r
position indica-
tor light
Odo/Trip indica-
tor
SPORT shift
indicator
Illumination
(indicator nee-
dle, plate, ring,
LCD)
Buzzer (SPORT
shift buzzer)
Step 0. Processing to self-diagnosis function
Operating initial
operation
Initial illuminat-
ing
Normal Normal Initial illuminat-
ing
Initial illuminat-
ing
Not beep.
Step 1-1. Check each indication after initial operation
Repeat the
sweep opera-
tion (After hold-
ing on lowest
position for one
second, reaches
to highest posi-
tion within 5
seconds, and
after holding on
highest position
for one second,
reaches to low-
est position
within 5 sec-
onds).
Light ON With the high-
est brightness,
illuminate the
position sequen-
tially at a cycle
of 1. 5 seconds.
For the illumina-
tion order, refer
to the illumina-
tion order table.
Pe r for m t he s eg -
ment check. For
the illumination
order, refer to
the illumination
order table.
Pe rfo r m t h e se g -
ment check. For
the illumination
order, refer to
the illumination
order table.
Light at the
highest bright-
ness.
Not beep.
Step 1-2. Press the trip knob (trip knob input is not accepted till the meter indicator needle reaches the highest position): sweep
complete, AT select lever position indicator display is set
After complet-
ing sweep in
step 1-1, back to
lowest position.
Light ON Keep the posi-
tion indicated
when the trip
knob is pressed.
Underbar “ _ ” is
displayed.
“1” is displayed. Light at the
highest bright-
ness.
Not beep.
Step 2-1. Press the trip knob, and hold it: Check each meter
All meters are
moved simulta-
neously in every
0.5 sec. from
the lowest posi-
tion to highest
position.
Speedometer/
Ta c h o m e t e r :
Approx. 5
degrees at
ever y move-
ment.
Wa t er t e mp er a-
ture /Fuel
gauge: Moves 1
segment at a
time.
Light OFF Keep the posi-
tion indicated
that set in step
1-2.
Display the cur-
rent meter
directing angle
on odometer.
Ex.) Displays
135017 when
Speedometer/
Ta c h o m e t e r :
135 degrees,
Water tempera-
ture gauge/Fuel
gauge: 17 seg-
ments.
“2” is dis-
played.
Light at the
highest bright-
ness.
Not beep.
Step 2-2. Release the trip knob: Specifying the meter directing position
Stop at direct-
ing position
when the trip
knob is
released.
Light OFF Keep the posi-
tion indicated
that set in step
1-2.
Display the cur-
rent meter
directing angle
on odometer.
“2” is displayed. Light at the
highest bright-
ness.
Not beep.
Step 3-1. Press the trip knob, and hold it: Check illumination

IDI-6
Combination Meter System
INSTRUMENTATION/DRIVER INFO
•Illuminating order table
Keep the posi-
tion that speci-
fied at step 2-2.
Light OFF Varying from the
highest bright-
ness (ILL6) to
the lowest lumi-
nescence (ILL1)
ever y second.
After reaching at
ILL1, repeat it
from ILL6.
Illumination
brightness is
displayed in the
trip meter. (From
ILL6 to ILL1)
“3” is dis-
played.
Va r y i n g f r o m t h e
highest bright-
ness (ILL6) to
the lowest lumi-
nescence (ILL1)
every second.
After reaching at
ILL1, repeat it
from ILL6.
Not beep.
Step 3-2. Release the trip knob: Specifying the illumination brightness
Keep the posi-
tion that speci-
fied at step 2-2.
Light OFF Keep the bright-
ness at the time
when the trip
knob is
released.
Displays the
brightness at the
time when the
trip knob is
released in the
trip meter.
“3” is displayed. Keep the bright-
ness at the time
when the trip
knob is
released.
Not beep.
Step 4-1. Press the trip knob: Check the beeping of SPORT shift buzzer (For AT model)
All meter indica-
tor needle
returns to lowest
position.
Light OFF Light at the
highest bright-
ness. Keep the
position indi-
cated that set in
step 1-2.
Illumination
brightness is
displayed in the
trip meter.
“8” is dis-
played. Blinks
with buzzer.
Light at the
highest bright-
ness.
SPORT shift
buzzer beeps.
Step 4-2. Press the trip knob: Check the VDC indicator light (Model with VDC)
All meter indica-
tor needle
returns to lowest
position.
VDC warning
light and VDC
operation indica-
tor light blink.
Light at the
highest bright-
ness. Keep the
position indi-
cated that set in
step 1-2.
Illumination
brightness is
displayed in the
trip meter.
“4” is displayed. Light at the
highest bright-
ness.
Not beep.
Step5. Press the trip knob: Complete the self-diagnosis 1 cycle
All meter indicator needle returns to lowest position, and go back to step 1 after completion.
Illuminating
order1234567891011
Tr i p m e t e r A / B A B A B A B A B A B A B
Go back
to 1 and
repeat
Odo/trip meter
8888.8
88888
8
00000
00000
0
1111.1
11111
1
22222
22222
2
3333.3
33333
3
44444
44444
4
5555.5
55555
5
66666
66666
6
7777.7
77777
7
88888
88888
8
9999.9
99999
9
SPORT shift
indicator812345EPRND


Display time
(sec.)10.50.50.50.50.50.50.50.50.50.5
Speedometer,
tachometer, fuel
gauge, engine
coolant temper-
ature gauge
Microcomputer
running type
warning light,
indicator light
AT s e l e c t l e v e r
position indica-
tor light
Odo/Trip indica-
tor
SPORT shift
indicator
Illumination
(indicator nee-
dle, plate, ring,
LCD)
Buzzer (SPORT
shift buzzer)

IDI-7
Combination Meter System
INSTRUMENTATION/DRIVER INFO
3. SYMPTOM CHART
CAUTION:
When measuring the voltage and resistance of each control module or sensor, use a tapered pin with
a diameter of less than 0.64 mm (0.025 in) in order to avoid poor contact. Do not insert the pin more
than 2 mm (0.08 in).
4. CHECK POWER SUPPLY AND GROUND CIRCUIT
Symptom Repair order Note
Combination meter assembly does not
operate.
1. Power supply
2. Ground circuit
3. Combination meter
<Ref. to IDI-7, CHECK POWER SUPPLY
AND GROUND CIRCUIT, INSPECTION,
Combination Meter System.>
Speedometer does not operate. 1. VDCCM
2. Harness
3. Combination meter
<Ref. to IDI-8, CHECK VDCCM.,
INSPECTION, Combination Meter Sys-
tem.>
Ta c h o m e t e r d o e s n o t o p e r a t e . 1 . E C M
2. Harness
3. Combination meter
<Ref. to IDI-8, CHECK ENGINE CON-
TROL MODULE (ECM), INSPECTION,
Combination Meter System.>
Fuel gauge does not operate. 1. Communication circuit
2. Fuel level sensor
3. Harness
4. Combination meter
<Ref. to IDI-9, CHECK FUEL LEVEL
SENSOR., INSPECTION, Combination
Meter System.>
Engine coolant temperature gauge does
not operate.
1. Communication circuit
2. Engine coolant temperature sensor
3. Harness
4. Combination meter
<Ref. to IDI-10, CHECK ENGINE COOL-
ANT TEMPERATURE SENSOR.,
INSPECTION, Combination Meter Sys-
tem.>
Error display is shown on the odo/trip
meter.
Communication circuit <Ref. to IDI-10, COMMUNICATION
ERROR DISPLAY, INSPECTION, Combi-
nation Meter System.>
Step Check Yes No
1CHECK POWER SUPPLY FOR COMBINA-
TION METER.
1) Remove the combination meter. <Ref. to
IDI-11, REMOVAL, Combination Meter.>
2) Disconnect the combination meter harness
connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 3, 4 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 2.Check the harness
for open or shor t
between the igni-
tion switch and
combination
meter.
2CHECK POWER SUPPLY FOR COMBINA-
TION METER.
Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 1, 2 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 3.Check the harness
for open or shor t
between the fuse
and combination
meter.
3CHECK GROUND CIRCUIT OF COMBINA-
TION METER.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness
between combination meter connector and
chassis ground.
Connector & terminal
(i10) No. 15, 16 — Chassis ground:
Is the resistance less than 10
Ω?
Replace the meter
case assembly.
Repair the wiring
harness.

IDI-10
Combination Meter System
INSTRUMENTATION/DRIVER INFO
8. CHECK ENGINE COOLANT TEMPERATURE SENSOR.
9. COMMUNICATION ERROR DISPLAY
When the following error code is displayed in the
odo/trip meter, inspect the communication circuit
since the communication malfunction is generated
between each control module. <Ref. to LAN(diag)-
2, Basic Diagnostic Procedure.>
10.DTC DISPLAY MODE
When DTC display mode is operated, {ECM}, {TCM} is displayed repeatedly in this order by pressing the trip
knob. DTC is displayed in the following table according to type of control module, receiving DTC, DTC de-
tected, No DTC. If CAN communication has some trouble, “-----” is displayed.
Step Check Yes No
1CHECK COMMUNICATION ERROR DIS-
PLAY.
1) Turn the ignition switch to ON.
2) Check that the error code is displayed in
odo/trip meter.
Is the error code “Er xx” dis-
played in odo/trip meter?
Check the commu-
nication circuit.
<Ref. to IDI-10,
COMMUNICA-
TION ERROR
DISPLAY,
INSPECTION,
Combination
Meter System.>
Go to step 2.
2CHECK ENGINE COOLANT TEMPERATURE
SENSOR.
Check the engine coolant temperature sensor.
<Ref. to EN(H6DO)(diag)-2, Basic Diagnostic
Procedure.>
Is the engine coolant tempera-
ture sensor OK?
Replace the meter
case assembly.
Replace the
engine coolant
temperature sen-
sor.
IDI00188
Error code Description
Er IUMalfunction in integrated
module
Er ––
Simultaneous malfunction of
high/low speed CAN com-
munication
Er HCHigh speed CAN communi-
cation malfunction
Er LCMalfunction of low-speed
CAN communication
Er EGEGI Communication mal-
function
Er TCTCM Communication mal-
function
Er AbVDCCM communication
malfunction
Er SP
VDCCM DTC information
and vehicle speed pulse
malfunction
Er SSWheel speed data malfunc-
tion
Er bbVa c u u m p u m p s y s t e m m a l -
function
Control module Condition Display
ECM
Receiving DTC Trip “A” + “P (Blink)”
DTC detected Trip “A” + “P xxxx”
No DTC Trip “A” + “P ----”
TCM
Receiving DTC Trip “B” + “P (Blink)”
DTC detected Trip “B” + “P xxxx”
No DTC Trip “B” + “P ----”
When CAN communication error
is occurred—“-----”

IDI-16
Engine Coolant Temperature Gauge
INSTRUMENTATION/DRIVER INFO
7. Engine Coolant Temperature
Gauge
A: SPECIFICATION
Since the meter case assembly cannot be disas-
sembled, do not remove or inspect the temperature
gauge alone. (Do not remove the cover on the back
side.)

LAN(diag)-3
Check List for Interview
LAN SYSTEM (DIAGNOSTICS)
2. Check List for Interview
A: CHECK
Inspect the following item about the vehicle’s state.
1. DISPLAY OF COMMUNICATION ERROR
2. DISPLAY IN COMBINATION METER
Communication error is
displayed in odo/trip meter.
When and how often are they displayed?
Always
Sometimes
Only once
Which communication error is displayed? (Record them all)
Er IU (Fail in the body integrated unit)
Er HC (Fail of high-speed CAN)
Er LC (Fail of low-speed CAN)
Er –– (Fails of both high-speed and low-speed CAN)
Er EG (Fail of EGI communication data)
Er TC (fail of TCM communication data)
Er Ab (Fail of vehicle dynamics control (VDC)/ABS communication data)
Er bb (Fail of brake vacuum system)
Ignition key position OFF
ACC
ON (Before starting engine)
START
ON (After starting Engine, engine is running)
ON (After starting Engine, engine is at a standstill)
Timing Immediately after turning the ignition to ON.
Immediately after turning the ignition to START.
Display in combination
meter
a) Display of engine coolant temperature gauge OK / NG
b) Display of fuel gauge OK / NG
Display of other indicators c) Malfunction indicator light ON / OFF
d) SPORT indicator light (AT warning light) ON / OFF
e) ABS warning light/Vehicle dynamics control (VDC) warning
light ON / OFF
f) Security indicator light ON / Blink / OFF
g) Seat belt warning light (Driver’s seat) ON / OFF
h) Seat belt warning light (Passenger’s seat) ON / OFF