ESP SUBARU FORESTER 2004 Service Repair Manual

AC-26
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
Refrigerant Recovery Procedure
3. Refrigerant Recovery Proce-
dure
A: OPERATION
CAUTION:
 During operation, be sure to wear safety gog-
gles and protective gloves.
 Connect the refrigerant recovery system with
the manifold gauge set to discharge the refrig-
erant from the A/C system and reuse it.
 When reusing the discharged refrigerant, keep
service cans on hand. Because the discharge
rate with the recovery system is approx. 90%, ser-
vice cans are necessary to charge the refrigerant.
 Follow the detailed operation procedure de-
scribed in the operation manual attached to the
refrigerant recovery system.
1) Perform the compressor oil return operation.

2) Stop the engine.
3) Make sure the valves on low-/high-pressure
sides of manifold gauge set are fully closed.4) Install the low-/high-pressure hoses to the ser-
vice ports on the low-/high-pressure sides of the
vehicle respectively.
5) Connect the center hose to the refrigerant recov-
ery system.
6) Follow the operation manual to activate the re-
frigerant recovery system.
L: Low-pressure gauge
H: High-pressure gauge
(1) Low-pressure valve
(2) Vacuum pump valve
(3) High-pressure valve
(4) For low-pressure
(5) For vacuum pump
(6) For high-pressure
AC-00146
(2) (4)
(5)(6)
(3)(3)
(2) (1)H L
(1)
(1) Low-pressure service port
(2) High-pressure service port
(3) Close
AC-00147
(3) (2) (1)

AC-30
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
Refrigerant Leak Check
5. Refrigerant Leak Check
A: INSPECTION
1) Operate the A/C system for approx. 10 minutes,
and confirm that the high-pressure side shows at
least 690 kPa (7.03 kg/cm
2, 100 psi). Then stop the
engine to start the leak test.
2) Starting from the connection between the high-
pressure 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 the pressure
switch (triple pressure switch) and high-pressure
pipe.
4) Check the connections between the 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 the compressor and
hoses.
6) Check the machined area of 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 28 g (1.0 oz) per year. This is not a problem.
8) Starting from the connection between the low-
pressure 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 two parts
 Connection between the pipe and plate
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 switch to ON, and run the
blower at high speed for 1 minute. Stop the blower
to check the ventilation grille on the instrument pan-
el. While moving the tester closer to the grille, run
the blower for 1 or 2 seconds, then stop it. Check
the grille at that point for at least 10 seconds.
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-40
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
Evaporator
15.Evaporator
A: REMOVAL
1) Perform the refrigerant recovery operation, and
then disconnect the toe board area A/C pipe. to AC-26, OPERATION, Refrigerant Recovery Pro-
cedure.>
2) Remove the glove box.
3) Remove blower motor unit assembly. AC-32, REMOVAL, Blower Motor Unit Assembly.>
4) Loosen the screws and remove evaporator cov-
er.
5) Remove the A/C pipes in unit.
6) Rotate the upper part of evaporator tilt toward
the front vehicle and the lower part tilt toward the in-
terior, respectively. Then pull out the heater case to
the left side.
7) Remove the two bolts to remove expansion
valve.
CAUTION:
If the evaporator is replaced, add appropriate
amount of compressor oil to evaporator. to AC-31, REPLACEMENT, Compressor Oil.>
B: INSTALLATION
Install in the reverse order of removal.
NOTE:
Replace the O-ring for A/C pipe with a new one,
and then apply compressor oil.
AC-00867
AC-00868

AC-2
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Basic Diagnostics Procedure
1. Basic Diagnostics Procedure
A: PROCEDURE
Step Check Yes No
1 START INSPECTIONS.
1) Perform the pre-inspection. INSPECTION, General Description.>
2) Perform the self-diagnosis. OPERATION, Diagnostic Chart for Self-Diag-
nosis.>Does the self-diagnosis oper-
ate?Go to step 2. C OR SELF-DIAG-
NOSIS SYS-
TEMS DO NOT
OPERATE, Diag-
nostics for A/C
System Malfunc-
tion.>
2 IDENTIFY MALFUNCTION PART.
Identify the malfunction part with self-diagno-
sis.Can the malfunction part be
identified?Repair the mal-
function part in
accordance with
each diagnostic
chart.Go to step 3.
3 CHECK 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. COMPARTMENT
TEMPERATURE
DOES NOT
CHANGE, OR A/C
SYSTEM DOES
NOT RESPOND
PROMPTLY.,
Diagnostics for A/
C System Mal-
function.>
4 CHECK 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. COMPARTMENT
TEMPERATURE
DOES NOT
CHANGE, OR A/C
SYSTEM DOES
NOT RESPOND
PROMPTLY.,
Diagnostics for A/
C System Mal-
function.>

AC-10
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Diagnostic Chart for Self-Diagnosis
Step Check Yes No
1 SELECT CONTROL PANEL TO SELF-DIAG-
NOSIS MODE.
1) Turn the ignition switch to OFF.
2) Start the engine while pressing defroster
switch and A/C switch.
N
OTE:
Self-diagnosis can also be performed with the
ignition switch ON, but start the engine be-
cause telling the magnet clutch operation is dif-
ficult.
3) The LED in A/C control panel blinks.Does the self-diagnosis mode
operate?Go to step 2. C OR SELF-DIAG-
NOSIS SYS-
TEMS DO NOT
OPERATE, Diag-
nostics for A/C
System Malfunc-
tion.>
2 CHECK LED ILLUMINATION.
Make sure that three LED blink in turn on A/C
control panel (5 patterns are repeated 2 times).Do all LED blink? Go to step 3.Go to step 5.
3 CHECK SENSORS MALFUNCTION.
1) After completing the LED check or when
AUTO switch is pressed, the A/C switch LED
illuminates, and then the sensor check is
started.
2) Check the input signal of each sensor in
turn. If there are any trouble for each sensor,
DEF, MODE and fan speed LEDs are blinked.
Also check for each sensor is possible respec-
tively every time AUTO switch is pressed. (At
this time, the AUTO switch LED illuminates.)
3) If there is no trouble, DEF, MODE and fan
speed LEDs are turned off.
N
OTE:
Rear window defogger LED illuminates in case
of stored malfunction but does not illuminate in
case of present malfunction.Does each DEF, MODE and
fan speed LED turn off?Go to step 4.Confirm the com-
bination of illumi-
nating LEDs by
using Sensor
Check Table, and
identify the mal-
functioning sensor
before repairing.
SENSOR CHECK
TABLE, OPERA-
TION, Diagnostic
Chart for Self-
Diagnosis.>
4 CHECK OPERATION OF EACH ACTUATOR,
COMPRESSOR AND FAN MOTOR.
1) Press the FRESH/RECIRC switch
(FRESH/RECIRC switch LED illuminates at
this time.).
2) Refer to OPERATING MODE TABLE to
check the operation of each actuator, compres-
sor and fan motor. ING MODE TABLE, OPERATION, Diagnostic
Chart for Self-Diagnosis.>
Also check for each step is possible respec-
tively every time AUTO switch pressed. (At this
time, the AUTO switch LED illuminates.)Does each actuator, compres-
sor and fan motor operate
according to operating mode
table?Press the OFF
switch or turn the
ignition switch to
OFF and finish the
self-diagnosis
mode.Refer to each
diagnostics chart
for actuator, com-
pressor and fan
motor, and repair
the malfunctioning
par t as necessary.
Diagnostics for A/
C System Mal-
function.> AC-21, Diagnostic
Procedure for
Actuators.>
5 CHECK POOR CONTACT.
Check the auto A/C control module connector
for poor contact.Is there a poor contact in con-
nector?Replace the auto
A/C control mod-
ule.Repair the con-
nector.

AC-16
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Diagnostics for A/C System Malfunction
C: COMPARTMENT TEMPERATURE DOES NOT CHANGE, OR A/C SYSTEM
DOES NOT RESPOND PROMPTLY.
TROUBLE SYMPTOM:
 Compartment temperature is not changed. (No cool air is discharged.)
 A/C system does not respond quickly.
WIRING DIAGRAM:
 LHD model
AC-00882
A: B134 :
B: B135 :
B202
D: B137 :C: B136 :
F2F27
EA:
i48
F27
F17
F79
F45
B62
B202
i41
F24
F24
F16F79
F45
F17
B:
i49A:
B134 B136
B135 B137C:
B:D:IGNITION
SWITCHBATTERY
A/C RELAY HOLDER
FAN RELAY
FAN RELAY
A/C RELAY
PRESSURE SWITCH
COMPRESSOR
MAGNET
CLUTCH FAN MODE RELAYSUB FAN FUSE
MAIN FAN FUSE
MAIN FAN MOTOR
1
M
SBF-1SBF-4F/B NO.17
F/B NO.18
1
2
3
2
1
4
3033
32 31
34
86
7 9
5
2926
27 28
25
1916
15 18
17
43
21
B15A10B17
F17
MAIN FAN MOTOR
M
F16
SUB FAN MOTOR
M
F16
SUB FAN MOTOR
M
1
2112 1314
15 16171819
20
10
1121222324
2526272829
3031323334
35
36
12
93456
7
82 314
567
82 1
94
310
24 22 23 251112131415
26 27
281617181920 21
4
1
53
2618 15 167891011
17 19
20121314
1234567891011121314151617181920212223242526272829303132333435
AUTO A/C
CONTROL MODULE ECM
2421
1234 5678910 11 12 13 14 15 16 17 18 19 20
123 4567
8910 11 12 13 14 15 16
56
78 2 1
94
310
24 22 23 251112131415
261617181920 21
34 12 8910 11
12 13 14 15 16 17 18 19 20 21 22 23 24567
D: B137 :
B: B135 :C: B136 :
A: i48
12345678
910 11 12 13 14 15 16
B: i49
12345678910
11 12 13 14 15 1617 18 19 20
: TURBO MODEL : B33
NON-TURBO MODEL : A91*
: TURBO MODEL : B24
NON-TURBO MODEL : A132*
: TURBO MODEL : B25
NON-TURBO MODEL : A143*
: TURBO MODEL : C30
NON-TURBO MODEL : B114*
: TURBO MODEL : D17
NON-TURBO MODEL : C115*
: TURBO MODEL : D13
NON-TURBO MODEL : D136*
: TURBO MODELTB
: NON-TURBO MODEL
NA
: EXCEPT NON-TURBO
AT MODEL
ET
ETNA
TB
TBNANANATB
1112
10
3
18 1
*2*3*4*5*6*
2F2
B100
ET
ETTA
TA
ET
TA
ET
: TURBO AT MODEL
TATA
TA
ET
:
ET :
F16
F17
TA :
TA :
567
82 1
94 310
24 22 23 2511 12 13 14 15
26 27
2816 17 18 19
20 21
29 30 31 32 33 34 3556
782 1
94 310
24 22 23 2511 12 13
1415
26 27
2816
17 18 19 20 21
33 34 29
32 30
31 35
567
82 1
94 310
22 23 11 12 13 14 15
24 25
2616 17
18 19 20 21
27 28 29 30 31
12
1
2
2 1
12

AC-41
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
General Diagnostic Table
9. General Diagnostic Table
A: INSPECTION
Symptom Problem parts
A/C system fails to operate.Fuse
 Connector (Poor contact)
Ground
 Auto A/C control module
 Blower fan motor
 Blower fan relay
 A/C Relay
 Compressor (Magnet clutch)
 Evaporator sensor
Fuse is blown out.Fuse
 Connector (Poor contact)
Illumination cannot dim.Fuse
 Connector (Poor contact)
 Auto A/C control module
Blower fan does not rotate or fan speed cannot be controlled.Fuse
 Connector (Poor contact)
Ground
 Auto A/C control module
 Blower fan motor
 Blower fan relay
Unable to switch suction vents. Connector (Poor contact)
 Auto A/C control module
 Intake door actuator
Unable to switch blow vents. Connector (Poor contact)
 Auto A/C control module
 Mode door actuator
Compartment temperature does not increase. (No hot air is dis-
charged.) Connector (Poor contact)
 Auto A/C control module
 Air mix door actuator
 In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
 In-vehicle sensor aspirator hose
Compartment temperature does not decrease. (No cool air is
discharged.) Connector (Poor contact)
 Auto A/C control module
 Air mix door actuator
 A/C Relay
 Compressor (Magnet clutch)
 Radiator fan motor
 Radiator fan relay
 In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
 In-vehicle sensor aspirator hose
Compartment temperature is higher or lower than setting tem-
perature. Auto A/C control module
 Air mix door actuator
 In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
 In-vehicle sensor aspirator hose
Compartment temperature does not quickly respond to setting
temperature. Air mix door actuator
 In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
 In-vehicle sensor aspirator hose
Radiator fan does not rotate during A/C operation. Radiator fan motor
 Radiator fan relay

AB-17
AIRBAG SYSTEM
Side Airbag Module
3) Install the side airbag harness to backrest frame
assembly.
NOTE:
Secure the harness to its original position of seat.
4) Install the backrest cover. SEMBLY, Front Seat.>
5) Install the side airbag harness to slide rail IN (A).
6) Recline the seat or slide it backward and for-
ward. Check there is no contact between seat
backrest assembly, cushion cover assembly and
side airbag harness. C: INSPECTION
CAUTION:
Before working on the airbag module, refer to
the “CAUTION” in General Description. AB-3, CAUTION, General Description.>
Perform the inspection of following items, and replace
the damaged parts with new ones. SIDE AIRBAG MODULE, INSPECTION, Inspec-
tion Locations After a Collision.>
1) With side clash (when side airbag is deployed)

 Side airbag module assembly
 Backrest pad assembly
 Backrest frame assembly
 Backrest cover assembly
damaged by visual check>
 Headrest assembly
 Bushing
 Slide rail OUT
 Slide rail IN
 Seat hinge cover
 Seat lifter lever
 Reclining lever
 Side airbag harness and connector (body side)
2) With side clash (when side airbag is not de-
ployed)
Check the seat and airbag module visually, and
then replace them with new ones if damaged or
cracked.
Specially inspect the damage of airbag module
body, installing bracket, harness connector.
3) Without side clash (dirt and damage of cover)
Replace the corresponding part with a new one.
AB-00475
AB-00474
(A)

AB-22
AIRBAG SYSTEM
Airbag Module Disposal (Deployment Processing On Vehicle)
11.Airbag Module Disposal (De-
ployment Processing On Ve-
hicle)
A: OPERATION
CAUTION:
 Do not discard an undeployed airbag mod-
ules because it may cause a serious personal
injury when accidentally deployed.
 As a rule, the airbag module should be de-
ployed while still installed in the vehicle. Do not
remove the airbag modules unless necessary.
 Deployment of the airbag module should be
done on a flat place free from any possible dan-
ger. Avoid deploying outdoors during rainy or
windy weather.
 Deploying the airbag module causes a high
explosive noise, be sure to warn people in the
area, and do not allow anyone within a 5 m (16
ft) radius of the disposal site.
 Some smoke will be emitted from deployment
of the airbag module. Therefore, it must be de-
ployed in a well-ventilated place with no smoke
detector nearby.
 Wear protective gloves, safety goggles and
earplugs during this operation. Wash your hands
afterwards.
 After deployment, the airbag module will be
especially hot, leave it unattended for 40 min-
utes, and then discard it.
 Do not let water get on the deployed airbag
module.
 Wrap the deployed airbag module in an air-
tight vinyl bag, and discard it.
 If circumstances do not permit the airbag
module deployment, contact the SUBARU deal-
er.
1. DRIVER’S AIRBAG MODULE
1) Turn the ignition switch to OFF.
2) Disconnect the ground cable from battery and
wait for at least 20 seconds before starting work.
3) Remove the lower cover. MOVAL, Instrument Panel Assembly.>4) Disconnect the airbag connector (AB30) and
(AB2) below steering column.
5) Short the terminal to alligator clip furnished as
deployment tool (A).
6) Connect the deployment tool and deployment
adapter A (B).
CAUTION:
The deployment tool should be kept shorted
terminals until just before deployment of airbag
module.
7) Connect the deployment adapter A to airbag
connector (AB30).
(A) Deployment tool:
(Tool number 98299PA030)
(B) Deployment adapter A:
(Tool number 98299SA030)
(1) Deployment adapter A:
(Tool number 98299SA030)
AB-00197
AB30
AB2
SB-00016
AB-00198
AB30
(1)

AB-23
AIRBAG SYSTEM
Airbag Module Disposal (Deployment Processing On Vehicle)
8) Extend the wiring of deployment tool to the limit,
and make sure that the vehicle is empty. Close all
the windows, sunroof and rear gate completely.
9) Move the battery at least 5 m (16 ft) from vehicle,
and secure the nearby area. Connect the deploy-
ment tool alligator clip to the battery negative (−)
terminal.
10) Connect the other cable of deployment tool to
the battery positive (+) terminal, and deploy the air-
bag module.
CAUTION:
 After deployment, the airbag module will be
especially hot, leave it unattended for 40 min-
utes, and then discard it.
 Do not let water get on the deployed airbag
module.
11) Remove the airbag module. Driver’s Airbag Module.>
12) Wrap the deployed airbag module in airtight vi-
nyl bag, and discard it.2. PASSENGER’S AIRBAG MODULE
1) Turn the ignition switch to OFF.
2) Disconnect the ground cable from battery and
wait for at least 20 seconds before starting work.
3) Remove the glove box.
4) Disconnect the airbag connectors (AB4) and
(AB27).
5) Short the terminal to alligator clip furnished as
deployment tool (A)
6) Connect the deployment tool (A) and deploy-
ment adapter E (B).
CAUTION:
The deployment tool should be kept shorted
terminals until just before deployment of airbag
module.
7) Connect the deployment adapter E to the airbag
connector (AB27).
SB-00017
SB-00018
AB-00043
(A) Deployment tool:
(Tool number 98299PA030)
(B) Deployment adapter E:
(Tool number 98299SA030)
(1) Deployment adapter E:
(Tool number 98299SA030)
SB-00016
AB-00199
AB27
(1)