2004 SUBARU FORESTER diagram

AC-35
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Diagnostic Procedure for Sensors
B: IN-VEHICLE SENSOR
TROUBLE SYMPTOM:
 Blower fan speed, outlet port and inlet port do not change after turning the AUTO switch to ON.
 Malfunction related to ambient sensor is indicated in self diagnosis.
WIRING DIAGRAM:
AC-00157
A:
i48B:
i49
12345678
910 11 12 13 14 15 1612345678910
11 12 13 14 15 16 17 18 19 20
i55 :
IN-VEHICLE
SENSOR
A:
i48B:
i49
A16
1
B12
2
12
AUTO A/C
CONTROL
MODULE
LHD
LHD
RHD
RHD
LHD
RHD
LHD
RHD
924
B314 :
: LHD MODEL
: RHD MODEL
LHD
RHD
LHD
RHD
LHD
RHD
i55 :
B314 :
LHD
RHD
3
4 128910 11
12 13 14 15 16 17 18 19 20 21 22 23 24567
B202
B202
i41

AC-37
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Diagnostic Procedure for Sensors
C: EVAPORATOR SENSOR
WIRING DIAGRAM:
AC-00158
A:
i48B:
i49B256
12345678
910 11 12 13 14 15 1612345678910
11 12 13 14 15 16 17 18 19 203
4 128910 11
12 13 14 15 16 17 18 19 20 21 22 23 24567
B202
B202
i41
B256
A:
i48B:
i49
A16
5
1
B23
15
123
EVAPORATOR
SENSOR
AUTO A/C
CONTROL
MODULE
119RHD LHD
: LHD MODEL
: RHD MODELLHD
RHD

AC-39
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Diagnostic Procedure for Sensors
D: SUNLOAD SENSOR
TROUBLE SYMPTOM:
 Sensor identifies that sunlight is at maximum. Then, A/C system is controlled to COOL side.
 Sensor identifies that sunlight is at minimum. Then, A/C system is controlled to HOT side.
NOTE:
When the sunload sensor check is conducted indoors or in the shade, open circuit might be indicated. Always
check the sunload sensor at the place where the sun shines directly on it.
WIRING DIAGRAM:
AC-00885
A:
i48B:
i49
12345678
910 11 12 13 14 15 1612345678910
11 12 13 14 15 16 17 18 19 20
3
4 128910 11
12 13 14 15 16 17 18 19 20 21 22 23 24567
B202
B202
i41
i51
A:
i48B:
i49
A16
9
2
B31
12
2223
i3
B38
i51
12
SUNLOAD
SENSOR
AUTO A/C
CONTROL
MODULE
B38
219
32
1234 5610 11 12 13 14 15716
23 3019 20
22 26 27 28 29817
24 3118
25
RHD
1520LHD
LHD
LHD
RHD
RHD
LHD
RHD
LHD
RHD
2019
177i2
B37
: LHD MODEL
: RHD MODEL
LHD
RHD
LHD
RHD
3
4 128910
11 12 13 14 15 16 17 18 19 20 21 22567
i2 :
3
4 128
910 11 12 13 14 15 16 17 18567
i2 :ATMT
AT
: MT MODEL
: AT MODEL
ATMT
MT

AB-21
AIRBAG SYSTEM (DIAGNOSTIC)
Airbag Control Module I/O Signal
5. Airbag Control Module I/O Signal
A: WIRING DIAGRAM
1. LHD MODEL
B31(BLACK)(GREEN)
(GREEN) (YELLOW)
(YELLOW)B82
WI-03204
7
6
2
3
8
GWGRGY
GY
R
GRGB
GRL
W
GYRGRLW
19
BB28
1
R
2354
653192
AIRBAG
CIRCUIT AIRBAG
WARNING LED
IG
IGNITION RELAY
(IG) FB-33
F/B FUSE No. 14
(IG)FB-20
F/B FUSE No. 11
(IG)FB-21
F/B FUSE No. 6
(IG)
L
GR
GW
W
B
GRGR5GR
GB
B9
C8
BB10
1
2
L
W
REF. TO GND(L)-04
CHECK
CONNECTOR
DIAGNOSIS
CONNECTOR
DIAGNOSIS
TERMINAL
B31
AB1
AIRBAG CONTROL MODULE
AB3
B81
B82
B79B38i3
B37i2
TO POWER SUPPLY ROUTING
(GRAY)
B79
1234567891011121314
B
B
12
3456
B37
AB3
COMBINATION
METER B: C:
i11i10
i11
i10 B: C:
A/B(L)-01
A/B(L)-01
12345678910
123456789101112131415161718192021222324252627282930
34 128910 11
12 13 14 15 16 17 18 19 20 21 22 23 24567
1234567891011121314151617
1819202122232425262728
1
34562
B38
219
32
1234 5610 11 12 13 14 15716
23 3019 20
22 26 27 28 29817
24 3118
25
REF. TO GND(L)-02
BB

AB-35
AIRBAG SYSTEM (DIAGNOSTIC)
Airbag Warning Light Failure
1. LHD MODEL
WIRING DIAGRAM:
Step Check Yes No
1 CHECK POOR CONTACT IN CONNECTORS
(AB1) AND (B31).
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Remove the side sill cover. (Driver’s side)
3) Confirm that firm contact is secured
between connectors (AB1) and (B31).Is the poor contact in connec-
tors (AB1) and (B31)?Repair the body
harness or replace
the airbag main
harness with body
harness.Go to step 2.
AB-00739
12
34561
2345678910123456789101112131415161718192021222324252627282930
B31 i11AB3
i10
B:
C: i10
i11
AIRBAG
WARNING
LIGHTCOMBINATION
METERB9
B8
B10
NO.14
i3B38 28
i2B37 19
5
AIRBAG CONTROL MODULEAB3
B31
AB1
3
3
AIRBAG
CIRCUIT
E
BATTERY
1234567891011121314151617
1819202122232425262728
IGNITION
SWITCH
B: C:

AB-37
AIRBAG SYSTEM (DIAGNOSTIC)
Airbag Warning Light Failure
2. RHD MODEL
WIRING DIAGRAM:
Step Check Yes No
1 CHECK POOR CONTACT IN CONNECTORS
(AB1) AND (B31).
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Remove the side sill cover. (Driver’s side)
3) Confirm that firm contact is secured
between connectors (AB1) and (B31).Is the poor contact in connec-
tors (AB1) and (B31)?Repair the body
harness or replace
the airbag main
harness with body
harness.Go to step 2.
AB-00740
12
34561
2345678910123456789101112131415161718192021222324252627282930
B31 i11AB3
i10
B:
C: i10
i11
AIRBAG
WARNING
LIGHTCOMBINATION
METERB9
B8
B10
NO.14
i3B38 20
10
16
AIRBAG CONTROL MODULEAB3
B31
AB1
1
3
AIRBAG
CIRCUIT
E
BATTERY
1234567891011121314151617
1819202122232425262728
IGNITION
SWITCH

AB-39
AIRBAG SYSTEM (DIAGNOSTIC)
Airbag Warning Light Failure
B: AIRBAG WARNING LIGHT REMAINS OFF.
DIAGNOSIS:
 Fuse No. 14 (in fuse box) is blown.
 Body harness circuit is open.
 Airbag warning light is faulty.
 Airbag main harness is faulty.
 Airbag control module is faulty.
CAUTION:
 Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the
ground cable from battery, and wait more than 20 seconds before starting to work.
 After replacing the airbag module, seat belt pretensioner, roll connector, control module or sensor,
reconnect each part and confirm that the airbag warning light operates properly.
 When inspecting the airbag main harness, disconnect the airbag module connector of the driver
and passenger seats for safety reasons.
1. LHD MODEL
WIRING DIAGRAM:
AB-00739
12
34561
2345678910123456789101112131415161718192021222324252627282930
B31 i11AB3
i10
B:
C: i10
i11
AIRBAG
WARNING
LIGHTCOMBINATION
METERB9
B8
B10
NO.14
i3B38 28
i2B37 19
5
AIRBAG CONTROL MODULEAB3
B31
AB1
3
3
AIRBAG
CIRCUIT
E
BATTERY
1234567891011121314151617
1819202122232425262728
IGNITION
SWITCH
B: C:

AB-41
AIRBAG SYSTEM (DIAGNOSTIC)
Airbag Warning Light Failure
2. RHD MODEL
WIRING DIAGRAM:
AB-00740
12
34561
2345678910123456789101112131415161718192021222324252627282930
B31 i11AB3
i10
B:
C: i10
i11
AIRBAG
WARNING
LIGHTCOMBINATION
METERB9
B8
B10
NO.14
i3B38 20
10
16
AIRBAG CONTROL MODULEAB3
B31
AB1
1
3
AIRBAG
CIRCUIT
E
BATTERY
1234567891011121314151617
1819202122232425262728
IGNITION
SWITCH