2004 SUBARU FORESTER diagram

4AT(H4DOTC)-110
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AA:DTC P1718 CAN COMMUNICATION CIRCUIT
DTC DETECTING CONDITION:
Input signal circuit of TCM is open or shorted.
WIRING DIAGRAM:
Step Check Yes No
1 CHECK DTC.Are multiple DTCs displayed in
the on-board diagnostics test
mode?Go to other DTC. Go to step 2.
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
ECM.
3) Measure the resistance of harness
between TCM and ECM connectors.
Connector & terminal
(B55) No. 3 — (B137) No. 18:Is the resistance less than 1
Ω?Go to step 3.Repair the open
circuit in harness
between TCM and
ECM or poor con-
tact of connector.
AT-01853
1832612
B55
B137
ECM
B55
TCM
B137
12
7
8956 3410 11 12
19 20 2113 14 15 16
17 1822
23
24
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
TWISTED WIRE

4AT(H4DOTC)-112
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
14.Diagnostic Procedure without Diagnostic Trouble Code (DTC)
A: CHECK FWD SWITCH
DIAGNOSIS:
 The LED does not come on even if FWD switch is ON.
 The FWD signal circuit is open or short.
WIRING DIAGRAM:
 LHD model
AT-01854
BATTERYSBF-4 SBF-1
No.14
IGNITION
SWITCH
FWD
i10
i2
B37
B56TCM
F45
B62
F27
22
9
36
16
35
14
17
COMBINATION
METER
E
E
FWD SWITCH
159i3
B38
123456
78 9 10 1112
13
14
15 16 17
181920
21
2223
24
2526
272829
30
1234
578
910112324
121314
156
16 17 1819
20 2122123 4
57
8
91011
121314
156
16
219
32
B38
1234
5610 11 12 13 14 15716
23 3019 20
22 26 27 28 29817
24 3118
2556789
1011121314
1516171819
2021222324
252627282936
3512
34
3031323334
F27
B56
i10B37F45
12
789 56 3
410 11 1219 20 21
29 30 31 13 14 15 1617
27 2818
22 23 24 25 26

4AT(H4DOTC)-116
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
B: CHECK POWER SWITCH
DIAGNOSIS:
 The LED does not come on when POWER switch is ON.
 The POWER switch circuit is open or shorted.
TROUBLE SYMPTOM:
No POWER mode occurs.
WIRING DIAGRAM:
 LHD model
AT-01856
SBF-4 SBF-1
No.13
i10 B:
B54
TCM A:B56
R92 C: C:
i11
C2
B9
C25
A8
E
E
B54
B56
123456
78910 1112
13
14
15 16 17
1819
2021
2223
24
2526
2728
2930
i10
12345678910
i11
5
4 POWER
POWEROFF HOLD
B37
B98
R92
12
34
56
i2
B375B98
R221
i3
B386
B38
219
32
1234 5610 11 12 13 14 15716
23 3019 20
22 26 27 28 29817
24 3118
25
12 345678910111213141516171819202129303122232425262728
POWER AND HOLD
SWITCH BATTERY IGNITION
SWITCH
COMBINATION
METER
123
89
10411 12
13 14 15 1656
7
1734 12 8910 11
12 13 14 15 16 17 18 19 20 21 22 23 24567
A:
C:
B:
C:

4AT(H4DOTC)-120
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
C: CHECK HOLD SWITCH
DIAGNOSIS:
 The LED does not come on when HOLD switch is ON.
 The HOLD switch circuit is open or shorted.
TROUBLE SYMPTOM:
 The 2nd gear is not held.
 Failure of vehicle to start in 2nd gear except 1st range.
WIRING DIAGRAM:
 LHD model
AT-01858
SBF-4 SBF-1
No.14
i10
i2
B37
B54
R92
B14
9
5
E
B54
123456
78 9 10 1112
13
14
15 16 17
1819
2021
2223
24
2526
2728
2930
i10
POWEROFF HOLD
3
4
E
HOLD
R92
12
34
56219
32
B38
1234
56
10 11 12 13 14 157
16
23 3019 20
22 26 27 28 298
17
24 3118
25
12i3
B38
20B98
R2
26
POWER AND HOLD
SWITCH IGNITION
SWITCHBATTERY
COMBINATION
METER
TCM
123
8910411 12
13 14 15 1656
7
17
B98
B37
1234
5678
910
11
121314
1516 17 1819
20 2122

4AT(H4DOTC)-124
AUTOMATIC TRANSMISSION (DIAGNOSTIC)
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
D: CHECK KICK–DOWN SWITCH
DIAGNOSIS:
 The kick-down switch is OFF when the throttle is partially open or fully closed, but it is not ON when the
throttle is fully opened.
 The kick-down switch circuit is open or shorted.
TROUBLE SYMPTOM:
No kick-down occurs (when the throttle is fully opened).
WIRING DIAGRAM:
Step Check Yes No
1 CONFIRM MODEL.Is the vehicle 2.0 L model? Go to step 2.Go to Symptom
Related Diagnostic.
4AT(H4DOTC)-
126, Symptom
Related Diagnos-
tic.>
2 CHECK KICK-DOWN SWITCH OPERATION.When the accelerator pedal is
depressed, does “ON” dis-
played?Go to Symptom
Related Diagnostic.
4AT(H4DOTC)-
126, Symptom
Related Diagnos-
tic.>Go to step 3.
AT-01860
E
B54
B54 TCM
KICK-DOWN
SWITCH
B129 1 2
B129
11
1
2123
8910411 12
13 14 15 1656
7
17

CL-42
CLUTCH SYSTEM
General Diagnostic Table
12.General Diagnostic Table
A: INSPECTION
1. CLUTCH
Symptom Possible cause Corrective
1. Clutch slippage.
It is hard to perceive clutch slippage in
the early stage, but pay attention to the
following symptoms
 Engine speed up when shifting.
 High speed driving is impossible; espe-
cially rapid acceleration impossible and
vehicle speed does not increase in pro-
portion to an increase in engine speed.
 Power falls, particularly when ascend-
ing a slope, and there is a smell of burn-
ing of the clutch facing.
 Method of testing: Put the vehicle in
stationary condition with parking brake
fully applied. Disengage the clutch and
shift the transmission gear into the first.
Gradually allow the clutch to engage
while gradually increasing the engine
speed. The clutch function is satisfactory
if the engine stalls. However, the clutch is
slipping if the vehicle does not start off
and the engine does not stall.(a) Clutch facing smeared by oil Replace.
(b) Worn clutch facing Replace.
(c) Deteriorated diaphragm spring Replace.
(d) Distorted pressure plate or flywheel Replace.
(e) Defective release bearing holder Replace.
2. Clutch drags.
As a symptom of this trouble, a harsh
scratching noise develops and control
becomes quite difficult when shifting
gears. The symptom becomes more
apparent when shifting into the first gear.
However, because much trouble of this
sort is due to defective synchronization
mechanism, carry out the test as
described after.
 Method of testing: DIAGNOSTIC DIAGRAM OF CLUTCH
DRAG, INSPECTION, General Diagnos-
tic Table.>
It may be judged as insufficient disen-
gagement of clutch if any noise occurs
during this test.(a) Worn or rusty clutch disc hub spline Replace the clutch disc.
(b) Excessive deflection of clutch disc
facingReplace.
(c) Malfunction of crankshaft pilot bearing Replace.
(d) Cracked clutch disc facing Replace.
(e) Stuck clutch disc (smeared by oil or
water)Replace.
3. Clutch chatters.
Clutch chattering is an unpleasant vibra-
tion to the whole body when the vehicle is
just started with clutch partially engaged.(a) Adhesion of oil on the facing Replace the clutch disc.
(b) Weak or broken torsion spring Replace the clutch disc.
(c) Defective facing contact or excessive
disc wornReplace the clutch disc defection.
(d) Warped pressure plate or flywheel Replace.
(e) Loose disc rivets Replace the clutch disc.
(f) Loose engine mounting Retighten or replace the mounting.
(g) Improper adjustment of pitching stop-
perAdjustment.

CL-43
CLUTCH SYSTEM
General Diagnostic Table
2. CLUTCH PEDAL
3. DIAGNOSTIC DIAGRAM OF CLUTCH DRAG
4. Noisy clutch
Examine whether the noise is generated
when the clutch is disengaged, engaged,
or partially engaged.(a) Broken, worn or unlubricated release
bearingReplace the release bearing.
(b) Insufficient lubrication of pilot bearing Replace.
(c) Loose clutch disc hub Replace the clutch disc.
(d) Loose torsion spring retainer Replace the clutch disc.
(e) Deteriorated or broken torsion spring Replace the clutch disc.
5. Clutch grabs.
When starting the vehicle with the clutch
partially engaged, the clutch engages
suddenly and the vehicle jumps instead
of making a smooth start.(a) Grease or oil on facing Replace the clutch disc.
(b) Deteriorated cushioning spring Replace the clutch disc.
(c) Worn or rusted spline of clutch disc or
main shaftTake off rust, apply grease or replace the
clutch disc or main shaft.
(d) Deteriorated or broken torsion spring Replace the clutch disc.
(e) Loose engine mounting Retighten or replace the mounting.
(f) Deteriorated diaphragm spring Replace.
Trouble Corrective action
Insufficient pedal play Adjust pedal play.
Clutch pedal free play insufficient Adjust pedal free play.
Excessively worn and damaged pedal shaft and/or bushing Replace the bushing and/or shaft with a new one.
Step Check Yes No
1 CHECK GEAR NOISE.
1) Start the engine.
2) Disengage the clutch and shift quickly from
neutral to reverse in idling condition.Is there any abnormal noise
from the transmission gear?Go to step 2.Clutch is normal.
2 CHECK GEAR NOISE.
Disengage the clutch at idle and shift from neu-
tral to reverse within 0.5 — 1.0 seconds.Is there any abnormal noise
from the transmission gear?Go to step 3.Defective trans-
mission or exces-
sive clutch drag
torque. Inspect the
pilot bearing,
clutch disc, trans-
mission and clutch
disc hub spline.
3 CHECK GEAR NOISE.
1) Disengage the clutch at idle and shift from
neutral to reverse within 0.5 — 1.0 seconds.
2) With the clutch disengaged, shift from N to
R, R to N several times.Is there any abnormal noise
from the transmission gear?Defect in clutch
disengaging.
Inspect the clutch
disc, clutch cover,
clutch release, and
clutch pedal free
play.Clutch and fly-
wheel seizure.
Inspect the clutch
disc, spline of
clutch disc hub. Symptom Possible cause Corrective