ECO mode SUBARU FORESTER 2004 Service Manual PDF

EN(H4SO)-139
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AB:DTC P0172 SYSTEM TOO RICH (BANK 1)
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
 Erroneous idling
 Engine stalls.
 Poor driving performance
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
Step Check Yes No
1 CHECK EXHAUST SYSTEM.Are there holes or loose bolts
on exhaust system?Repair exhaust
system.Go to step 2.
2 CHECK EGR VALVE.Is the EGR valve stuck? Replace the EGR
valve.Go to step 3.
3 CHECK AIR INTAKE SYSTEM.Are there holes, loose bolts or
disconnection of hose on air
intake system?Repair air intake
system.Go to step 4.
4 CHECK PURGE CONTROL SOLENOID
VALVE.Is the purge control solenoid
valve stuck?Replace the purge
control solenoid
valve.Go to step 5.
5 CHECK PCV VALVE.Is the PCV valve stuck? Replace the PCV
valve.Go to step 6.
6 CHECK FUEL PRESSURE.
Warning:
 Place “NO FIRE” signs near the working
area.
 Be careful not to spill fuel.
1) Release the fuel pressure.
(1) Disconnect the connector from fuel
pump relay.
(2) Start the engine and run it until it stalls.
(3) After the engine stalls, crank it for five
more seconds.
(4) Turn the ignition switch to OFF.
2) Connect the connector to fuel pump relay.
3) Disconnect the fuel delivery hose, and con-
nect the fuel pressure gauge.
4) Install the fuel filler cap.
5) Start the engine and idle while gear posi-
tion is neutral.
6) Measure the fuel pressure while discon-
necting pressure regulator vacuum hose from
intake manifold.
Warning:
Release fuel pressure before removing the
fuel pressure gauge.
NOTE:
If fuel pressure does not increase, squeeze fuel
return hose 2 to 3 times, then measure fuel
pressure again.Is measured value 284 — 314
kPa (2.9 — 3.2 kg/cm
2, 41 —
46 psi)?Go to step 7.Repair the follow-
ing items.
Fuel pressure is
too high:
 Clogged fuel
return line or
bent hose
Fuel pressure is
too low:
 Improper fuel
pump discharge
 Clogged fuel
supply line

EN(H4SO)-142
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AF:DTC P0304 CYLINDER 4 MISFIRE DETECTED
DTC DETECTING CONDITION:
 Two consecutive driving cycles with fault
 Immediately at fault recognition (A misfire which could damage catalyst occurs.)
TROUBLE SYMPTOM:
 Engine stalls
 Erroneous idling
 Rough driving
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
WIRING DIAGRAM:
EN-02383
B21
12345678910111213141516
E6E17
E5E16
12
12121212
2223348
91101112
ECM
B134
E5E16E6E17
B21
E2
FUEL INJECTOR
No. 1FUEL INJECTOR
No. 2FUEL INJECTOR
No. 3FUEL INJECTOR
No. 4
BATTERY
F44B61
SBF-5
B47 MAIN RELAY
12
35
46
B47
34
12
56
F44
12345678
B134
1234567891011121314151617181920212223242526272829303132333435
LHDLHD
RHDRHD
7

EN(H4SO)-148
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AG:DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW INPUT (BANK 1 OR SINGLE
SENSOR)
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
 Poor driving performance
 Knocking occurs.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
WIRING DIAGRAM:
EN-00272
1627
KNOCK
SENSOR
16
2
ECM B135
B22
E3
E14
E14
12
B22
125678
131415169101112
34
17181920
B135
567
82 1
94
310
24 22 23 251112131415
26 27
281617181920 21

EN(H4SO)-150
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AH:DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE
SENSOR)
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
 Poor driving performance
 Knocking occurs.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
WIRING DIAGRAM:
EN-00272
1627
KNOCK
SENSOR
16
2
ECM B135
B22
E3
E14
E14
12
B22
125678
131415169101112
34
17181920
B135
567
82 1
94
310
24 22 23 251112131415
26 27
281617181920 21

EN(H4SO)-152
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AI: DTC P0335 CRANKSHAFT POSITION SENSOR “A” CIRCUIT
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
 Engine stalls.
 Failure of engine to start
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
WIRING DIAGRAM:
EN-00273
12
1917
1728
B22
E3
E10
B22
E10
12
B135ECM CRANKSHAFT
POSITION
SENSOR
125678
131415169101112
34
17181920
6
B135
567
82 1
94
310
24 22 23 251112131415
26 27
281617181920 21

EN(H4SO)-154
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AJ:DTC P0336 CRANKSHAFT POSITION SENSOR “A” CIRCUIT RANGE/PER-
FORMANCE
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
 Engine stalls
 Failure of engine to start
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
WIRING DIAGRAM:
EN-00273
12
1917
1728
B22
E3
E10
B22
E10
12
B135ECM CRANKSHAFT
POSITION
SENSOR
125678
131415169101112
34
17181920
6
B135
567
82 1
94
310
24 22 23 251112131415
26 27
281617181920 21

EN(H4SO)-156
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AK:DTC P0340 CAMSHAFT POSITION SENSOR “A” CIRCUIT (BANK 1 OR SIN-
GLE SENSOR)
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
 Engine stalls.
 Failure of engine to start
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
WIRING DIAGRAM:
EN-00274
B22
E15
12
125678
131415169101112
34
17181920
12
2018
1828
B22
E3
E15
B135ECM CAMSHAFT
POSITION
SENSOR
7
B135
567
82 1
94
310
24 22 23 251112131415
26 27
281617181920 21

EN(H4SO)-158
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AL:DTC P0341 CAMSHAFT POSITION SENSOR “A” CIRCUIT RANGE/PERFOR-
MANCE (BANK 1 OR SINGLE SENSOR)
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
 Engine stalls
 Failure of engine to start
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
WIRING DIAGRAM:
EN-00274
B22
E15
12
125678
131415169101112
34
17181920
12
2018
1828
B22
E3
E15
B135ECM CAMSHAFT
POSITION
SENSOR
7
B135
567
82 1
94
310
24 22 23 251112131415
26 27
281617181920 21

EN(H4SO)-185
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AW:DTC P0503 VEHICLE SPEED SENSOR CIRCUIT HIGH INPUT
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
WIRING DIAGRAM:
EN-02395
i10
BATTERY
12
10
ECM COMBINATION
METER
VEHICLE
SPEED
SENSOR
3
12
B17
B137
17
TCMB56
IGNITION
RELAY
No. 5
B225
B21
E216
MTATB17
123
B21
123
4
56
78
9
1011 12
1314 15 16B62
B:
B56
1234
10 11 12
19 20 21135614 1578916 17 18
22 23 24
112
B225
10111213
1415161718
1920212223
2425262728
2930313233
3435363738
12
934
56
78
i10
123456789101112131415161718192021222324252627282930
B37
34 12 8910 11
12 13 14 15 16 17 18 19 20 21 22 23 24567
F45
B137
4
1
53
2618 15 167891011
17 19
20121314
F45
B38i3
B37i2
18
LHD
LHDRHD
RHD
RHD
RHD
LHDLHD
7B38
219
32
1234 5610 11 12 13 14 15716
23 3019 20
22 26 27 28 29817
24 3118
25
C:
*
1*
1 LHD MODEL : 9
RHD MODEL : 37*
2 LHD MODEL : 10
RHD MODEL : 38*
12345678910111213141516
B:C:

EN(H4SO)-194
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BA:DTC P0519 IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE)
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Engine keeps running at higher revolution than specified idling revolution.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode tion Mode.>.
WIRING DIAGRAM:
EN-02396
B137
B135
B134
B21
123
4
56
78
9
1011 12
1314 15 16
EE
B47
E7
2 5
1 4 3 6
B21B61F44
E2
B22
E3
B21
E2
6
4
5
3
2
1
1
2 A6 A20 A19A5
B21 D14A74
1 3
15
16
SBF-5BATTERY MEIN RELAY
IDLE
AIR CONTROL
SOLENOID
VALVE
A:
B134
B:
B135
D:
B137ECM
B47
F44
E7
3412
56
13
4562
B22
125678
131415169101112
34
17181920
7
12345678
4
1
53
2618 15 167891011
17 19
20121314
567
82 1
94
310
24 22 23 251112131415
26 27
281617181920 21
1234567891011121314151617181920212223242526272829303132333435
LHDLHD
RHDRHD
A: B:
D: