SUBARU FORESTER 2004 Service Repair Manual

EN(H4DOTC)-71
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
F: FUEL INJECTOR CIRCUIT
CAUTION:
 Check or repair only faulty parts.
 After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4DOTC)-47,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC)-40, Inspection
Mode.>.
WIRING DIAGRAM:
LHD model
EN-02318
BATTERY
FUEL INJECTORS MAIN RELAY
E#4
1 2
SBF-5
#3
1
2
#2
1
2
F60
#1
1 2
1
9
10
11
12
6
7
8
9
6
5
4
3
1
7
12123
4
56
78
9
1011 12
1314 15 16
6
4
5
3
2
1
F60
F74
B136F74
B200
E5
E5
E3
E6
E6
E16
E16
E17
F44
F2
B100
B47
B61F44
E17
12345678
F2B47
34
12
56
56
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 3534 12 8910 11
12 13 14 15 16 17 18 19 20 21 22 23 2456 7
1234 5678910 11 12 13 14 15 16 17 18 19 20
B136
ECM

EN(H4DOTC)-72
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
RHD model
EN-02319
BATTERY
FUEL INJECTORS MAIN RELAY
E#4
1 2
SBF-5
#3
1
2
#2
1 2
#1
1
2
1
9
10
11
12
12
12
7
8956 3410 11 12
19 20 2113 14 1516
17 1822
23
24123
4
56
78
9
1011 12
1314 15 16
6
4
5
3
2
1
B21
B21B136E5
E5
F2
E6
E6
E16
E16
E17
B47
E17
6
5
4
3
B136ECM
B47
34
12
56

EN(H4DOTC)-73
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
Step Check Yes No
1 CHECK OPERATION OF EACH FUEL INJEC-
TOR.
While cranking the engine, check that each
fuel injector emits operating sound.Use a
sound scope or attach a screwdriver to the
injector for this check.Does the fuel pump produce
operating sound?Check the fuel
pressure. <Ref. to
ME(H4DOTC)-36,
INSPECTION,
Fuel Pressure.>Go to step 2.
2 CHECK POWER SUPPLY TO EACH FUEL
INJECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from fuel injector.
3) Turn the ignition switch to ON.
4) Measure the power supply voltage between
fuel injector terminal and engine ground.
Connector & terminal
#1 (E5) No. 2 (+) — Engine ground (
−):
#2 (E16) No. 2 (+) — Engine ground (
−):
#3 (E6) No. 2 (+) — Engine ground (
−):
#4 (E17) No. 2 (+) — Engine ground (
−):Is the voltage more than 10 V? Go to step 3.Repair the har-
ness and connec-
tor.
N
OTE:
In this case repair
the following:
 Open circuit in
harness between
main relay and fuel
injector connector
 Poor contact in
main relay connec-
tor
 Poor contact in
coupling connector
 Poor contact in
fuel injector con-
nector
3 CHECK HARNESS BETWEEN ECM AND
FUEL INJECTOR CONNECTOR.
1) Disconnect the connector from ECM.
2) Measure the resistance of harness
between ECM and fuel injector connector.
Connector & terminal
(B136) No. 6 — (E5) No. 1:
(B136) No. 5 — (E16) No. 1:
(B136) No. 4 — (E6) No. 1:
(B136) No. 3 — (E6) No. 1:Is the resistance less than 1
Ω?Go to step 4.Repair the har-
ness and connec-
tor.
NOTE:
In this case repair
the following:
 Open circuit in
harness between
ECM and fuel
injector connector
 Poor contact in
coupling connector
4 CHECK HARNESS BETWEEN ECM AND
FUEL INJECTOR CONNECTOR.
Measure the resistance of harness between
ECM and fuel injector connector.
Connector & terminal
(B136) No. 6 — Chassis ground:
(B136) No. 5 — Chassis ground:
(B136) No. 4 — Chassis ground:
(B136) No. 3 — Chassis ground:Is the resistance less than 1
Ω?Repair ground
short circuit in har-
ness between
ECM and fuel
injector connector.Go to step 5.
5 CHECK EACH FUEL INJECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance between each fuel
injector terminals.
Te r m i n a l s
No. 1 — No. 2:Is the resistance 5 — 20 Ω? Go to step 6.Replace the faulty
fuel injector.
6 CHECK POOR CONTACT.
Check poor contact in ECM connector.Is there poor contact in ECM
connector?Repair the poor
contact in ECM
connector.Inspection using
“General Diagnos-
tic Table” <Ref. to
EN(H4DOTC)-
295, INSPEC-
TION, General
Diagnostic Table.>

EN(H4DOTC)-74
ENGINE (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
18.List of Diagnostic Trouble Code (DTC)
A: LIST
DTC Item NOTE
P0011 A Camshaft Position-Timing Over-
Advanced or System Performance
(Bank 1)<Ref. to EN(H4DOTC)-80, DTC P0011 “A” CAMSHAFT POSITION - TIMING
OVER - ADVANCED OR SYSTEM PERFORMANCE (BANK 1), Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
P0021 A Camshaft Position-Timing Over-
Advanced or System Performance
(Bank 2)<Ref. to EN(H4DOTC)-81, DTC P0021 “A” CAMSHAFT POSITION - TIMING
OVER - ADVANCED OR SYSTEM PERFORMANCE (BANK 2), Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
P0030 HO2S Heater Control Circuit (Bank
1 Sensor 1)<Ref. to EN(H4DOTC)-82, DTC P0031 HO2S HEATER CONTROL CIRCUIT
LOW (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0031 HO2S Sensor Circuit Low Voltage
(Bank 1 Sensor 1)<Ref. to EN(H4DOTC)-84, DTC P0031 HO2S HEATER CONTROL CIRCUIT
LOW (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0032 HO2S Sensor Circuit High Voltage
(Bank 1 Sensor 1)<Ref. to EN(H4DOTC)-87, DTC P0032 HO2S HEATER CONTROL CIRCUIT
HIGH (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0037 HO2S Sensor Circuit Low Voltage
(Bank 1 Sensor 2)<Ref. to EN(H4DOTC)-89, DTC P0037 HO2S HEATER CONTROL CIRCUIT
LOW (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0038 HO2S Sensor Circuit High Voltage
(Bank 1 Sensor 2)<Ref. to EN(H4DOTC)-92, DTC P0038 HO2S HEATER CONTROL CIRCUIT
HIGH (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0068 Manifold Pressure Sensor Range/
Performance<Ref. to EN(H4DOTC)-94, DTC P0068 MANIFOLD PRESSURE SENSOR
RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0101 Mass or Volume Air Flow Circuit
Range/Performance<Ref. to EN(H4DOTC)-97, DTC P0101 MASS OR VOLUME AIR FLOW CIR-
CUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0102 Mass or Volume Air Flow Circuit
Low Input<Ref. to EN(H4DOTC)-99, DTC P0102MASS OR VOLUME AIR FLOW CIR-
CUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0103 Mass or Volume Air Flow Circuit
High Input<Ref. to EN(H4DOTC)-102, DTC P0103 MASS OR VOLUME AIR FLOW
CIRCUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0107 Manifold Absolute Pressure/Baro-
metric Pressure Circuit Low Input<Ref. to EN(H4DOTC)-104, DTC P0107 MANIFOLD ABSOLUTE PRES-
SURE/BAROMETRIC PRESSURE CIRCUIT LOW INPUT, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
P0108 Manifold Absolute Pressure/Baro-
metric Pressure Circuit High Input<Ref. to EN(H4DOTC)-107, DTC P0108 INTAKE AIR PRESSURE SENSOR
CIRCUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0111 Intake Air Temperature Circuit
Range/Performance<Ref. to EN(H4DOTC)-110, DTC P0111 INTAKE AIR TEMPERATURE CIR-
CUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0112 Intake Air Temperature Circuit Low
Input<Ref. to EN(H4DOTC)-112, DTC P0112 INTAKE AIR TEMPERATURE CIR-
CUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0113 Manifold Absolute Pressure/Baro-
metric Pressure Circuit High Input<Ref. to EN(H4DOTC)-114, DTC P0113 INTAKE AIR TEMPERATURE CIR-
CUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0117 Engine Coolant Temperature Cir-
cuit Low Input<Ref. to EN(H4DOTC)-117, DTC P0117 ENGINE COOLANT TEMPERA-
TURE CIRCUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0118 Engine Coolant Temperature Cir-
cuit High Input<Ref. to EN(H4DOTC)-119, DTC P0118 ENGINE COOLANT TEMPERA-
TURE CIRCUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

EN(H4DOTC)-75
ENGINE (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
P0121 Throttle/Pedal Position Sensor/
Switch “A” Circuit Range/Perfor-
mance<Ref. to EN(H4DOTC)-122, DTC P0121 THROTTLE/PEDAL POSITION
SENSOR/SWITCH “A” CIRCUIT RANGE/PERFORMANCE, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
P0122 Throttle/Pedal Position Sensor/
Switch “A” Circuit Low Input<Ref. to EN(H4DOTC)-124, DTC P0122 THROTTLE/PEDAL POSITION
SENSOR/SWITCH “A” CIRCUIT LOW INPUT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0123 Throttle/Pedal Position Sensor/
Switch “A” Circuit High Input<Ref. to EN(H4DOTC)-128, DTC P0123 THROTTLE/PEDAL POSITION
SENSOR/SWITCH “A” CIRCUIT HIGH INPUT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0125 Insufficient Coolant Temperature
For Closed Loop Fuel Control<Ref. to EN(H4DOTC)-131, DTC P0125 INSUFFICIENT COOLANT TEM-
PERATURE FOR CLOSED LOOP FUEL CONTROL, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
P0129 Barometric Pressure Too Low <Ref. to EN(H4DOTC)-132, DTC P0129 BAROMETRIC PRESSURE TOO
LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0131 O
2 Sensor Circuit Low Voltage
(Bank 1 Sensor 1)<Ref. to EN(H4DOTC)-133, DTC P0131 O2 SENSOR CIRCUIT LOW VOLT-
AGE (BANK 1 SENSOR1), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0132 O
2 Sensor Circuit High Voltage
(Bank 1 Sensor 1)<Ref. to EN(H4DOTC)-135, DTC P0132 O2 SENSOR CIRCUIT HIGH
VOLTAGE (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0133 O
2 Sensor Circuit Slow Response
(Bank 1 Sensor 1)<Ref. to EN(H4DOTC)-137, DTC P0133 O2 SENSOR CIRCUIT SLOW
RESPONSE (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0134 O
2 Sensor Circuit No Activity
Detected (Bank 1 Sensor 1)<Ref. to EN(H4DOTC)-139, DTC P0134 O2 SENSOR CIRCUIT NO ACTIV-
ITY DETECTED (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
P0137 O
2 Sensor Circuit Low Voltage
(Bank 1 Sensor 2)<Ref. to EN(H4DOTC)-141, DTC P0137 O2 SENSOR CIRCUIT LOW VOLT-
AGE (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0138 O
2 Sensor Circuit High Voltage
(Bank 1 Sensor 2)<Ref. to EN(H4DOTC)-144, DTC P0138 O2 SENSOR CIRCUIT HIGH
VOLTAGE (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0139 O
2 Sensor Circuit Slow Response
(Bank 1 Sensor 2)<Ref. to EN(H4DOTC)-147, DTC P0139 O2 SENSOR CIRCUIT SLOW
RESPONSE (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0171 System Too Lean (Bank 1) <Ref. to EN(H4DOTC)-148, DTC P0171 SYSTEM TOO LEAN (BANK 1),
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0172 System Too Rich (Bank 1) <Ref. to EN(H4DOTC)-149, DTC P0172 SYSTEM TOO RICH (BANK 1),
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0230 Fuel Pump Primary Circuit <Ref. to EN(H4DOTC)-152, DTC P0230 FUEL PUMP PRIMARY CIRCUIT,
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0244 Turbo/Super Charger Wastegate
Solenoid “A” Range/Performance<Ref. to EN(H4DOTC)-156, DTC P0244 TURBO/SUPER CHARGER
WASTEGATE SOLENOID “A” RANGE/PERFORMANCE, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
P0245 Turbo/Super Charger Wastegate
Solenoid “A” Low<Ref. to EN(H4DOTC)-158, DTC P0245 TURBO/SUPER CHARGER
WASTEGATE SOLENOID “A” LOW, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0246 Turbo/Super Charger Wastegate
Solenoid “A” High<Ref. to EN(H4DOTC)-160, DTC P0246 TURBO/SUPER CHARGER
WASTEGATE SOLENOID “A” HIGH, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0301 Cylinder 1 Misfire Detected <Ref. to EN(H4DOTC)-162, DTC P0301 CYLINDER 1 MISFIRE
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0302 Cylinder 2 Misfire Detected <Ref. to EN(H4DOTC)-162, DTC P0302 CYLINDER 2 MISFIRE
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0303 Cylinder 3 Misfire Detected <Ref. to EN(H4DOTC)-162, DTC P0303 CYLINDER 3 MISFIRE
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> DTC Item NOTE

EN(H4DOTC)-76
ENGINE (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
P0304 Cylinder 4 Misfire Detected <Ref. to EN(H4DOTC)-163, DTC P0304 CYLINDER 4 MISFIRE
DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0327 Knock Sensor 1 Circuit Low Input
(Bank 1 or Single Sensor)<Ref. to EN(H4DOTC)-169, DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW
INPUT (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
P0328 Knock Sensor 1 Circuit High Input
(Bank 1 or Single Sensor)<Ref. to EN(H4DOTC)-171, DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH
INPUT (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
P0335 Crankshaft Position Sensor “A” Cir-
cuit<Ref. to EN(H4DOTC)-173, DTC P0335 CRANKSHAFT POSITION SEN-
SOR “A” CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0336 Crankshaft Position Sensor “A” Cir-
cuit Range/Performance<Ref. to EN(H4DOTC)-175, DTC P0336 CRANKSHAFT POSITION SEN-
SOR “A” CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0340 Camshaft Position Sensor “A” Cir-
cuit (Bank 1 or Single Sensor)<Ref. to EN(H4DOTC)-177, DTC P0340 CAMSHAFT POSITION SENSOR
“A” CIRCUIT (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0341 Camshaft Position Sensor “A” Cir-
cuit Range/Performance (Bank 1 or
Single Sensor)<Ref. to EN(H4DOTC)-179, DTC P0341 CAMSHAFT POSITION SENSOR
“A” CIRCUIT RANGE/PERFORMANCE (BANK 1 OR SINGLE SENSOR),
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0365 Camshaft Position Sensor “B” Cir-
cuit (Bank 1)<Ref. to EN(H4DOTC)-182, DTC P0365 CAMSHAFT POSITION SENSOR
“B” CIRCUIT (BANK 1), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0390 Camshaft Position Sensor “B” Cir-
cuit (Bank 2)<Ref. to EN(H4DOTC)-184, DTC P0390 CAMSHAFT POSITION SENSOR
“B” CIRCUIT (BANK 2), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0420 Catalyst System Efficiency Below
Threshold (Bank 1)<Ref. to EN(H4DOTC)-186, DTC P0420 CATALYST SYSTEM EFFICIENCY
BELOW THRESHOLD (BANK 1), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0458 Evaporative Emission Control Sys-
tem Purge Control Valve Circuit
Low<Ref. to EN(H4DOTC)-188, DTC P0458 EVAPORATIVE EMISSION CON-
TROL SYSTEM PURGE CONTROL VALVE CIRCUIT LOW, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
P0459 Evaporative Emission Control Sys-
tem Purge Control Valve Circuit
High<Ref. to EN(H4DOTC)-190, DTC P0459 EVAPORATIVE EMISSION CON-
TROL SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
P0461 Fuel Level Sensor Circuit Range/
Performance<Ref. to EN(H4DOTC)-192, DTC P0461 FUEL LEVEL SENSOR CIRCUIT
RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0462 Fuel Level Sensor Circuit Low
Input<Ref. to EN(H4DOTC)-194, DTC P0462 FUEL LEVEL SENSOR CIRCUIT
LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0463 Fuel Level Sensor Circuit High
Input<Ref. to EN(H4DOTC)-197, DTC P0463 FUEL LEVEL SENSOR CIRCUIT
HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0464 Fuel Level Sensor Circuit Intermit-
tent<Ref. to EN(H4DOTC)-200, DTC P0464 FUEL LEVEL SENSOR CIRCUIT
INTERMITTENT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0483 Cooling Fan Rationality Check <Ref. to EN(H4DOTC)-202, DTC P0483 COOLING FAN RATIONALITY
CHECK, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0502 Vehicle Speed Sensor Circuit Low
Input<Ref. to EN(H4DOTC)-205, DTC P0502 VEHICLE SPEED SENSOR CIR-
CUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0503 Vehicle Speed Sensor Intermittent/
Erratic/High<Ref. to EN(H4DOTC)-207, DTC P0503 VEHICLE SPEED SENSOR CIR-
CUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0506 Idle Control System RPM Lower
Than Expected<Ref. to EN(H4DOTC)-209, DTC P0506 IDLE CONTROL SYSTEM RPM
LOWER THAN EXPECTED, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).> DTC Item NOTE

EN(H4DOTC)-77
ENGINE (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
P0507 Idle Control System RPM Higher
Than Expected<Ref. to EN(H4DOTC)-211, DTC P0507 IDLE CONTROL SYSTEM RPM
HIGHER THAN EXPECTED, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0508 Idle Control System Circuit Low <Ref. to EN(H4DOTC)-213, DTC P0508 IDLE CONTROL SYSTEM CIR-
CUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0509 Idle Control System Circuit High <Ref. to EN(H4DOTC)-215, DTC P0509 IDLE CONTROL SYSTEM CIR-
CUIT HIGH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0512 Starter Request Circuit <Ref. to EN(H4DOTC)-217, DTC P0512 STARTER REQUEST CIRCUIT,
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0513 Incorrect Immobilizer Key <Ref. to IM-20, DTC P0513 INCORRECT IMMOBILIZER KEY, Diagnostics
Procedure with Diagnostic Trouble Code (DTC).>
P0519 Idle Control System Malfunction
(Fail-Safe)<Ref. to EN(H4DOTC)-219, DTC P0519 IDLE CONTROL SYSTEM MAL-
FUNCTION (FAIL-SAFE), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0545 Exhaust Gas Temperature Sensor
Circuit Low - Bank 1<Ref. to EN(H4DOTC)-221, DTC P0545 EXHAUST GAS TEMPERATURE
SENSOR CIRCUIT LOW - BANK 1, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>
P0546 Exhaust Gas Temperature Sensor
Circuit High - Bank 1<Ref. to EN(H4DOTC)-223, DTC P0546 EXHAUST GAS TEMPERATURE
SENSOR HIGH - BANK 1, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0558 Generator Circuit Low Input <Ref. to EN(H4DOTC)-225, DTC P0558 GENERATOR CIRCUIT LOW
INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0559 Generator Circuit High Input <Ref. to EN(H4DOTC)-226, DTC P0559 GENERATOR CIRCUIT HIGH
INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0600 Serial Communication Link <Ref. to EN(H4DOTC)-228, DTC P0600 SERIAL COMMUNICATION LINK,
Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0604 Internal Control Module Random
Access Memory (RAM) Error<Ref. to EN(H4DOTC)-230, DTC P0604 INTERNAL CONTROL MODULE
READ ONLY MEMORY (ROM) ERROR, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
P0691 Cooling Fan 1 Control Circuit Low <Ref. to EN(H4DOTC)-232, DTC P0691 COOLING FAN 1 CONTROL CIR-
CUIT LOW, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0692 Cooling Fan 1 Control Circuit High <Ref. to EN(H4DOTC)-236, DTC P0692 COOLING FAN 1 CONTROL CIR-
CUIT HIGH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0700 Transmission Control System (MIL
Request)<Ref. to EN(H4DOTC)-238, DTC P0700 TRANSMISSION CONTROL SYS-
TEM (MIL REQUEST), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0851 Neutral Switch Input Circuit Low <Ref. to EN(H4DOTC)-239, DTC P0851 NEUTRAL SWITCH INPUT CIR-
CUIT LOW (AT MODEL), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).> or <Ref. to EN(H4DOTC)-241, DTC P0851 NEUTRAL
SWITCH INPUT CIRCUIT LOW (MT MODEL), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0852 Neutral Switch Input Circuit High <Ref. to EN(H4DOTC)-243, DTC P0852 NEUTRAL SWITCH INPUT CIR-
CUIT HIGH (AT MODEL), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).> or <Ref. to EN(H4DOTC)-246, DTC P0852 NEUTRAL
SWITCH INPUT CIRCUIT HIGH (MT MODEL), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P1086 Tumble Generated Valve Position
Sensor 2 Circuit Low<Ref. to EN(H4DOTC)-248, DTC P1086 TUMBLE GENERATED VALVE
POSITION SENSOR 2 CIRCUIT LOW, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
P1087 Tumble Generated Valve Position
Sensor 2 Circuit High<Ref. to EN(H4DOTC)-252, DTC P1087 TUMBLE GENERATED VALVE
POSITION SENSOR 2 CIRCUIT HIGH, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
P1088 Tumble Generated Valve Position
Sensor 1 Circuit Low<Ref. to EN(H4DOTC)-255, DTC P1088 TUMBLE GENERATED VALVE
POSITION SENSOR 1 CIRCUIT LOW, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).> DTC Item NOTE

EN(H4DOTC)-78
ENGINE (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
P1089 Tumble Generated Valve Position
Sensor 1 Circuit High<Ref. to EN(H4DOTC)-259, DTC P1089 TUMBLE GENERATED VALVE
POSITION SENSOR 1 CIRCUIT HIGH, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
P1090 Tumble Generated Valve System 1
(Valve Open)<Ref. to EN(H4DOTC)-262, DTC P1090 TUMBLE GENERATED VALVE
SYSTEM 1 (VALVE OPEN), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P1091 Tumble Generated Valve System 1
(Valve Close)<Ref. to EN(H4DOTC)-262, DTC P1091 TUMBLE GENERATED VALVE
SYSTEM 1 (VALVE CLOSE), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P1092 Tumble Generated Valve System 2
(Valve Open)<Ref. to EN(H4DOTC)-263, DTC P1092 TUMBLE GENERATED VALVE
SYSTEM 2 (VALVE OPEN), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P1093 Tumble Generated Valve System 2
(Valve Close)<Ref. to EN(H4DOTC)-263, DTC P1093 TUMBLE GENERATED VALVE
SYSTEM 2 (VALVE CLOSE), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P1094 Tumble Generated Valve Signal 1
Circuit Malfunction (Open)<Ref. to EN(H4DOTC)-264, DTC P1094 TUMBLE GENERATED VALVE
SIGNAL 1 CIRCUIT MALFUNCTION (OPEN), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P1095 Tumble Generated Valve Signal 1
Circuit Malfunction (Short)<Ref. to EN(H4DOTC)-266, DTC P1095 TUMBLE GENERATED VALVE
SIGNAL 1 CIRCUIT MALFUNCTION (SHORT), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P1096 Tumble Generated Valve Signal 2
Circuit Malfunction (Open)<Ref. to EN(H4DOTC)-268, DTC P1096 TUMBLE GENERATED VALVE
SIGNAL 2 CIRCUIT MALFUNCTION (OPEN), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P1097 Tumble Generated Valve Signal 2
Circuit Malfunction (Short)<Ref. to EN(H4DOTC)-270, DTC P1097 TUMBLE GENERATED VALVE
SIGNAL 2 CIRCUIT MALFUNCTION (SHORT), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P1110 Atmospheric Pressure Sensor Cir-
cuit Malfunction (Low Input)<Ref. to EN(H4DOTC)-271, DTC P1110 ATMOSPHERIC PRESSURE SEN-
SOR CIRCUIT MALFUNCTION (LOW INPUT), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P1111 Atmospheric Pressure Sensor Cir-
cuit Malfunction (High Input)<Ref. to EN(H4DOTC)-271, DTC P1111 ATMOSPHERIC PRESSURE SEN-
SOR CIRCUIT MALFUNCTION (HIGH INPUT), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P1152 O
2 Sensor Circuit Range/Perfor-
mance (Low) (Bank 1 Sensor 1)<Ref. to EN(H4DOTC)-272, DTC P1152 O2 SENSOR CIRCUIT RANGE/
PERFORMANCE (LOW) (BANK 1 SENSOR 1), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P1153 O
2 Sensor Circuit Range/Perfor-
mance (High) (Bank 1 Sensor 1)<Ref. to EN(H4DOTC)-274, DTC P1153 O2 SENSOR CIRCUIT RANGE/
PERFORMANCE (HIGH) (BANK 1 SENSOR 1), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P1301 Misfire Detected (High Tempera-
ture Exhaust Gas)<Ref. to EN(H4DOTC)-276, DTC P1301 MISFIRE DETECTED (HIGH TEM-
PERATURE EXHAUST GAS), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P1312 Exhaust Gas Temperature Sensor
Malfunction<Ref. to EN(H4DOTC)-278, DTC P1312 INTAKE AIR TEMPERATURE CIR-
CUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P1518 Starter Switch Circuit Low Input <Ref. to EN(H4DOTC)-280, DTC P1518 STARTER SWITCH CIRCUIT LOW
INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P1544 Exhaust Gas Temperature Too
High<Ref. to EN(H4DOTC)-282, DTC P1544 EXHAUST GAS TEMPERATURE
TOO HIGH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P1560 Back-Up Voltage Circuit Malfunc-
tion<Ref. to EN(H4DOTC)-284, DTC P1560 BACK-UP VOLTAGE CIRCUIT
MALFUNCTION, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P1570 ANTENNA <Ref. to IM-21, DTC P1570 ANTENNA, Diagnostics Procedure with Diag-
nostic Trouble Code (DTC).>
P1571 Reference Code Incompatibility <Ref. to IM-15, DTC P1571 REFERENCE CODE INCOMPATIBILITY, Diag-
nostics Procedure with Diagnostic Trouble Code (DTC).> DTC Item NOTE

EN(H4DOTC)-79
ENGINE (DIAGNOSTIC)
List of Diagnostic Trouble Code (DTC)
P1572 IMM Circuit Failure (Except
Antenna Circuit)<Ref. to IM-19, DTC P1574 KEY COMMUNICATION FAILURE, Diagnostics
Procedure with Diagnostic Trouble Code (DTC).>
P1574 Key Communication Failure <Ref. to IM-19, DTC P1574 KEY COMMUNICATION FAILURE, Diagnostics
Procedure with Diagnostic Trouble Code (DTC).>
P1576 EGI Control Module EEPROM <Ref. to IM-20, DTC P1576 EGI CONTROL MODULE EEPROM, Diagnos-
tics Procedure with Diagnostic Trouble Code (DTC).>
P1577 IMM Control Module EEPROM <Ref. to IM-20, DTC P1577 IMM CONTROL MODULE EEPROM, Diagnos-
tics Procedure with Diagnostic Trouble Code (DTC).>
P2088 OCV Solenoid Valve Signal A Cir-
cuit Open (Bank 1)<Ref. to EN(H4DOTC)-287, DTC P2088 OCV SOLENOID VALVE SIGNAL A
CIRCUIT OPEN (BANK 1), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P2089 OCV Solenoid Valve Signal A Cir-
cuit Short (Bank 1)<Ref. to EN(H4DOTC)-289, DTC P2089 OCV SOLENOID VALVE SIGNAL A
CIRCUIT SHORT (BANK 1), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P2092 OCV Solenoid Valve Signal A Cir-
cuit Open (Bank 2)<Ref. to EN(H4DOTC)-291, DTC P2092 OCV SOLENOID VALVE SIGNAL A
CIRCUIT OPEN (BANK 2), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P2093 OCV Solenoid Valve Signal A Cir-
cuit Short (Bank 2)<Ref. to EN(H4DOTC)-293, DTC P2093 OCV SOLENOID VALVE SIGNAL A
CIRCUIT SHORT (BANK 2), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).> DTC Item NOTE

FUJI HEAVY INDUSTRIES LTD. G8080GE3
2004 FORESTER SERVICE MANUAL QUICK REFERENCE INDEX
ENGINE SECTION 2
This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair
of SUBARU vehicles.
This manual includes the procedures
for maintenance, disassembling, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance of experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping
their vehicle in optimum condition.
When replacement of parts during
repair work is needed, be sure to use
SUBARU genuine parts.
All information, illustration and specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.FUEL INJECTION (FUEL SYSTEM) FU(H4DOTC)
EMISSION CONTROL
(AUX. EMISSION CONTROL DEVICE)EC(H4DOTC)
INTAKE (INDUCTION) IN(H4DOTC)
MECHANICAL ME(H4DOTC)
EXHAUST EX(H4DOTC)
COOLING CO(H4DOTC)
LUBRICATION LU(H4DOTC)
SPEED CONTROL SYSTEM SP(H4DOTC)
IGNITION IG(H4DOTC)
STARTING/CHARGING SYSTEM SC(H4DOTC)
ENGINE (DIAGNOSTIC) EN(H4DOTC)