2004 SUBARU FORESTER steering

EN(H4DOTC)-25
ENGINE (DIAGNOSTIC)
Engine Control Module (ECM) I/O Signal
Sensor power supply B136 16 5 5 —
Oil flow
control
solenoid
valve RHSignal (+) B134 18ON: 10 — 13
OFF: 0ON: 13 — 14
OFF: 0—
Signal (−) B134 28 0 0 —
Oil flow
control
solenoid
valve LHSignal (+) B134 19ON: 10 — 13
OFF: 0ON: 13 — 14
OFF: 0—
Signal (−) B134 29 0 0 —
Ignition
control#1 B135 18 0 13 — 14 Waveform
#2 B135 17 0 13 — 14 Waveform
#3 B135 16 0 13 — 14 Waveform
#4 B135 15 0 13 — 14 Waveform
Fuel injec-
tor#1 B136 6 10 — 13 1 — 14 Waveform
#2 B136 5 10 — 13 1 — 14 Waveform
#3 B136 4 10 — 13 1 — 14 Waveform
#4 B136 3 10 — 13 1 — 14 Waveform
Idle air
control
solenoid
valveSignal B134 27 0 or 13 — 14 0 or 13 — 14 Waveform
Fuel pump
control unitDiagnosis
signalB137 28 10 — 13 13 — 14 Waveform
Control
signalB135 27 0 or 5 0 or 5 —
A/C relay control B135 33ON: 0.5, or less
OFF: 10 — 13ON: 0.5, or less
OFF: 13 — 14—
Radiator fan relay 1 con-
trolB135 25ON: 0.5, or less
OFF: 10 — 13ON: 0.5, or less
OFF: 13 — 14—
Radiator fan relay 2 con-
trolB135 24ON: 0.5, or less
OFF: 10 — 13ON: 0.5, or less
OFF: 13 — 14Model with A/C
Malfunction indicator
lightB134 17 — —Light “ON”: 1, or less
Light “OFF”: 10 — 14
Engine speed output B134 23 — 0 — 13, or more Waveform
Purge control solenoid
valveB134 14ON: 1, or less
OFF: 10 — 13ON: 1, or less
OFF: 13 — 14Wavefor m
Manifold
absolute
pressure
sensorSignal B136 22 1.7 — 2.4 1.1 — 1.6
— Pow er
supplyB136 16 5 5
GND
(sensors)B136 35 0 0
Fuel level sensor B136 20 0.12 — 4.75 0.12 — 4.75 —
Small light switch B137 12ON: 0
OFF: 10 — 13ON: 0
OFF: 13 — 14—
Blower fan switch B137 13ON: 0
OFF: 10 — 13ON: 0
OFF: 13 — 14—
Rear defogger switch B137 11ON: 0
OFF: 10 — 13ON: 0
OFF: 13 — 14—
Power steering oil pres-
sure switchB137 10 10 — 13ON: 0
OFF: 13 — 14—
Wiper switch B137 23ON: 10 — 13
OFF: 0ON: 13 — 14
OFF: 0— DESCRIPTION Connector No. Terminal No.Signal (V)
NOTE
Ignition SW ON
(engine OFF)Engine ON
(Idling)

EN(H4DOTC)-35
ENGINE (DIAGNOSTIC)
Subaru Select Monitor
NOTE:
For detailed operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MANUAL”.
5. READ CURRENT DATA FOR ENGINE (OBD MODE)
1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display screen, select the {Engine} and press the [YES] key.
3) Press the [YES] key after the information of engine type was displayed.
4) On the «Engine Diagnosis» display screen, select the {OBD System} and press the [YES] key.
5) On the «OBD Menu» screen, select the {Current Data Display/Save}, and then press the [YES] key.
6) On the «Data Display Menu» screen, select the {Data Display} and press the [YES] key.
7) Using the scroll key, move the display screen up or down until the desired data is shown.
 A list of the support data is shown in the following table.
Air conditioning signal A/C Compressor Signal ON or OFF
Radiator main fan relay signal Radiator Fan Relay #1 ON or OFF
Knocking signal Knocking Signal ON or OFF
Radiator sub fan relay signal Radiator Fan Relay #2 ON or OFF
Power steering switch signal P/S Switch ON or OFF
Engine torque control permission signal Torque Permission Signal ON or OFF
Rear oxygen sensor rich signal Rear Oxygen Rich Signal ON or OFF
Starter switch signal Starter Switch ON or OFF
Idle switch signal Idle Switch ON or OFF
Crankshaft position sensor signal Crankshaft Position Sig. ON or OFF
Camshaft position sensor signal Camshaft Position Sig. ON or OFF
Rear defogger switch signal Rear Defogger SW ON or OFF
Blower fan switch signal Blower Fan SW ON or OFF
Small light switch signal Light Switch ON or OFF
Tumble generated valve output signal TGV Output ON or OFF
Exhaust temperature signal Exhaust Gas Temperature°C
Estimated cumulative driving distance Odd Meter km
Roughness Monitor for #1 cylinder Roughness Monitor #1 —
Roughness Monitor for #2 cylinder Roughness Monitor #2 —
Roughness Monitor for #3 cylinder Roughness Monitor #3 —
Roughness Monitor for #4 cylinder Roughness Monitor #4 —
Wiper switch signal Wiper Switch ON or OFF
A/C middle pressure switch signal A/C Mid pressure switch ON or OFF
AT retard angle demand signal Retard Signal from AT ON or OFF
AT fuel cut demand signal Fuel Cut Signal from AT ON or OFF
Description Display Unit of measure
Number of diagnosis code Number of Diag. Code —
Condition of malfunction indicator light MI (MIL) ON or OFF
Monitoring test of misfire Misfire monitoring Complete or incomplete
Monitoring test of fuel system Fuel system monitoring Complete or incomplete
Monitoring test of comprehensive component Component monitoring Complete or incomplete
Test of catalyst Catalyst Diagnosis Complete or incomplete
Test of heating-type catalyst Heated catalyst No support
Test of evaporative emission purge control system Evaporative purge system No support
Test of secondary air system Secondary air system No support
Test of air conditioning system refrigerant A/C system refrigerant No support
Test of oxygen sensor Oxygen sensor Complete or incomplete
Test of oxygen sensor heater Oxygen Heater Diagnosis Complete or incomplete
Test of EGR system EGR system No supportRemarks Display Unit of measure

EN(H4DOTC)-37
ENGINE (DIAGNOSTIC)
Subaru Select Monitor
7. LED OPERATION MODE FOR ENGINE
1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display screen, select the {Engine} and press the [YES] key.
3) Press the [YES] key after the information of engine type was displayed.
4) On the «Engine Diagnosis» screen, select the {Current Data Display/Save}, and then press the [YES] key.
5) On the «Data Display» screen, select the {Data & LED Display} and press the [YES] key.
6) Using the scroll key, move the display screen up or down until the desired data is shown.
 A list of the support data is shown in the following table.
NOTE:
For detailed operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MANUAL”.
Description Display Message LED “ON” requirements
Ignition switch signal Ignition Switch ON or OFF When ignition switch is ON.
Test mode connector signal Test Mode Signal ON or OFF When test mode connector is connected.
Neutral position switch signal Neutral Position Switch ON or OFF When neutral position signal is entered.
Air conditioning switch signal A/C Switch ON or OFF When air conditioning switch is ON.
Air conditioning relay signal A/C Compressor Signal ON or OFF When air conditioning relay is in function.
Radiator main fan relay signal Radiator Fan Relay #1 ON or OFF When radiator main fan relay is in function.
Knocking signal Knocking Signal ON or OFF When knocking signal is input.
Radiator sub fan relay signal Radiator Fan Relay #2 ON or OFF When radiator sub fan relay is in function.
Engine torque control permission
signalTorque Control Permission ON or OFFWhen engine torque control permission sig-
nal is entered.
Rear oxygen sensor rich signalRear O
2 Rich Signal
ON or OFFWhen rear oxygen sensor mixture ratio is
rich.
Starter switch signal Starter Switch ON or OFF When starter switch signal is entered.
Idle switch signal Idle Switch ON or OFF When idle switch signal is entered.
Crankshaft position sensor signal Crankshaft Position Signal ON or OFFWhen crankshaft position sensor signal is
input.
Camshaft position sensor signal Camshaft Position Signal ON or OFFWhen camshaft position sensor signal is
entered.
Power steering switch signal P/S Switch ON or OFF When power steering switch is entered.
Rear defogger switch signal Rear Defogger Switch ON or OFF When rear defogger switch is ON.
Blower fan switch signal Blower Fan Switch ON or OFF When blower fan switch is ON.
Light switch signal Light Switch ON or OFF When small light switch is ON.
Wiper switch signal Wiper Switch ON or OFF When wiper switch is ON.
A/C middle pressure switch signal A/C Mid Pressure Switch ON or OFF When A/C switch is ON.
AT retard angle demand signal Retard Signal from AT ON or OFF When AT retard angle demand signal exists.
AT fuel cut demand signal Fuel Cut Signal from AT ON or OFF When AT fuel cut demand signal exists.
AT/MT identification signal AT Vehicle ID Signal ON or OFF For AT model
Tumble generated valve actuator
signalTGV Output ON or OFF When TGV actuator signal is output.
Tumble generated valve drive sig-
nalTGV DriveOPEN or
CLOSEWhen TGV moves and valve opens.

FU(H4DOTC 2.5)-14
FUEL INJECTION (FUEL SYSTEM)
Intake Manifold
3. Intake Manifold
A: REMOVAL
1) Release the fuel pressure.
FUEL PRESSURE, OPERATION, Fuel.>
2) Open the fuel filler flap lid and remove the fuel
filler cap.
3) Disconnect the ground cable from battery.
4) Lift up the vehicle.
5) Remove the under cover.
6) Drain the engine coolant about 3.02 (3.2 US qt,
2.6 Imp qt).
7) Remove the air cleaner upper cover and air in-
take boot. Cleaner.>
8) Remove the air cleaner element.
9) Remove the intercooler. 10, REMOVAL, Intercooler.>
10) Remove the coolant filler tank. CO(H4SO)-42, REMOVAL, Coolant Filler Tank.>
11) Remove the power steering pump.
(1) Remove the front side V-belt. ME(H4DOTC)-52, REMOVAL, V-belt.>(2) Disconnect the power steering switch con-
nector.
(3) Remove the bolts which secure the power
steering pipe brackets to the intake manifold.
NOTE:
Do not disconnect the power steering hose.
(4) Remove the bolts which secure the power
steering pump bracket.
(5) Remove the reservoir tank from the bracket
by pulling it upward.
FU-00009
FU-00016
FU-00017
FU-00018
FU-00019
FU-00020

FU(H4DOTC 2.5)-15
FUEL INJECTION (FUEL SYSTEM)
Intake Manifold
(6) Place the power steering pump on the right
side wheel apron.
12) Disconnect the emission hose from the PCV
valve.
13) Disconnect the engine coolant hoses from the
throttle body.
14) Disconnect the brake booster hose.15) Disconnect the pressure hose from the intake
duct.
16) Disconnect the engine harness connectors
from the bulkhead harness connectors.
17) Disconnect the connectors from the engine cool-
ant temperature sensor (A), oil pressure switch (B)
and crankshaft position sensor (C).
FU-00021
FU-00022
FU-01074
FU-00023
FU-00024
FU-00025
FU-00026
(A)
(B)
(C)
FU-00027

FU(H4DOTC 2.5)-18
FUEL INJECTION (FUEL SYSTEM)
Intake Manifold
 LH SIDE
8) Connect the engine harness connector to the
bulkhead harness connectors.
9) Connect the brake booster vacuum hose.10) Connect the engine coolant hoses to the throt-
tle body.
11) Connect the emission hose to the PCV valve.
12) Connect the pressure hose to the intake duct.
13) Install the power steering pump.
(1) Install the reservoir tank on the bracket.
FU-01310
(A)
FU-00025
FU-00026
FU-00023
FU-01074
FU-00022
FU-00024
FU-00020

FU(H4DOTC 2.5)-19
FUEL INJECTION (FUEL SYSTEM)
Intake Manifold
(2) Connect the connector to the power steering
pump switch.
(3) Install the power steering pump, and tighten
the bolts.
Tightening torque:
22 N·m (2.2 kgf-m, 15.9 ft-lb)
(4) Install the power steering pipe brackets on
the intake manifold RH.
(5) Install the front side V-belt. ME(H4DOTC)-52, INSTALLATION, V-belt.>
14) Install the coolant filler tank. 42, INSTALLATION, Coolant Filler Tank.>
15) Install the intercooler. 11, INSTALLATION, Intercooler.>
16) Install the air cleaner element.
17) Install the air cleaner upper cover and air intake
duct as a unit. TION, Air Cleaner.>18) Connect the connector to the fuel pump relay.
19) Connect the battery ground cable to battery.
20) Lift up the vehicle.
21) Install the under cover.
22) Fill the engine coolant. FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
C: DISASSEMBLY
1) Remove the fuel pipe protector RH.
2) Remove the engine ground terminal from the in-
take manifold.
FU-00017
FU-00019
FU-00018
ME-00649
FU-01040
FU-01041
FU-01042

EN(H4DOTC 2.5)-5
ENGINE (DIAGNOSTIC)
General Description
3. General Description
A: CAUTION
1) Airbag system wiring harness is routed near the
ECM, main relay and fuel pump relay.
CAUTION:
 All airbag system wiring harness and con-
nectors are all colored yellow. Do not use the
electrical test equipment on these circuits.
 Be careful not to damage the Airbag system
wiring harness when servicing the ECM, TCM,
main relay and fuel pump relay.
2) Never connect the battery in reverse polarity.
 The ECM will be destroyed immediately.
 The fuel injector and other part will be damaged.
3) Do not disconnect the battery terminals while the
engine is running.
 A large counter electromotive force will be gener-
ated in the generator, and this voltage may damage
electronic parts such as ECM, etc.
4) Before disconnecting the connectors of each
sensor and the ECM, be sure to turn OFF the igni-
tion switch.
5) Poor contact has been identified as a primary
cause of this problem. Measure the voltage or re-
sistance of individual sensor or all electrical control
modules using a tapered pin with a diameter of less
than 0.64 mm (0.025 in). Do not insert the pin more
than 5 mm (0.20 in) into the part.
6) Remove the ECM from the located position after
disconnecting two cables on battery.
 Otherwise, the ECM may be damaged.
CAUTION:
When replacing the ECM, be careful not to use
the wrong spec. ECM to avoid damaging the
fuel injection system.
7) Connectors to each sensor in the engine com-
partment and the harness connectors on the en-
gine side and body side are all designed to be
waterproof. However, take care not to allow water
to get into the connectors when washing the vehi-
cle, or when servicing the vehicle on a rainy day. 8) Use ECM mounting stud bolts on the body head
grounding point when measuring voltage and resis-
tance inside the passenger compartment.
9) Use engine ground terminal or engine proper as
the grounding point to the body when measuring
voltage and resistance in the engine compartment.
10) Every MFI-related part is a precision part. Do
not drop them.
11) Observe the following cautions when installing
a radio in MFI equipped models.
CAUTION:
 The antenna must be kept as far apart as pos-
sible from the control unit.
(The ECM is located under the steering column,
inside of the instrument panel lower trim panel.)
 The antenna feeder must be placed as far
apart as possible from the ECM and MFI har-
ness.
 Carefully adjust the antenna for correct match-
ing.
 When mounting a large power type radio, pay
special attention to the three items above men-
tioned.
 Incorrect installation of the radio may affect
the operation of the ECM.
12) Before disconnecting the fuel hose, disconnect
the fuel pump connector and crank the engine for
more than five seconds to release pressure in the
fuel system. If engine starts during this operation,
run it until it stops.
(A) Stud bolt
EN-00069
(A)
EN-01201