1999 SUBARU LEGACY Service Repair Manual

2) Disconnect connector from camshaft position
sensor.
S2M0183
3) Remove camshaft position sensor from cam-
shaft support LH.
S2M0184
4) Installation is in the reverse order of removal.
Tightening torque:
6.4
±0.5 N´m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
11. Pressure Sensor (AT
model)
A: REMOVAL AND INSTALLATION
1) Disconnect connector from pressure sensor.
2) Disconnect hose from pressure sensor.
3) Remove pressure sensor from bracket.
4) Installation is in the reverse order of removal.
Tightening torque:
6.4
±0.5 N´m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
B2M0776
74
2-7[W11A0]SERVICE PROCEDURE
11. Pressure Sensor (AT model)

2) Disconnect connector from camshaft position
sensor.
S2M0183
3) Remove camshaft position sensor from cam-
shaft support LH.
S2M0184
4) Installation is in the reverse order of removal.
Tightening torque:
6.4
±0.5 N´m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
11. Pressure Sensor (AT
model)
A: REMOVAL AND INSTALLATION
1) Disconnect connector from pressure sensor.
2) Disconnect hose from pressure sensor.
3) Remove pressure sensor from bracket.
4) Installation is in the reverse order of removal.
Tightening torque:
6.4
±0.5 N´m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
B2M0776
74
2-7[W11A0]SERVICE PROCEDURE
11. Pressure Sensor (AT model)

12. Idle Air Control Solenoid
Valve
A: REMOVAL AND INSTALLATION
1. 2200 cc CALIFORNIA SPEC. VEHICLES
1) Disconnect battery ground cable.
B2M1723
2) Disconnect connector from idle air control sole-
noid valve.
B2M2363
3) Disconnect air by-pass hose from idle air con-
trol solenoid valve.
B2M2376A
4) Remove idle air control solenoid valve from
throttle body.
B2M2364
5) Installation is in the reverse order of removal.
CAUTION:
Replace gasket with a new one.
Tightening torque:
6.0
±0.8 N´m (0.61±0.08 kg-m, 4.4±0.6 ft-lb)
B2M2364
2. 2200 cc EXCEPT CALIFORNIA SPEC.
VEHICLES
1) Disconnect battery ground cable.
B2M1723
75
[W12A2]2-7SERVICE PROCEDURE
12. Idle Air Control Solenoid Valve

2) Disconnect connector from idle air control sole-
noid valve.
B2M2377
3) Remove idle air control solenoid valve from
throttle body.
B2M2378
4) Installation is in the reverse order of removal.
CAUTION:
Replace gasket with a new one.
Tightening torque:
6.0
±0.8 N´m (0.61±0.08 kg-m, 4.4±0.6 ft-lb)
B2M2378
3. 2500 cc MODEL
1) Disconnect battery ground cable.
B2M1723
2) Loosen clamp which connects air intake duct to
mass air flow sensor.
S2M0080
3) Loosen clamp which connects air intake cham-
ber to throttle body.
S2M0096
4) Disconnect blow-by hose and air hose, and
remove air intake chamber and air intake duct as
a unit.
S6M0007
76
2-7[W12A3]SERVICE PROCEDURE
12. Idle Air Control Solenoid Valve

5) Disconnect connector from idle air control sole-
noid valve.
S2M0099
6) Disconnect PCV hose (A) and pressure regula-
tor vacuum hose (B).
H2M2440A
7) Disconnect air by-pass hose from idle air con-
trol solenoid valve.
S2M0100
8) Remove bolts which install idle air control sole-
noid valve to throttle body.
B2M0166
9) Disconnect engine coolant hoses from idle air
control solenoid valve, and take them off.
S2M0101
10) Installation is in the reverse order of removal.
CAUTION:
Replace gasket with a new one.
Tightening torque:
6.4
±0.5 N´m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
B2M0166
B: CLEANING (2500 cc MODEL
ONLY)
1) Start and warm-up the engine until radiator fan
operates.
2) Hold throttle valve to keep the engine speed at
2,000 rpm.
B2M0357
77
[W12B0]2-7SERVICE PROCEDURE
12. Idle Air Control Solenoid Valve

3) Disconnect air by-pass hose from air intake
duct.
S2M0102A
4) Slowly pour one can (16 oz) of cleaner into by-
pass air hole.
Cleaner:
Part No. 1050002 GM Top Engine Cleaner
Part No. X66-A AC Delco Carburetor
Tune-up Conditioner
S2M0103
5) Leave the engine running for five minutes.
NOTE:
Let white smoke come out from muffler until the
cleaner is used up.
6) Stop the engine.
7) Release the throttle valve.
8) Connect air by-pass hose to air intake duct.
S2M0102A
9) Check duty ratio of idle air control solenoid
valve using Subaru Select Monitor.
NOTE:
For detailed operation procedures, refer to the
Subaru Select Monitor Operation Manual.(1) Insert the cartridge to Subaru Select Moni-
tor.
ST 24082AA090 CARTRIDGE
S2M0286A
(2) Connect Subaru Select Monitor to the data
link connector.
(3) Turn ignition switch to ON, and Subaru
Select Monitor switch to ON.
(4) Select {2. Each System Check} in Main
Menu.
(5) Select {EGI/EMPI} in Selection Menu.
(6) Select {1. Current Data Display & Save} in
EGI/EMPI Diagnosis.
(7) Select {1.12 Data Display} in Data Display
Menu.
(8) Adjust throttle position sensor to the proper
position to match with the following specifica-
tion.
ISC valve duty ratio: 25 Ð 40%
S2M0098
78
2-7[W12B0]SERVICE PROCEDURE
12. Idle Air Control Solenoid Valve

13. Pressure Sources
Switching Solenoid Valve (AT
model)
A: REMOVAL AND INSTALLATION
1) Disconnect connector from pressure sources
switching solenoid valve.
2) Disconnect hoses from pressure sources
switching solenoid valve.
3) Remove pressure sources switching solenoid
valve from bracket.
4) Installation is in the reverse order of removal.
Tightening torque:
6.4
±0.5 N´m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
B2M0777
14. Fuel Injector
A: REMOVAL AND INSTALLATION
1. RH SIDE OF 2200 cc MODEL
1) Release fuel pressure.

2) Open fuel flap lid, and remove fuel filler cap.
B2M1746
3) Disconnect battery ground cable.
B2M1723
4) Remove component parts of air intake system
on California spec. vehicles.
(1) Remove air intake duct (A) and (B) as a
unit.
B2M2012
79
[W14A1]2-7SERVICE PROCEDURE
14. Fuel Injector

13. Pressure Sources
Switching Solenoid Valve (AT
model)
A: REMOVAL AND INSTALLATION
1) Disconnect connector from pressure sources
switching solenoid valve.
2) Disconnect hoses from pressure sources
switching solenoid valve.
3) Remove pressure sources switching solenoid
valve from bracket.
4) Installation is in the reverse order of removal.
Tightening torque:
6.4
±0.5 N´m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
B2M0777
14. Fuel Injector
A: REMOVAL AND INSTALLATION
1. RH SIDE OF 2200 cc MODEL
1) Release fuel pressure.

2) Open fuel flap lid, and remove fuel filler cap.
B2M1746
3) Disconnect battery ground cable.
B2M1723
4) Remove component parts of air intake system
on California spec. vehicles.
(1) Remove air intake duct (A) and (B) as a
unit.
B2M2012
79
[W14A1]2-7SERVICE PROCEDURE
14. Fuel Injector