engine SUBARU LEGACY 1996 Service Repair Manual

B2M0154
3. Throttle Body
A: REMOVAL AND INSTALLATION
1) Remove air intake duct.
G2M0280
2) Disconnect accelerator cable
1.
3) Disconnect cruise control cable

2. (With cruise control
model)
B2M0155
4) Disconnect connector from throttle position sensor.
B2M0156
5) Disconnect engine coolant hoses from throttle body.
B2M0157
6) Remove bolts which install throttle body to intake mani-
fold.
7) Installation is in the reverse order of removal.
CAUTION:
Always use a new gasket.
Tightening torque:
22±2 N⋅m (2.2±0.2 kg-m, 15.9±1.4 ft-lb)
7
2-7SERVICE PROCEDURE
3. Throttle Body

B2M0334
(3) Remove bolts which install power steering pump
from bracket.
B2M0029
(4) Place power steering pump on the right side wheel
apron.
B6M0160
8) Disconnect spark plug cords from ignition coil.
H2M1246
9) Disconnect engine coolant hoses from throttle body.
H2M1259A
10) Disconnect engine coolant hose
1from idle air con-
trol solenoid valve.
11) Disconnect air by-pass hose

2from idle air control
solenoid valve.
9
2-7SERVICE PROCEDURE
4. Intake Manifold

B2M0342
12) Disconnect brake booster hose.
B2M0343
13) Remove EGR pipe.
G2M0370
14) Disconnect canister hose from pipe.
B2M0019
15) Disconnect engine harness connectors from bulkhead
harness connectors.
B2M0345A
16) Disconnect connectors from engine coolant tempera-
ture sensor

1and thermometer
2.
10
2-7SERVICE PROCEDURE
4. Intake Manifold

B2M0159
22) Remove bolts which hold intake manifold onto cylinder
heads.
B2M0160
23) Remove intake manifold.
B2M0757A
B: DISASSEMBLY
1) Disconnect engine ground terminal from intake mani-
fold.
B2M0347A
2) Disconnect connectors from throttle position sensor,
ignition coil, fuel injectors, idle air control solenoid valve,
purge control solenoid valve and EGR solenoid valve.
3) Remove engine harness from intake manifold.


1EGR solenoid valve


2Throttle position sensor


3Idle air control solenoid valve


4Purge control solenoid valve


5Harness band
H2M1247
4) Remove idle air control solenoid valve from intake
manifold.
12
2-7SERVICE PROCEDURE
4. Intake Manifold

B2M0347A
5) Install engine harness onto intake manifold.
6) Connect connectors to throttle position sensor, ignition
coil, fuel injectors, idle air control solenoid valve, purge
control solenoid valve and EGR solenoid valve.


1EGR solenoid valve


2Throttle position sensor


3Idle air control solenoid valve


4Purge control solenoid valve


5Harness band
B2M0757A
7) Connect engine ground terminal to intake manifold.
B2M0159
D: INSTALLATION
1) Install intake manifold onto cylinder heads.
CAUTION:
Always use new gaskets.
Tightening torque:
25±2 N⋅m (2.5±0.2 kg-m, 18.1±1.4 ft-lb)
G2M0296
2) Connect fuel hoses.
G2M0091
3) Connect connector to oil pressure switch.
14
2-7SERVICE PROCEDURE
4. Intake Manifold

G2M0408
4) Connect connector to crankshaft position sensor.
G2M0416
5) Connect connector to camshaft position sensor.
B2M0346
6) Connect connector to knock sensor.
B2M0345A
7) Connect connectors to engine coolant temperature sen-
sor

1and thermometer
2.
B2M0019
8) Connect engine harness connector to bulkhead har-
ness connectors.
15
2-7SERVICE PROCEDURE
4. Intake Manifold

G2M0370
9) Connect canister hoses.
B2M0342
10) Connect brake booster vacuum hose.
H2M1259A
11) Connect engine coolant hose
1to idle air control sole-
noid valve.
12) Connect air by-pass hose

2to idle air control solenoid
valve.
H2M1246
13) Connect engine coolant hoses to throttle body.
B6M0160
14) Connect spark plug cords to ignition coil.
16
2-7SERVICE PROCEDURE
4. Intake Manifold

B2M0154
18) Install air cleaner element, air cleaner upper cover and
air intake duct.
19) Connect connector to mass air flow sensor.
B2M0154
5. Engine Coolant Temperature Sensor
A: REMOVAL AND INSTALLATION
1) Remove air intake duct.
G2M0407
2) Disconnect connector from engine coolant temperature
sensor.
3) Remove engine coolant temperature sensor.
G2M0407
4) Installation is in the reverse order of removal.
Tightening torque:
25±3 N⋅m (2.5±0.3 kg-m, 18.1±2.2 ft-lb)
G2M0408
6. Crankshaft Position Sensor
A: REMOVAL AND INSTALLATION
1) Remove bolt which install crankshaft position sensor to
cylinder block.
18
2-7SERVICE PROCEDURE
4. Intake Manifold - 6. Crankshaft Position Sensor

B2M0164
12. Idle Air Control Solenoid Valve
A: REMOVAL AND INSTALLATION
1) Disconnect connector from idle air control solenoid
valve.
B2M0165A
2) Disconnect engine coolant hoses
1from idle air con-
trol solenoid valve.
3) Disconnect air by-pass hose

2from idle air control
solenoid valve.
B2M0166
4) Remove idle air control solenoid valve from throttle
body.
5) 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)
B2M0357
B: CLEANING
1) Start and warm-up the engine until radiator fan oper-
ates.
2) Hold throttle valve so that engine speed is at 2,000 rpm.
B2M0359
3) Disconnect by-pass hose from idle air control solenoid
valve.
26
2-7SERVICE PROCEDURE
12. Idle Air Control Solenoid Valve

B2M0358
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
5) Leave the engine running for five minutes.
NOTE:
White smoke comes out of the muffler until the cleaner is
used up.
6) Stop the engine.
B2M0359
7) Release the throttle valve.
8) Connect by-pass hose to idle air control solenoid valve.
G2M0096
9) Check duty ratio of idle air control solenoid valve with
Subaru Select Monitor.
(1) Connect Subaru Select Monitor to the data link con-
nector.
(2) Start the engine and turn Subaru Select Monitor
switch to ON.
(3) Select mode“F12”.
(4) Make sure duty ratio on radiator fan and electric
load is OFF.
Specified data: 25—40%
B2M0361
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.
27
2-7SERVICE PROCEDURE
12. Idle Air Control Solenoid Valve - 13. Pressure Sources Switching Solenoid Valve (AT model)