1996 SUBARU LEGACY engine coolant

C: HI MODE OPERATION (WITH A/C MODEL)
CONDITION:
Condition (1) :
Engine coolant temperature is below 89°C (192°F).
A/C switch is turned ON.
Vehicle speed is over 20 km/h (12 MPH).
Condition (2) :
Engine coolant temperature is above 95°C (203°F).
A/C switch is turned OFF.
Vehicle speed is over 20 km/h (12 MPH).
Condition (3) :
Engine coolant temperature is above 95°C (203°F).
A/C switch is turned ON.
TROUBLE SYMPTOM:
Radiator main fan does not rotate at HI speed under
conditions (1), (2) and (3) above.
1. Check operation of main fan motor LO mode.
OK
Not OK
Check LO mode operation.
2. Check power supply to main fan relay-2.
OK
Not OK
Melted fuse (in A/C relay holder),repair the
shorted part of the circuit,replace fuse.
3. Check main fan relay-2.
OK
Not OK
Replace main fan relay-2.
4. Check harness connector between main fan
relay-2 and main fan motor.
OK
Not OK
Repair or replace wiring harness.
5. Check ground circuit of main fan motor.
OK
Not OK
Repair or replace wiring harness.
6. Check main fan motor.
OK
Not OK
Replace main fan motor.
Refer to 2-7 On-Board Diagnostics II System.






27
2-5DIAGNOSTICS
2. Radiator Main Fan

A: LO MODE OPERATION
CONDITION:
Condition (1) :
Engine coolant temperature is below 89°C (192°F).
A/C switch is turned ON.
Vehicle speed is below 10 km/h (6 MPH).
Condition (2) :
Engine coolant temperature is above 95°C (203°F).
A/C switch is turned OFF.
Vehicle speed is below 10 km/h (6 MPH).
TROUBLE SYMPTOM:
Radiator sub fan does not rotate at LO speed under
conditions (1) and (2) above.
1. Check fuse and power supply.
OK
Not OK
Melted fuse,repair the shorted part of the circuit
,replace fuse.
2. Check harness connector between fuse and
relay box, and sub fan motor.
OK
Not OK
Repair or replace wiring harness.
3. Check ground circuit of sub fan motor.
OK
Not OK
Repair or replace wiring harness.
4. Check sub fan motor.
OK
Not OK
Replace sub fan motor.
Refer to 2-7 On-Board Diagnostics II System.




31
2-5DIAGNOSTICS
3. Radiator Sub Fan (With A/C model only)

B: HI MODE OPERATION
CONDITION:
Condition (1) :
Engine coolant temperature is below 89°C (192°F).
A/C switch is turned ON.
Vehicle speed is over 20 km/h (12 MPH).
Condition (2) :
Engine coolant temperature is above 95°C (203°F).
A/C switch is turned OFF.
Vehicle speed is over 20 km/h (12 MPH).
Condition (3) :
Engine coolant temperature is above 95°C (203°F).
A/C switch is turned ON.
TROUBLE SYMPTOM:
Radiator sub fan does not rotate at HI speed under con-
ditions (1), (2) and (3) above.
1. Check operation of sub fan motor LO mode.
OK
Not OK
Check LO mode operation.
2. Check power supply to sub fan relay-2.
OK
Not OK
Melted fuse (in A/C relay holder),repair the
shorted part of the circuit,replace fuse.
3. Check sub fan relay-2.
OK
Not OK
Replace sub fan relay-2.
4. Check harness connector between sub fan
relay-2 and sub fan motor.
OK
Not OK
Repair or replace wiring harness.
5. Check ground circuit of sub fan motor.
OK
Not OK
Repair or replace wiring harness.
6. Check sub fan motor.
OK
Not OK
Replace sub fan motor.
Refer to 2-7 On-Board Diagnostics II System.






33
2-5DIAGNOSTICS
3. Radiator Sub Fan (With A/C model only)

1. Intake Manifold
B2M0739A

1Intake manifold gasket LH
(2200 cc model)


2Intake manifold gasket RH
(2200 cc model)


3Intake manifold gasket LH
(2500 cc model)


4Intake manifold gasket RH
(2500 cc model)


5Fuel injector pipe insulator


6Fuel injector pipe


7O-ring A


8O-ring B


9Fuel injector


10Insulator


11Fuel injector cap


12Plate


13Sealing

14Gasket


15Engine coolant hose B


16Air by-pass hose


17Idle air control solenoid valve


18Engine coolant hose A


19Nipple (AT model)


20Plug


21PCV valve


22Purge control solenoid valve


23Nipple


24BPT


25BPT holder bracket


26Back pressure hose


27EGR vacuum hose A


28EGR vacuum pipe


29EGR vacuum hose C


30EGR valve

31Gasket


32EGR vacuum hose B


33EGR solenoid valve


34EGR pipe


35Collar


36Intake manifold
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 3.4±0.5 (0.35±0.05, 2.5±0.4)
T2: 6.4±0.5 (0.65±0.05, 4.7±0.4)
T3: 16±1.5 (1.6±0.15, 11.6±1.1)
T4: 19±1 (1.9±0.1, 13.7±0.7)
T5: 19±1.5 (1.9±0.15, 13.7±1.1)
T6: 23±3 (2.3±0.3, 16.6±2.2)
T7: 25±2 (2.5±0.2, 18.1±1.4)
T8: 34±2 (3.5±0.2, 25.3±1.4)
2
2-7COMPONENT PARTS
1. Intake Manifold

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

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