1999 SUBARU LEGACY sensor

1. Front Catalytic Converter
A: REMOVAL
1) Disconnect battery ground cable.
B2M1723
2) Disconnect front oxygen sensor connector.
B2M1979A
S2M0127A
3) Disconnect rear oxygen sensor connector.
(2500 cc California spec. vehicles)
S2M0128
4) Lift-up the vehicle.
5) Disconnect rear oxygen sensor connector.
(Except 2500 cc California spec. vehicles)
B2M0312
6) Separate center exhaust pipe from front cata-
lytic converter.
S2M0052
7) Remove bolts which hold front exhaust pipe
onto cylinder heads.
CAUTION:
Be careful not to pull down front exhaust pipe
and center exhaust pipe.
S2M0236
2
2-1[W1A0]SERVICE PROCEDURE
1. Front Catalytic Converter

8) Separate front catalytic converter from front
exhaust pipe.
S2M0053
B: INSTALLATION
CAUTION:
Replace gaskets with new ones.
1) Install front catalytic converter to front exhaust
pipe and center exhaust pipe.
Tightening torque:
30
±5 N´m (3.1±0.5 kg-m, 22.4±3.6 ft-lb)
S2M0053
2) Tighten bolts which hold front exhaust pipe onto
cylinder heads.
Tightening torque:
30
±5 N´m (3.1±0.5 kg-m, 22.4±3.6 ft-lb)
S2M0236
3) Install center exhaust pipe to front catalytic con-
verter.
Tightening torque:
35
±5 N´m (3.6±0.5 kg-m, 26.0±3.6 ft-lb)
S2M0052
4) Connect rear oxygen sensor connector. (Except
2500 cc California spec. vehicles)
B2M0312
5) Lower the vehicle.
6) Connect rear oxygen sensor connector. (2500
cc California spec. vehicles)
S2M0128
3
[W1B0]2-1SERVICE PROCEDURE
1. Front Catalytic Converter

7) Connect front oxygen sensor connector.
B2M1979A
S2M0127A
8) Connect battery ground cable.
B2M1723
2. Rear Catalytic Converter
A: REMOVAL
1) Disconnect battery ground cable.
B2M1723
2) Lift-up the vehicle.
3) Disconnect rear oxygen sensor connector.
(Except 2500 cc California spec. vehicles)
B2M0312
4) Separate center exhaust pipe and rear catalytic
converter assembly from rear exhaust pipe.
B2M0055
4
2-1[W2A0]SERVICE PROCEDURE
2. Rear Catalytic Converter

7) Connect front oxygen sensor connector.
B2M1979A
S2M0127A
8) Connect battery ground cable.
B2M1723
2. Rear Catalytic Converter
A: REMOVAL
1) Disconnect battery ground cable.
B2M1723
2) Lift-up the vehicle.
3) Disconnect rear oxygen sensor connector.
(Except 2500 cc California spec. vehicles)
B2M0312
4) Separate center exhaust pipe and rear catalytic
converter assembly from rear exhaust pipe.
B2M0055
4
2-1[W2A0]SERVICE PROCEDURE
2. Rear Catalytic Converter

5) Connect rear oxygen sensor connector. (Except
2500 cc California spec. vehicles)
B2M0312
6) Lower the vehicle.
7) Connect battery ground cable.
B2M1723
3. Canister
A: REMOVAL AND INSTALLATION
1) Lift-up the vehicle.
2) Loosen two clamps which hold two canister
hoses.
B2M2381A
3) Disconnect evaporation three hoses from can-
ister.
B2M2383
4) Remove canister from body.
S2M0142
6
2-1[W3A0]SERVICE PROCEDURE
3. Canister

5) Connect rear oxygen sensor connector. (Except
2500 cc California spec. vehicles)
B2M0312
6) Lower the vehicle.
7) Connect battery ground cable.
B2M1723
3. Canister
A: REMOVAL AND INSTALLATION
1) Lift-up the vehicle.
2) Loosen two clamps which hold two canister
hoses.
B2M2381A
3) Disconnect evaporation three hoses from can-
ister.
B2M2383
4) Remove canister from body.
S2M0142
6
2-1[W3A0]SERVICE PROCEDURE
3. Canister

8. Fuel Temperature Sensor
A: REMOVAL
1) Release fuel pressure.
2) Remove fuel filler cap.
B2M1746
3) Disconnect battery ground cable.
B2M1723
4) Disconnect fuel delivery hose (A), return hose
(B) and jet pump hose (C).
B2M0954E
5) Remove nuts which install fuel pump assembly
onto fuel tank.
B2M0955
6) Take off fuel pump assembly from fuel tank.
B2M0956
7) Disconnect connector from fuel pump bracket.
S2M0145
8) Remove main fuel level sensor from fuel pump
assembly.
NOTE:
Fuel temperature sensor is a unit with fuel pump.
If replacing it, replace as a fuel pump.
S2M0855
11
[W8A0]2-1SERVICE PROCEDURE
8. Fuel Temperature Sensor

B: INSTALLATION
CAUTION:
Leave fuel filler cap open when tightening nuts,
to prevent fuel from flowing out through fuel
delivery and return pipes. Close fuel filler cap
after tightening nuts.
Installation is in the reverse order of removal. Do
the following:
(1) Always use new gaskets.
(2) Ensure sealing portion is free from fuel or for-
eign particles before installation.
(3) Tighten nuts in alphabetical sequence shown
in figure to specified torque.
Tightening torque:
4.4
±1.5 N´m (0.45±0.15 kg-m, 3.3±1.1 ft-lb)
B2M0955C
9. Fuel Tank Pressure Sensor
A: REMOVAL AND INSTALLATION
1) Release fuel pressure.
2) Open fuel flap lid, and remove fuel filler cap.
B2M1746
3) Disconnect battery ground cable.
B2M1723
4) Drain fuel from fuel tank.
G2M0345
5) Remove fuel tank.
S2M0169A
12
2-1[W8B0]SERVICE PROCEDURE
9. Fuel Tank Pressure Sensor