Page 1 of 1456
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
Page 2 of 1456
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
Page 3 of 1456
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
Page 4 of 1456
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
Page 5 of 1456
5) Separate center exhaust pipe and rear catalytic
converter assembly from front catalytic converter.
S2M0052
6) Remove center exhaust pipe and rear catalytic
converter assembly from hanger bracket.
CAUTION:
IBe careful not to pull down center exhaust
pipe.
IAfter removing center exhaust pipe, do not
apply excessive pulling force on front catalytic
converter and front exhaust pipe.
B2M0313
B: INSTALLATION
CAUTION:
Replace gaskets with new ones.
1) Install center exhaust pipe and rear catalytic
converter assembly.
Temporarily tighten bolt which installs center
exhaust pipe to hanger bracket.
B2M0313
2) 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
3) Install center exhaust pipe to rear exhaust pipe.
Tightening torque:
18
±5 N´m (1.8±0.5 kg-m, 13.0±3.6 ft-lb)
B2M0055
4) Tighten bolt which holds center exhaust pipe to
hanger bracket.
Tightening torque:
35
±5 N´m (3.6±0.5 kg-m, 26.0±3.6 ft-lb)
B2M0313
5
[W2B0]2-1SERVICE PROCEDURE
2. Rear Catalytic Converter
Page 6 of 1456
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
Page 7 of 1456
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
Page 35 of 1456
3. Engine Idle Speed
A: MEASUREMENT
1) Before checking idle speed, check the follow-
ing:
(1) Ensure that air cleaner element is free from
clogging, ignition timing is correct, spark plugs
are in good condition, and that hoses are con-
nected properly.
(2) Ensure that malfunction indicator light
(CHECK ENGINE light) does not illuminate.
2) Warm-up the engine.
3) Stop the engine, and turn ignition switch to
OFF.
4) When using SUBARU SELECT MONITOR;
NOTE:
For detailed operation procedures, refer to the
SUBARU SELECT MONITOR OPERATION
MANUAL.
(1) Insert the cartridge to SUBARU SELECT
MONITOR.
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) Start the engine, and read engine idle
speed.
S2M0098
5) When using tachometer (Secondary pick-up
type).
(1) Attach the pick-up clip to No. 1 cylinder
spark plug cord.
(2) Start the engine, and read engine idle
speed.
B2M2011
NOTE:
IWhen using the OBD-II general scan tool, care-
fully read its operation manual.
IThis ignition system provides simultaneous igni-
tion for #1 and #2 plugs. It must be noted that
some tachometers may register twice that of actual
engine speed.
6) Check idle speed when unloaded. (With
headlights, heater fan, rear defroster, radiator fan,
air conditioning, etc. OFF)
Idle speed (No load and gears in neutral (MT),
or N or P (AT) position):
700
±100 rpm
7) Check idle speed when loaded. (Turn air con-
ditioning switch to |P¢rdquo;ON|P'ldquo; and oper-
ate compressor for at least one minute before
measurement.)
Idle speed [A/C ªONº, no load and gears in
neutral (MT) or N or P (AT) position]:
850
±50 rpm
3
[W3A0]2-2SERVICE PROCEDURE
3. Engine Idle Speed
