Subaru 2001 IMPREZA Manuel utilisateur

FUJI HEAVY INDUSTRIES LTD. G1830GE2

2001 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX

ENGINE 1 SECTION

This service manual has been prepared

to provide SUBARU service personnel

with the necessary information and data

for the correct maintenance and repair

of SUBARU vehicles.

This manual includes the procedures

for maintenance, disassembling, reas-

sembling, inspection and adjustment of

components and diagnostics for guid-

ance of experienced mechanics.

Please peruse and utilize this manual

fully to ensure complete repair work for

satisfying our customers by keeping

their vehicle in optimum condition.

When replacement of parts during

repair work is needed, be sure to use

SUBARU genuine parts.

All information, illustration and specifi-

cations contained in this manual are

based on the latest product information

available at the time of publication

approval.

FUEL INJECTION (FUEL SYSTEMS) FU(SOHC)

EMISSION CONTROL

(AUX. EMISSION CONTROL DEVICES) EC(SOHC)

INTAKE (INDUCTION) IN(SOHC)

MECHANICAL ME(SOHC)

EXHAUST EX(SOHC)

COOLING CO

LUBRICATION LU

SPEED CONTROL SYSTEMS SP

IGNITION IG(SOHC)

STARTING/CHARGING SYSTEMS SC

ENGINE (DIAGNOSTICS) EN(SOHC)

EMISSION CONTROL

(AUX. EMISSION CONTROL DEVICES)

EC(SOHC)

Page

1. General Description ....................................................................................2

2. Front Catalytic Converter............................................................................3

3. Rear Catalytic Converter.............................................................................6

4. Canister.......................................................................................................7

5. Purge Control Solenoid Valve.....................................................................8

6. Two-way Valve............................................................................................9

EC(SOHC)-2

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

GENERAL DESCRIPTION

1. General Description

A: CAUTION

•Wear working clothing, including a cap, protec-

tive goggles, and protective shoes during opera-

tion.

•Remove contamination including dirt and corro-

sion before removal, installation or disassembly.

•Keep the disassembled parts in order and pro-

tect them from dust or dirt.

•Before removal, installation or disassembly, be

sure to clarify the failure. Avoid unnecessary re-

moval, installation, disassembly, and replacement.

•Be careful not to burn your hands, because each

part on the vehicle is hot after running.

•Be sure to tighten fasteners including bolts and

nuts to the specified torque.

•Place shop jacks or safety stands at the specified

points.

•Before disconnecting electrical connectors of

sensors or units, be sure to disconnect negative

terminal from battery.

EC(SOHC)-3

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

FRONT CATALYTIC CONVERTER

2. Front Catalytic Converter

A: REMOVAL

1) Set the vehicle on the lift.

2) Disconnect battery ground cable.

3) Disconnect front oxygen (A/F) sensor connector.

4) Disconnect connector from rear oxygen sensor

connector.

5) Lift-up the vehicle.

6) Remove under cover.

7) Separate center exhaust pipe from rear exhaust

pipe.

CAUTION:

Be careful, exhaust pipe is hot.

8) Remove bolts which hold front exhaust pipe onto

cylinder heads.

9) Remove front exhaust pipe and center exhaust

pipe from hanger bracket.

CAUTION:

Be careful not to pull down front exhaust pipe

and center exhaust pipe.

G6M0095

B2M4243

B2M4244

B2M3109

B2M3200

B2M3111

EC(SOHC)-4

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

FRONT CATALYTIC CONVERTER

10) Separate front catalytic converter from front ex-

haust pipe.

NOTE:

The rear catalytic converter is integrated with front

catalytic converter. Therefore, the procedure for re-

moving rear catalytic converter is the same as the

description above.

B: INSTALLATION

CAUTION:

Replace gaskets with new ones.

1) Install front catalytic converter to front exhaust

pipe.

Tightening torque:

30 N·m (3.1 kgf-m, 22.4 ft-lb)

2) Install front exhaust pipe and center exhaust

pipe. And temporarily tighten bolt which installs

center exhaust pipe to hanger bracket.

3) Tighten bolts which hold front exhaust pipe onto

cylinder heads.

Tightening torque:

30 N·m (3.1 kgf-m, 22.4 ft-lb)

4) Install center exhaust pipe to rear exhaust pipe.

Tightening torque:

18 N·m (1.8 kgf-m, 13.0 ft-lb)

5) Tighten bolt which holds center exhaust pipe to

hanger bracket.

Tightening torque:

35 N·m (3.6 kgf-m, 26.0 ft-lb)

6) Install under cover.

S2M0923

B2M3111

B2M3200

B2M3109

B2M3111

EC(SOHC)-5

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

FRONT CATALYTIC CONVERTER

7) Lower the vehicle.

8) Connect front oxygen (A/F) sensor connector.

9) Connect connector to rear oxygen sensor con-

nector.

10) Connect battery ground cable.

NOTE:

The rear catalytic converter is integrated with front

catalytic converter. Therefore, the procedure for in-

stalling rear catalytic converter is the same as the

description above.

C: INSPECTION

1) Make sure there are no exhaust leaks from con-

nections and welds.

2) Make sure there are no holes or rusting.

B2M4243

B2M4244

G6M0095

EC(SOHC)-6

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

REAR CATALYTIC CONVERTER

3. Rear Catalytic Converter

A: REMOVAL

The front and rear catalytic converter and center

exhaust pipe are integrated into one unit. There-

fore, the removal and installation procedures are

the same as the those for the front catalytic con-

verter. <Ref. to EC(SOHC)-3, REMOVAL, Front

Catalytic Converter.>

B: INSTALLATION

The front and rear catalytic converter and center

exhaust pipe are integrated into one unit. There-

fore, the removal and installation procedures are

the same as the ones described under front catalyt-

ic converter. <Ref. to EC(SOHC)-4, INSTALLA-

TION, Front Catalytic Converter.>

C: INSPECTION

1) Make sure there are no exhaust leaks from con-

nections and welds.

2) Make sure there are no holes or rusting.

(A) Front catalytic converter

(B) Rear catalytic converter

(A) Front catalytic converter

(B) Rear catalytic converter

B2M4164A

EC(SOHC)-7

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

CANISTER

4. Canister

A: REMOVAL

1) Lift-up the vehicle.

2) Loosen two clamps which hold two canister hos-

es, and disconnect evaporation hose from canister.

3) Remove canister from body.

B: INSTALLATION

1) Install in the reverse order of removal.

Tightening torque:

23 N·m (2.3 kgf-m, 17 ft-lb)

C: INSPECTION

Make sure the canister and canister hoses are not

cracked or loose.

EN0898

B2M4166

EC(SOHC)-8

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

PURGE CONTROL SOLENOID VALVE

5. Purge Control Solenoid Valve

A: REMOVAL

1) Disconnect battery ground cable.

2) Remove bolt which installs purge control sole-

noid valve onto intake manifold.

3) Take out purge control solenoid valve through

the bottom of the intake manifold.

4) Disconnect connector and hoses from purge

control solenoid valve.

B: INSTALLATION

1) Install in the reverse order of removal.

Tightening torque:

16 N·m (1.6 kgf-m, 11.6 ft-lb)

CAUTION:

Carefully connect the evaporation hoses.

C: INSPECTION

Make sure hoses are not cracked or loose.

G6M0095

H2M2985

H2M2986

H2M2985

B2M1893A

EC(SOHC)-9

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

TWO-WAY VALVE

6. Two-way Valve

A: REMOVAL

1) Lift-up the vehicle.

2) Remove canister from body. <Ref. to EC(SO-

HC)-7, REMOVAL, Canister.>

3) Remove two-way valve with bracket as a single

unit from body.

4) Remove two-way valve from bracket.

B: INSTALLTION

1) Install in the reverse order of removal.

C: INSPECTION

1) Make sure that hoses are not cracked or loose.

EN0901

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