Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 143

EC(w/o STI)-5

Front Catalytic Converter

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

2. Front Catalytic Converter

A: REMOVAL

The front catalytic converter is integrated into the

center exhaust pipe (front). Refer to “Center Ex-

haust Pipe” for removal procedures. <Ref. to

EX(STI)-8, REMOVAL, Center Exhaust Pipe.>

B: INSTALLATION

The front catalytic converter is integrated into the

center exhaust pipe (front). Refer to “Center Ex-

haust Pipe” for installation procedures. <Ref. to

EX(STI)-9, INSTALLATION, Center Exhaust

Pipe.>

C: INSPECTION

1) Check the connections and welded parts for ex-

haust leaks.

2) Make sure there are no holes or rusting.

EC(w/o STI)-6

Rear Catalytic Converter

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

3. Rear Catalytic Converter

A: REMOVAL

The rear catalytic converter is integrated into the

center exhaust pipe (rear). Refer to “Center Ex-

haust Pipe” for removal procedures. <Ref. to

EX(STI)-8, REMOVAL, Center Exhaust Pipe.>

B: INSTALLATION

The rear catalytic converter is integrated into the

center exhaust pipe (rear). Refer to “Center Ex-

haust Pipe” for installation procedures. <Ref. to

EX(STI)-9, INSTALLATION, Center Exhaust

Pipe.>

C: INSPECTION

1) Check the connections and welded parts for ex-

haust leaks.

2) Make sure there are no holes or rusting.

EC(w/o STI)-7

Canister

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

4. Canister

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Open the trunk, and remove the trunk room mat.

(4 door model)

3) Open the rear gate, and remove the luggage

floor mat. (5 door model)

4) Tilt the rear seat backrest forward.

5) Remove the sub trunk box and spacers. (4 door

model)

6) Remove the luggage floor box and spacers. (5

door model)

7) Remove the center canister cover.

8) Remove the canister cover RH.

9) Disconnect the purge tube (A), vent tube (B),

drain tube A (C) and PCV drain tube (D).
NOTE:

Disconnect the quick connector as shown in the fig-

ure.

10) Remove the canister.

IN-00203

EC-02972

EC-02973

(a) Retainer

EC-02281

(a)

(a)

(a)

EC-02974

(B)

(C)

(A)

(D)

EC-02975

EC(w/o STI)-8

Canister

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

11) Remove the canister cover LH.

12) Disconnect drain tube A (A) and drain tube B

(B).
NOTE:

Disconnect the quick connector as shown in the fig-

ure.

13) Disconnect the connector (A) from leak check

valve assembly, and remove the leak check valve

assembly.

14) Remove the clip (A), which secures the leak

check valve assembly harness, from the valve

bracket, and remove the valve bracket.

(a) Retainer

EC-02976

EC-02281

(a)

(a)

(a)

EC-02977

(A)

(B)

EC-02978

(A)

EC-02979

(A)