Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 52

EC(STI)-22

Leak Check Valve Assembly

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

2) Check the voltage at a normal atmospheric pres-

sure.
NOTE:

The atmospheric pressure at higher altitude is low-

er than normal. Therefore, the voltage is lower than

the standard value.

3) Connect the battery positive terminal to terminal

No. 3 and the battery ground terminal to terminal

No. 4, and check that there is a voltage drop from

the voltage measured in step 2) when the vacuum

pump is operated.

4. OTHER INSPECTIONS

Check that the drain tube has no cracks, damage

or loose part.

Terminal No.

Standard

7 (+) and 8 (–)

Approx. 3.5 V (when 25°C (77°F))

EC-02995

4.8 5.2V

1.5V

1.5V

1.5V

4 3

1

8 7 6 5

2

V

EC(STI)-23

Drain Separator

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

12.Drain Separator

A: REMOVAL

1) Lift up the vehicle.

2) Remove the rear differential. <Ref. to DI-22, RE-

MOVAL, Rear Differential (T-type).>

3) Disconnect the drain hose from the connector.

4) Remove the drain separator from the vehicle.

B: INSTALLATION

Install in the reverse order of removal.
Tightening torque:

7.5 N·m (0.8 kgf-m, 5.5 ft-lb)

C: DISASSEMBLY

1) Remove the drain hose from the drain separator.

2) Lift up the claw (A) of the drain separator and

slide the drain separator in the direction of the ar-

row to remove the drain separator.

D: ASSEMBLY

Assemble in the reverse order of disassembly.

E: INSPECTION

1) Check that the drain separator and drain separa-

tor bracket have no deformation, crack, or other

damage.

2) Check that the drain hose has no crack, dam-

age, or looseness.

3) Check that no foreign substances are clogged in

the drain separator.

EC-02715

EC-03163

EC-03164

EC-03165

(A)

EC(STI)-24

PCV Hose Assembly

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

13.PCV Hose Assembly

A: REMOVAL

CAUTION:

Do not remove unless the hose and the diag-

nostics connector are broken.

1) Disconnect the connector (A) from the PCV hose

assembly A.

2) Remove the PCV hose assembly A from the clip

(B), and remove the PCV hose assembly A from

the PCV pipe.

3) Remove the connector from the PCV hose as-

sembly B.

4) Remove the PCV hose assembly B from the in-

take duct.

5) Remove the intake manifold. <Ref. to FU(STI)-

17, REMOVAL, Intake Manifold.>

6) Remove the turbocharger. <Ref. to IN(STI)-15,

REMOVAL, Turbocharger.>

7) Remove the PCV hose assembly C from the cyl-

inder block RH.
NOTE:

Pinch the clamp of the PCV hose assembly C by fit-

ting the cut out in the ST with the protrusion on the

clamp as shown in the figure, and unlock the

clamp.

ST 18353AA000 CLAMP PLIERS

EC-03007

(B)

(A)

EC-03008

EC-03009

ME-04374

ST

EC-03011

EC(STI)-25

PCV Hose Assembly

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)

B: INSTALLATION

1) Install the PCV hose assembly C onto the cylin-

der block RH.
NOTE:

Use a new clamp for the PCV hose assembly C, fit

the cut out in the ST with the protrusion on the

clamp as shown in the figure, and lock the clamp.

ST 18353AA000 CLAMP PLIERS

2) Install the turbocharger. <Ref. to IN(STI)-16, IN-

STALLATION, Turbocharger.>

3) Install the intake manifold. <Ref. to FU(STI)-21,

INSTALLATION, Intake Manifold.>

4) Install the PCV hose assembly B onto the intake

duct.

5) Connect the connector to the PCV hose assem-

bly B.

6) Install the PCV hose assembly A to the PCV

pipe, and install the PCV hose assembly A to the

clip (B).

7) Connect the connector (A) to the PCV hose as-

sembly A.

C: INSPECTION

1. DIAGNOSIS CONNECTOR

1) Check that the diagnosis connector has no de-

formation, cracks and any other damage.

2) Check the resistance between the diagnosis

connector terminals.

2. OTHER INSPECTIONS

1) Check that the PCV connector has no deforma-

tion, cracks or other damages.

2) Check that the hose has no cracks, damage or

loose part.

ME-04374

ST

EC-03011

EC-03009

Terminal No.

Standard

1 and 2

Less than 1 Ω

EC-03008

EC-03007

(B)

(A)

2 1

EC-02428