Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 149
EC(w/o STI)-29
Secondary Air Pump
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)
15.Secondary Air Pump
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the clip (A) which holds the harness on
the harness stay and remove the bolt (B) which
holds the secondary air pump on the vehicle.
3) Disconnect the connector (A) and air duct (B)
from secondary air pump and remove the second-
ary air pump.
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
19 N·m (1.9 kgf-m, 14.0 ft-lb)
C: INSPECTION
1. SECONDARY AIR PUMP
1) Check that the secondary air pump has no defor-
mation, cracks or other damages.
2) Connect battery positive terminal to the terminal
No. 2 and battery negative terminal to the terminal
No. 1, and inspect the secondary air pump opera-
tion.
CAUTION:
Do not operate the secondary air pump contin-
uously for 80 seconds or more.
2. OTHER INSPECTIONS
Check that the air duct has no cracks, damage or
loose part.
IN-00203
EC-02691
(B)
(A)
EC-02743
(A)
(B)
EC-02427
2 1
EC(w/o STI)-30
Secondary Air Combination Valve
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)
16.Secondary Air Combination
Valve
A: REMOVAL
1. SECONDARY AIR COMBINATION
VALVE LH
1) Disconnect the ground cable from battery.
2) Remove the intercooler. <Ref. to IN(w/o STI)-12,
3) Disconnect the connector from the secondary air
combination valve LH.
4) Disconnect the air duct A.
5) Remove the secondary air pipe LH.
6) Remove the secondary air combination valve
LH.
2. SECONDARY AIR COMBINATION
VALVE RH
1) Disconnect the ground cable from battery.
2) Remove the intercooler. <Ref. to IN(w/o STI)-12,
3) Remove the intake manifold. <Ref. to FU(w/o
STI)-18, REMOVAL, Intake Manifold.>
4) Disconnect the air duct A.
5) Disconnect the secondary air pipe RH.
6) Remove the secondary air combination valve
RH.
(A) Secondary air combination valve LH
(B) Clip
(C) Air duct A
(D) Gasket
(E) Air duct B
(F) Secondary air pipe LH
(G) Gasket
IN-00203
EC-02737
(A)
(D)
(F)
(B)
(B)
(E)
(G)
(C)
A
A
B
B
(A) Secondary air combination valve RH
(B) Clip
(C) Air duct A
(D) Gasket
(E) Secondary air pipe RH
(F) Gasket
IN-00203
EC-02685
(B)
(C)
(E)
(F)
(D)
(A)
EC(w/o STI)-31
Secondary Air Combination Valve
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)
B: INSTALLATION
1. SECONDARY AIR COMBINATION
VALVE LH
Install in the reverse order of removal.
NOTE:
Use a new gasket.
Tightening torque:
T1: 6.4 N·m (0.7 kgf-m, 4.7 ft-lb)
T2: 9 N·m (0.9 kgf-m, 6.6 ft-lb)
T3: 19 N·m (1.9 kgf-m, 14.0 ft-lb)
2. SECONDARY AIR COMBINATION
VALVE RH
Install in the reverse order of removal.
NOTE:
Use a new gasket.
Tightening torque:
9 N·m (0.9 kgf-m, 6.6 ft-lb)
(A) Secondary air combination valve LH
(B) Clip
(C) Air duct A
(D) Gasket
(E) Air duct B
(F) Secondary air pipe LH
(G) Gasket
EC-02738
(A)
(D)
(F)
(B)
(B)
(E)
(G)
(C)
T1
T3
T2
A
A
B
B
(A) Secondary air combination valve RH
(B) Clip
(C) Air duct A
(D) Gasket
(E) Secondary air pipe RH
(F) Gasket
EC-02686
(B)
(C)
(E)
(F)
(D)
(A)
EC(w/o STI)-32
Secondary Air Combination Valve
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)
C: INSPECTION
1. SECONDARY AIR COMBINATION
VALVE LH
1) Check that the secondary air combination valve
LH has no deformation, cracks or other damages.
2) Check the resistance between the terminals of
secondary air combination valve LH.
3) Check that air does not come out from (B) when
air is blown into (A).
4) Connect the battery positive terminal to the ter-
minal No. 2 and the battery negative terminal to the
terminal No. 1. Check that air is discharged from
(B), when supplying air to (A).
2. SECONDARY AIR COMBINATION
VALVE RH
1) Check that the secondary air combination valve
RH has no deformation, cracks or other damages.
2) Check the resistance between the terminals of
secondary air combination valve RH.
Terminal No.
Standard
1 and 2
5.0±0.5 Ω
(when 20°C (68°F))
2 1
EC-02428
EC-02434
(A)
(B)
Terminal No.
Standard
4 and 6
5.0±0.5 Ω
(when 20°C (68°F))
2 and 3
15 kΩ or less
1 and 2
4.5 kΩ or less
EC-02435
2 1
(A)
(B)
EC-02429
3
1
6 5 4
2
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