Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 396

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

17-103

INSPECTION

M1173004600076

ORVR VENT VALVE MODULE CHECK

1. Blow air through over vent valve module nipple (A). Check

that the air flows out of nipple (B) and nipple (C).

2. Connect a hand vacuum pump to nipple (A) of the over vent

valve module.

3. With air flow through nipple (C) obstructed, apply a vacuum

and check that the vacuum is maintained.

AC001912AB

A

B

C

EVAPORATIVE EMISSION
VENTILATION SOLENOID

AIR FILTER

VENT VALVE

AC001913AB

A

C

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

17-104

4. Check air tightness by applying a vacuum with voltage

applied directly from the battery to the over vent valve
module and without applying voltage.

5. Measure the resistance between the terminals of the

solenoid.

Standard value: 17

−

21

Ω

[at 20

°

C (68

°

F)]

6. Replace over vent valve module if resistance is out of

specification.

BATTERY VOLTAGE

NORMAL CONDITION

Applied

Vacuum maintained

Not applied

Vacuum leaks

AC001914

A

AB

AC001915

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

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CATALYTIC CONVERTER

GENERAL DESCRIPTION (CATALYTIC CONVERTER)

M1173005300090

The three-way catalytic converter, together with the
closed loop air-fuel ratio control based on the oxygen
sensor signal, oxidizes carbon monoxides (CO) and
hydrocarbons (HC) and reduces nitrogen oxides
(NOx).

When the mixture is controlled at stoichiometric air-
fuel ratio, the three-way catalytic converter provides
the highest purification against the three
constituents, namely, CO, HC and NOx.

REMOVAL AND INSTALLATION

M1173003900085

AC004608

N

N

1

2

3

3

<2.4L ENGINE>

AC

12 ± 2 N·m
107 ± 17 in-lb

12 ± 2 N·m
107 ± 17 in-lb

49 ± 10 N·m
37 ± 7 ft-lb

49 ± 10 N·m
37 ± 7 ft-lb

44 ± 5 N·m
33 ± 3 ft-lb

REMOVAL STEPS

<<A>>

>>A<<

1.

HEATED OXYGEN SENSOR
(REAR)

2.

FRONT EXHAUST PIPE
(CATALYTIC CONVERTER
INCORPORATED)

3.

HANGER

REMOVAL STEPS (Continued)

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

17-106

AC005045

N

N

N

N

N

1

2

3

4

5

6

7

8

9

<3.0L ENGINE>

AC

44 ± 5 N·m
33 ± 3 ft-lb

44 ± 5 N·m
33 ± 3 ft-lb

49 ± 9 N·m
37 ± 6 ft-lb

49 ± 9 N·m
37 ± 6 ft-lb

32 ± 7 N·m
24 ± 5 ft-lb

35 ± 4 N·m
26 ± 3 ft-lb

35 ± 4 N·m
26 ± 3 ft-lb

32 ± 7 N·m
24 ± 5 ft-lb

49 ± 9 N·m
37 ± 6 ft-lb

44 ± 5 N·m
33 ± 3 ft-lb

12 ± 2 N·m
107 ± 17 in-lb

12 ± 2 N·m
107 ± 17 in-lb

12 ± 2 N·m
107 ± 17 in-lb

FRONT CATALYTIC
CONVERTER (LH) REMOVAL
STEPS

<<A>>

>>A<<

1.

LEFT BANK HEATED OXYGEN
SENSOR (REAR)

2.

FRONT EXHAUST PIPE
(CATALYTIC CONVERTER
INCORPORATED)

3.

HANGER

4.

FRONT CATALYTIC
CONVERTER (LH)

5.

EXHAUST FITTING STAY (LH)

FRONT CATALYTIC
CONVERTER (RH) REMOVAL
STEPS

<<A>>

>>A<<

1.

LEFT BANK HEATED OXYGEN
SENSOR (REAR)

2.

FRONT EXHAUST PIPE
(CATALYTIC CONVERTER
INCORPORATED)

3.

HANGER

<<A>>

>>A<<

6.

RIGHT BANK HEATED OXYGEN
SENSOR (REAR)

<<A>>

>>A<<

7.

RIGHT BANK HEATED OXYGEN
SENSOR (FRONT)

8.

FRONT CATALYTIC
CONVERTER (RH)

9.

EXHAUST FITTING STAY (RH)