Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 394

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-95

EVAPORATIVE EMISSION VENTILATION
SOLENOID CHECK

M1173007800057

Refer to Evaporative Emission Canister And Fuel Tank
Pressure Relief Valve

−

Fuel Tank Pressure Relief Valve

Inspection

P.17-103

.

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

17-96

EXHAUST GAS RECIRCULATION (EGR) SYSTEM

GENERAL DESCRIPTION

M1173005200048

The exhaust gas recirculation (EGR) system lowers
the oxides of nitrogen (NOx) emission level. When
the air/fuel mixture combustion temperature is high,
a large quantity of NOx is generated in the
combustion chamber. Therefore, this system
recirculates part of exhaust gas from the exhaust
port of the cylinder head to the combustion chamber
through the intake manifold to decrease the air/fuel
mixture combustion temperature, resulting in
reduction of NOx.
The EGR flow rate is controlled by the EGR valve so
as not to decrease the driveability.

OPERATION

When the engine coolant temperature is low, when
the engine is at idle or when a wide open throttle
operation is performed, the EGR valve is kept
closed, achieving no EGR.
After warming up of the engine, the EGR valve can
be opened by the engine control module.
The engine control module monitors the EGR system
and illuminates the check engine/malfunction
indicator lamp to indicate that there is a malfunction.

SYSTEM DIAGRAM

<2.4L ENGINE>

AKX01310

VACUUM CONTROL VALVE

ON

OFF

EGR
SOLENOID

MFI RELAY

BATTERY

ECM<M/T>
PCM<A/T>

VOLUME AIR FLOW
SENSOR

ENGINE COOLANT
TEMPERATURE SENSOR

CRANKSHAFT POSITION
SENSOR

EGR
VALVE

AB

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

17-97

<3.0L ENGINE>

COMPONENT LOCATION

M1173007600020

AKX00353

VACUUM CONTROL VALVE

ON

OFF

EGR
SOLENOID

MFI RELAY

BATTERY

ECM<M/T>
PCM<A/T>

VOLUME AIR FLOW
SENSOR

ENGINE COOLANT
TEMPERATURE SENSOR

CRANKSHAFT POSITION
SENSOR

EGR
VALVE

AC

AKX01312 AB

EGR SOLENOID
<2.4L ENGINE>

AKX01313AB

EGR VALVE
<2.4L ENGINE>

EMISSION CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-98

EGR SYSTEM CHECK

M1173002600058

1. Disconnect the vacuum hose (black) from the EGR valve,

and then connect a hand vacuum pump via the Tee-fitting.

2. Start the engine. Check the vacuum condition when the

throttle valve is opened suddenly (revving) during cold and
hot engine conditions. If the engine is hot and the vacuum
does not rise over 13 kPa (3.9 in Hg), perform the vacuum
control valve check and EGR port vacuum check. Then
continue to Step 3. If vacuum rises momentarily, proceed to
Step 3.

When engine is cold
[Engine coolant temperature: 20

°

C (68

°

F) or less]

When engine is hot
[Engine coolant temperature: 80

°

C (176

°

F) or more]

AKX01314

EGR SOLENOID
<3.0L ENGINE>

INTAKE
MANIFOLD

AB

AKX01315

THROTTLE
BODY

EGR VALVE
<3.0L ENGINE>

AB

THROTTLE VALVE NORMAL VACUUM CONDITION

Open quickly

No vacuum (Remained as
barometric pressure).

THROTTLE VALVE NORMAL VACUUM CONDITION

Open quickly

Momentarily rises over 13 kPa (3.9
in Hg)

AKX01316 AB

EGR VALVE

TEE-
FITTING

BLACK

<2.4L ENGINE>

AKX01317AB

EGR VALVE

TEE-
FITTING

BLACK

<3.0L ENGINE>