2005 MITSUBISHI 380 engine coolant

ENGINE AND EMISSION CONTROL17-2
EMISSION CONTROL . . . . . . . .17-76
GENERAL DESCRIPTION . . . . . .
17-76
DIAGNOSIS . . . . . . . . . . . . . . . . . .17-76
SPECIAL TOOLS. . . . . . . . . . . . . .17-76
VACUUM HOSES . . . . . . . . . . . . .17-77
VACUUM HOSE ROUTING. . . . . . . . . . 17-77
VACUUM CIRCUIT DIAGRAM . . . . . . . 17-78
VACUUM HOSE INSTALLATION . . . . . 17-78
VACUUM HOSE CHECK. . . . . . . . . . . . 17-79
POSITIVE CRANKCASE VENTILATION
SYSTEM . . . . . . . . . . . . . . . . . . . . .
17-79
GENERAL DESCRIPTION (POSITIVE
CRANKCASE VENTILATION SYSTEM)17-79
COMPONENT LOCATION . . . . . . . . . . 17-80
POSITIVE CRANKCASE VENTILATION
SYSTEM CHECK. . . . . . . . . . . . . . . . . . 17-80
POSITIVE CRANKCASE VENTILATION
VALVE CHECK . . . . . . . . . . . . . . . . . . . 17-80
EVAPORATIVE EMISSION CONTROL SYSTEM . . . . . . . . . . . . . . . . . . . . .
17-81
GENERAL DESCRIPTION (EVAPORATIVE
EMISSION SYSTEM) . . . . . . . . . . . . . . . 17-81
COMPONENT LOCATION . . . . . . . . . . . 17-82
PURGE CONTROL SYSTEM CHECK
(PURGE FLOW CHECK) . . . . . . . . . . . . 17-82
EVAPORATIVE EMISSION PURGE
SOLENOID CHECK . . . . . . . . . . . . . . . . 17-83
MASS AIRFLOW SENSOR CHECK . . . 17-84
ENGINE COOLANT TEMPERATURE
SENSOR CHECK . . . . . . . . . . . . . . . . . . 17-84
INTAKE AIR TEMPERATURE SENSOR
CHECK. . . . . . . . . . . . . . . . . . . . . .17-84
EVAPORATIVE EMISSION CANISTER
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
17-81
REMOVAL AND INSTALLATION . . . . . . 17-81
INSPECTION . . . . . . . . . . . . . . . . . . . . . 17-81
CATALYTIC CONVERTER . . . . . .17-84
GENERAL DESCRIPTION (CATALYTIC
CONVERTER) . . . . . . . . . . . . . . . . . . . . 17-84
SPECIFICATIONS . . . . . . . . . . 17-85
FASTENER TIGHTENING
SPECIFICATIONS . . . . . . . . . . . . . . . . . 17-85

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-81
EVAPORATIVE EMISSION CONTROL SYSTEM
GENERAL DESCRIPTION (EVAPORATIVE EMISSION SYSTEM)M1173005100706
The evaporative emission (EVAP) system prevents
fuel vapors generated in the fuel tank from escaping
into the atmosphere.
Fuel vapors from the fuel tank flow through the vapor
pipe/hose to be stored temporarily in the EVAP can-
ister.
When the vehicle is in operation, fuel vapors stored
in the EVAP canister flow through the EVAP purge
solenoid, purge port and intake manifold plenum to
the combustion chamber.When the engine coolant temperature is low or when
the intake air quantity is small (when the engine is at
idle, for example), the Engine-ECU brings the EVAP
purge solenoid into the OFF state to shut off the fuel
vapor flow to the intake manifold plenum. This
ensures driveability when the engine is cold or run-
ning under low load and also stabilizes the emission
level.
SYSTEM DIAGRAM

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-83
Required Special Tool:
MB995061: Purge Flow Indicator
1. Disconnect the purge hose from the evaporative emission
(EVAP) purge solenoid, and connect special tool MB995061
between the EVAP purge solenoid and the purge hose.
2. Before inspection, set the vehicle in the following conditions:
Engine coolant temperature: 80 95C (176 203F)
Lights, electric cooling fan and accessories: OFF
Transaxle: P range
3. Run the engine at idle for more than four minutes.
4. Check the purge flow volume when engine is revved
suddenly several times.
Standard value: Momentarily 20 cm
3/s (2.5 SCFH) or
more.
5. If the purge flow volume is less than the standard value,
check it again with the vacuum hose disconnected from the
EVAP canister. If the purge flow volume is less than the
standard value, check the vacuum port and the vacuum
hose for clogging. Also check the EVAP purge solenoid. If
the purge flow volume is at the standard value, replace the
EVAP canister.
EVAPORATIVE EMISSION PURGE SOLENOID
CHECK
M1173001700289
1. Disconnect the vacuum hose (black, black with red paint
mark) from the evaporative emission (EVAP) purge
solenoid.
NOTE: When disconnecting the vacuum hose, always place
an identification mark so that it can be reconnected at its
original position.
2. Disconnect the harness connector.
3. Connect a hand vacuum pump to nipple (A) of the EVAP
purge solenoid (refer to the illustration at left).
4. As described in the chart below, check airtightness by
applying a vacuum with voltage applied directly from the
battery to the EVAP purge solenoid valve and without
applying voltage.
BATTERY POSITIVE
VOLTAGENORMAL CONDITION
Applied Vacuum leaks
Not applied Vacuum maintained

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-84
5. Measure the resistance between the terminals of the EVAP
purge solenoid.
Standard value: 16
[at 20C )]
6. Replace the solenoid if resistance is out of specification.
MASS AIRFLOW SENSOR CHECKM1173050400053
To inspect these parts, refer to GROUP 13A, Multipoint Fuel
Injection (MPI)
Multipoint Fuel Injection (MPI) Diagnosis
Diagnostic Trouble Code Chart 13A-17.
ENGINE COOLANT TEMPERATURE SENSOR
CHECK
M1173008100523
To inspect the sensor, refer to GROUP 13A, Multipoint Fuel
Injection (MPI)
Multipoint Fuel Injection (MPI) Diagnosis
Diagnostic Trouble Code Chart 13A-17.
INTAKE AIR TEMPERATURE SENSOR CHECKM1173008200263
To inspect the sensor, refer to GROUP 13A, Multipoint Fuel
Injection (MPI)
Multipoint Fuel Injection (MPI) Diagnosis
Diagnostic Trouble Code Chart 13A-17.
CATALYTIC CONVERTER
GENERAL DESCRIPTION (CATALYTIC CONVERTER)M1173005300131
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), also reduces nitrogen oxides
(NOx). When the mixture is controlled at stoichiometric
air-fuel ratio, the three way catalytic converter pro-
vides the highest purification against the three con-
stituents, namely, CO, HC and NOx.

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-25
TORQUE CONVERTER STALL TESTM1231005400362
This test measures the maximum engine speed when the
selector lever is in the "D" or "R" position and the torque con-
verter stalls. This tests the operation of the torque converter,
starter motor and one-way clutch operation, as well as the hold-
ing performance of the clutches and brakes in the transmission.
Do not let anyone stand in front of or behind the vehi-
cle while this test is performed.
1. Check the transmission fluid level and temperature. Check
the engine coolant temperature.
Transmission fluid level: At the "HOT" mark on the dipstick
Transmission fluid temperature: 70 80C
Engine coolant temperature: 80 100C
NOTE: Measures transmission fluid temperature with
diagnostic tool MB991958 (MUT-III sub assembly).
2. Check both rear wheels.
3. Pull the parking brake lever on, with the brake pedal fully
depressed.
4. Start the engine. 9 Transmission
range: N (on a
flat and straight
road)Monitor data list
No.22 and No.23
with the diagnostic
tool MB991958
(MUT-III sub
assembly)
(1) Move selector
lever to R range,
drive at constant
speed of 10 km/hThe ratio between
data list No.22 and
No.23 should be the
same as the gear
ratio when reversing.Does not
shiftInput shaft
speed sensor
system
(P.23A-55).
Output shaft
speed sensor
system
(P.23A-72).
Reverse gear
incorrect ratio
(P.23A-196).
STEP CONDITION
BEFORE
TEST/OPERATIONTEST/OPERATION STANDARD INSPECTION
ITEMINSPECTION
PROCEDURE
PA G E

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-26
The throttle should not be fully open for any more than
five seconds.
If you repeat the stall test when the transmission fluid
temperature is greater than 80
C, move the selector
lever to the "N" position and let the engine run at
approximately 1,000 r/min for at least one minute. Wait
until the transmission fluid temperature returns to 80
C
or less.
5. Move the selector lever to the "D" position. Fully depress the
accelerator pedal and read the maximum engine speed at
this time.
Standard value: Stall speed: 2,100
2,600 r/min
6. Move the selector lever to the "R" position. Fully depress the
accelerator pedal and read the maximum engine speed.
Standard value: Stall speed: 2,100
2,600 r/min
TORQUE CONVERTER STALL TEST JUDGMENT
RESULTS
1. Stall speed is too high in both "D" and "R" range
Malfunction of the torque converter (Slippage on the splines
of the torque converter and the input shaft)
Low line pressure
Low-reverse brake slippage and malfunction of the one-way
clutch
2. Stall speed is too high in "D" range only
Underdrive clutch slippage
3. Stall speed is too high in "R" range only
Reverse clutch slippage
4. Stall speed is too low in both "D" and "R" ranges
Malfunction of the torque converter (Slippage of the
one-way clutch)
Insufficient engine output
HYDRAULIC PRESSURE TESTSM1231005500392
The transmission fluid temperature should be between 70
80C during the test.
1. Check the transmission fluid level and temperature. Check
engine coolant temperature.
Transmission fluid level: "HOT" mark on the dipstick
Transmission fluid temperature: 70 80C
Engine coolant temperature: 80 100C
2. Raise the vehicle so that the wheels are free to turn.