MITSUBISHI 380 2005 Workshop Manual

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-80
COMPONENT LOCATIONM1173007400189
POSITIVE CRANKCASE VENTILATION SYSTEM
CHECK
M1173001100232
1. Remove the positive crankcase ventilation (PCV) valve from
the rocker cover.
2. With the engine idling, put your finger on the open end of the
PCV valve, and check for negative pressure (vacuum).
NOTE: At this time, the plunger in the PCV valve should
move back and forth as the open end is covered and uncov-
ered.
3. If negative pressure is not felt, clean or replace the PCV
valve. Inspect the vacuum supply hose and vacuum supply
hose port for restriction or plugged condition.
POSITIVE CRANKCASE VENTILATION VALVE
CHECK
M1173001200228
1. Hold the positive crankcase ventilation (PCV) valve with the
vacuum side down. Insert a thin rod, and using lamp
pressure, depress the end of the PCV valve spring by 5
10
mm. Release pressure on the rod to see if the PCV valve
spring will lift the rod to its original position.
2. If the rod returns quickly to its original position, the PCV
valve is OK. If the stick does not return quickly, clean or
replace the PCV valve.

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 CONTROL17-82
COMPONENT LOCATIONM1173007500205
PURGE CONTROL SYSTEM CHECK (PURGE FLOW CHECK)M1173001400620

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.

SPECIFICATIONS
ENGINE AND EMISSION CONTROL17-85
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONSM1173006400324
SERVICE SPECIFICATIONSM1173000300545
ITEM SPECIFICATION
Auto-cruise control system
Lower cover cap bolt 9.0
2.0 Nm (80 17 in-lb)
Steering wheel assembly nut 41
8 Nm (30 6 ft-lb)
Engine control system
Accelerator pedal assembly nut 13
2 Nm ( 111 22 in-lb)
ITEMSSTANDARD VALUE
Engine control system
Curb idle speed r/min 3.8L Engine 680
100
Emission control system
Purge flow cm
3/s (SCFH) [at 80 95C (176 205F) with sudden revving]20 (2.5)
Evaporative emission purge solenoid coil resistance [at 20
C)] 16

SPECIFICATIONS
ENGINE AND EMISSION CONTROL17-86

26-1
GROUP 26
FRONT AXLE
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .26-2
FRONT AXLE DIAGNOSIS . . . . . . . .26-2
TROUBLESHOOTING STRATEGY . . . . . . 26-2
SYMPTOM CHART. . . . . . . . . . . . . . . . . . . 26-3
SYMPTOM PROCEDURES . . . . . . . . . . . . 26-3
SPECIAL TOOLS . . . . . . . . . . . . . . . .26-4
ON-VEHICLE SERVICE . . . . . . . . . . .26-8
WHEEL BEARING END PLAY CHECK . . . 26-8
HUB BOLT REPLACEMENT . . . . . . . . . . . 26-8
FRONT AXLE HUB ASSEMBLY . . . .26-9
REMOVAL AND INSTALLATION . . . . . . . . 26-9
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 26-12
DRIVE SHAFT ASSEMBLY . . . . . . . .26-13
REMOVAL AND INSTALLATION . . . . . . . . 26-13
DISASSEMBLY AND ASSEMBLY . . . . . . . 26-18
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 26-25
BJ BOOT REPLACEMENT . . . . . . . . . . . . . 26-26
SPECIFICATIONS . . . . . . . . . . . . . . .26-29
FASTENER TIGHTENING SPECIFICATIONS26-29
GENERAL SPECIFICATIONS . . . . . . . . . . 26-29
SERVICE SPECIFICATIONS . . . . . . . . . . . 26-29
LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . 26-30

GENERAL DESCRIPTION
FRONT AXLE26-2
GENERAL DESCRIPTIONM1261000100370
The front axle consists of front hubs, knuckles, wheel
bearings and drive shafts, and has the following fea-
tures:
The wheel bearing incorporates double-row
angular contact ball bearing for reduced friction.
The front wheel hub assembly combines the hub,
wheel bearing, and oil seal in a single unit for
fewer parts, better durability, improved assembly
precision, and better structural organization.
The driveshaft incorporates BJ-PTJ type constant
velocity joints with high transmission efficiency for
low vibration and noise.
Due to the use of the inner shaft and bracket
assembly, the right and left drive shafts are
approximately the same in length. This reduces
noise, vibration and torque steer.L-RH>
The dynamic damper is mounted on the LH drive-
shaft.
ABS rotor for detecting the wheel speed is
press-fitted to the BJ.
NOTE: .
TJ: Tripod Joint
PTJ: Pillow Tripod Joint
BJ: Birfield Joint
CONSTRUCTION DIAGRAM
FRONT AXLE DIAGNOSIS
TROUBLESHOOTING STRATEGYM1261005600240
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a front axle fault.
1. Gather information from the customer.

FRONT AXLE DIAGNOSIS
FRONT AXLE26-3
2. Verify that the condition described by the
customer exists.3. Find the malfunction by following the Symptom
Chart.
4. Verify malfunction is eliminated.
SYMPTOM CHARTM1261005700269
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: Noise during Wheel Rotation
DIAGNOSIS
STEP 1. Check the wheel bearing end play.
(1) Remove the caliper assembly and suspend it with a wire.
(2) Remove the brake disc from the front hub.
(3) Attach a dial gauge as shown in the illustration, and then
measure the end play while moving the hub in the axial
direction.
Limit: 0.05 mm (0.002 inch)
Q: Is the wheel bearing end play within the limit?
YES : Go to step 2.
NO : Replace the part, then go to Step 5.
STEP 2. Check the drive shaft and inner shaft for bending.
Q: Is the drive shaft and inner shaft bent?
YES : Replace the part. Then go to Step 5.
NO : Go to step 3.
STEP 3. Check the center bearing for wear.
Q: Is the center bearing worn?
YES : Replace the bearing. Then go to Step 5.
NO : Go to step 4.
STEP4. Check the drive shaft assembly for wear or
damage.
Q: Is the drive shaft assembly worn or damaged?
YES : Replace the drive shaft assembly. Then go to Step 5.
NO : There is no action to be taken. SYMPTOM INSPECTION
PROCEDUREREFERENCE PAGE
Drive shaft Noise during wheel rotation 1
P.26-3
Noise due to excessive play of wheel in turning
direction2
P.26-4