Mitsubishi Outlander XL. Manual — part 435
GROUP 15
INTAKE AND EXHAUST
CONTENTS
GENERAL INFOMATION. . . ..
SERVICE SPECIFICATION. . ...
ON-VEHICLE SERVICE. . . ..
INTAKE MANIFOLD TUNING SYSTEM CHECK
. . . . . . . ....
INTAKE MANIFOLD TUNING SOLENOID
CHECK. . . . . . ...
VACUUM TANK CHECK <6G7>. . .
INTAKE AND EXHAUST DIAGNOSIS
. . . . . . . ....
INTRODUCTION. . . . ....
TROUBLESHOOTING STRATEGY. ....
SYMPTOM CHART. . . . ...
SYMPTOM PROCEDURES. . . ..
Inspection Procedure 1: Exhaust
Leakage. . . . . . ..
.15-4
Inspection Procedure 2: Abnormal Noise
. . . . . . . . ..
SPECIAL TOOLS. . . . ...
AIR CLEANER. . . . . .
REMOVAL AND INSTALLATION. ....
INTAKE MANIFOLD PLENUM. . .
REMOVAL AND INSTALLATION. ....
INTAKE MANIFOLD. . . . .
REMOVAL AND INSTALLATION. .
INSPECTION. . . . . .
EXHAUST MANIFOLD. . . ...
REMOVAL AND INSTALLATION. ...
INSPECTION. . . . . .
EXHAUST PIPE AND MAIN MUFFLER
. . . . . . . ...
REMOVAL AND INSTALLATION. ...
15-1
GENERAL INFOMATION
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The exhaust pipe is divided into four parts.
SERVICE SPECIFICATION
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Item
Standard value
Limit
Intake manifold tuning solenoid coil resistance [at 20°
C (68°F)] Ω
29 - 35
-
Intake manifold distortion of the installation surface
mm (in)
0.15 (0.006) or less
0.20 (0.008)
Exhaust manifold distortion of the installation surface
mm (in)
0.7 (0.028) or less
0.5 (0.020)
ON-VEHICLE SERVICE
INTAKE MANIFOLD TUNING SYSTEM CHECK
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1.
Warm up the engine.
ZK600341
Intake manifold
tuning solenoid
Intake manifold
tuning actuator
AA00
2.
Disconnect the vacuum hose from the intake manifold tuning
(IMT) actuator, and then connect a vacuum gauge via the Tee-
fitting.
3.
Start the engine and verify that a vacuum is applied to the
vacuum gauge.
4.
As described in the chart below, vary the engine speed to
inspect the vacuum conditions. During this inspection, verify
that the rod of the IMT actuator is operating.
ENGINE SPEED
NORMAL
CONDITION
CONTROL
VALV
3,750 r/min or less
Vacuum
maintained
Closed
Within 3,750 r/min or
less, engine is suddenly
raced
Vacuum
not
change
Closed
4,050 r/min or more
Vacuum leaks
Open
INTAKE MANIFOLD TUNING SOLENOID CHECK
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1.
Disconnect the vacuum hoses from the intake manifold tuning
(IMT) solenoid.
NOTE:
When disconnecting the vacuum hose, always make
sure that it can be reconnected at its original position.
2.
Disconnect the harness connector.
15-2
INTAKE AND EXHAUST
GENERAL INFOMATION
ZK600342
B
A
AA00
3.
Connect a hand vacuum pump to nipple (B) of the IMT
solenoid.
4.
As described in the chart below, check airtightness by
applying a vacuum with voltage applied directly from the
battery to the IMT solenoid, and without applying voltage.
BATTERY
POSITIVE
VOLTAGE
NIPPLE
(A)
CONDITION
NORMAL
CONDITION
Applied
Open
Vacuum leaks
Closed
Vacuum
maintained
Not applied
Open
Vacuum leaks
ZK600343AA00
5.
Measure the resistance between the terminals of the IMT
solenoid.
Standard value: 29 - 35 Ω [at 20°C (68°F)]
6.
Replace solenoid resistance is out of specification.
VACUUM TANK CHECK <6G7>
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ZK600344
A
B
AA00
1.
Disconnect the vacuum hoses from the vacuum tank.
NOTE:
When disconnecting the vacuum hose, always make
sure that it can be reconnected at its original position.
2.
Connect a hand vacuum pump to nipple "A" of the vacuum
tank, apply a vacuum of 67 kPa (19.7 in.Hg), and verify that
the vacuum is maintained.
3.
Disconnect the hand vacuum pump from nipple "A" and
connect it to nipple "B".
4.
Block nipple "A" with your finger and apply a vacuum of 67 kPa
(19.7 in.Hg) to nipple "B". Release your finger from nipple "A"
and verify that the vacuum leaks immediately.
5.
Replace the vacuum tank if it is faulty.
INTAKE AND EXHAUST DIAGNOSIS
INTRODUCTION
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Intake leaks usually create driveability issues that are
not obviously related to the intake system. Exhaust
leaks or abnormal noise is caused by cracks, gaskets
and fittings, or by exhaust pipe or muffler damage due
to impacts during travel. The exhaust leaks from these
sections and causes the exhaust noise to increase.
There may be cases when the system contacts the
body and vibration noise is generated.
INTAKE AND EXHAUST
15-3
ON-VEHICLE SERVICE
TROUBLESHOOTING STRATEGY
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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 an
intake or exhaust system fault.
1.
Gather information from the customer.
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 CHART
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Symptom
Inspection procedure
Reference page
Exhaust leakage
1
Abnormal noise
2
SYMPTOM PROCEDURES
Inspection Procedure 1: Exhaust Leakage
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DIAGNOSIS
STEP 1. Start the engine. Have an assistant stay
in the driver’s seat. Raise the vehicle on a hoist.
Have the assistant rev the engine while searching
for exhaust leaks.
Q:Is the exhaust leaking?
YES:
Go to Step 2.
NO:
The procedure is complete.
STEP 2. Check the gasket for cracks, damage.
Q:Is the gasket damaged?
YES:
Replace the gasket, then go to Step 1.
NO:
Go to Step 3.
STEP 3. Check for loosening in each coupling
section.
Q:Is there any loosening in any section?
YES:
Tighten, then go to Step 1.
NO:
There is no action to be taken.
Inspection Procedure 2: Abnormal Noise
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DIAGNOSIS
STEP 1. Start the engine. Have an assistant stay
in the drivers seat. Raise the vehicle on a hoist.
Have the assistant rev the engine while searching
for exhaust leaks.
Q:Is any abnormal noise generated?
YES:
Go to Step 2.
NO:
The procedure is complete.
STEP 2. Check for missing parts in the muffler.
Tap the muffler lightly to check for loose baffles,
etc.
Q:Are there any missing parts in the muffler?
YES:
Replace, then go to Step 1.
NO:
Go to Step 3.
15-4
INTAKE AND EXHAUST
INTAKE AND EXHAUST DIAGNOSIS
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