Mitsubishi Montero Sport (2004+). Manual — part 80
ON-VEHICLE SERVICE
TSB Revision
ENGINE MECHANICAL
11A-9
IGNITION TIMING CHECK
M1111001700566
Required Special Tool:
MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
1. Before checks, set the vehicle in the following condition:
• Engine coolant temperature: 80 − 95°C (176 − 203°F)
• Lights and all accessories: OFF
• Transmission: P range
NOTE: Vehicles for Canada, the headlight, taillight, etc.
remain lit even when the lighting switch is in "OFF" position
but this is no problem for checks.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.
3. Set up a timing light.
4. Start the engine and run it at idle.
5. Check that the idle speed is approximately 700 r/min.
6. Select scan tool MB991958 actuator test "item number 17".
7. Check that basic ignition timing is within the standard value.
Standard value: 5
° BTDC ± 3°
8. If the basic ignition timing is not within the standard value,
check the following items:
• Diagnostic output
• Timing belt cover and crankshaft position sensor installation
conditions
• Crankshaft sensing blade condition
CAUTION
If the actuator test is not canceled, the forced drive will
continue for 27 minutes. Driving in this state could lead to
engine failure.
9. Press the clear key on scan tool MB991958 (select forced
drive stop mode), and cancel the actuator test.
10.Check that the actual ignition timing is at the standard value.
Standard value: Approximately 10
° BTDC
NOTE: Ignition timing fluctuates about
±
7
°
Before Top Dead
Center, even under normal operating condition.
NOTE: It is automatically further advanced by about 5
°
to
15
°
Before Top Dead Center at higher altitudes.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
ON-VEHICLE SERVICE
TSB Revision
ENGINE MECHANICAL
11A-10
CURB IDLE SPEED CHECK
M1111003500610
Required Special Tool:
MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
1. Before checks, set the vehicle in the following condition.
• Engine coolant temperature: 80 − 95°C (176 − 203°F)
• Lights and all accessories: OFF
• Transmission: P range
NOTE: Vehicles for Canada, the headlight, taillight, etc.
remain lit even when the lighting switch is in "OFF" position
but this is no problem for checks.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.
3. Check the basic ignition timing.
Standard value: 5
° BTDC ± 3°
4. Start the engine.
5. Run the engine at idle for 2 minutes.
6. Check the idle speed. Select item number 22 and take a
reading of the idle speed.
Curb idle speed: 700
± 100 r/min
NOTE: The idle speed is controlled automatically by the idle
air control system.
7. If the idle speed is outside the standard value, refer to
GROUP 13A, Multiport Fuel Injection (MFI)
− Multiport Fuel
Injection (MFI) Diagnosis
− Symptom Chart
AK303629AB
MB991911
MB991827
MB991824
16-PIN
ON-VEHICLE SERVICE
TSB Revision
ENGINE MECHANICAL
11A-11
IDLE MIXTURE CHECK
M1111002100385
Required Special Tool:
MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
1. Before checks, set the vehicle in the following condition:
• Engine coolant temperature: 80 − 95°C (176 − 203°F)
• Lights and all accessories: OFF
• Transmission: P range
NOTE: Vehicles for Canada, the headlight, taillight, etc.
remain lit even when the lighting switch is in "OFF" position
but this is no problem for checks.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.
3. Check that the basic ignition timing is within the standard
value.
Standard value: 5
° BTDC ± 3°
4. Start the engine and increase the engine speed to 2,500
r/min for 2 minutes.
5. Set the CO, HC tester.
6. Check the CO contents and the HC contents at idle.
Standard value:
CO contents: 0.5 % or less
HC contents: 100 ppm or less
7. If the CO and HC contents do not remain inside the standard
value, check the following items:
NOTE: Replace the catalytic converter when the CO and HC
contents do not remain inside the standard value, even
though the result of the inspection is normal for all items.
• Diagnostic output
• Closed-loop control (When the closed-loop control is carried
out normally, the output signal of the heated oxygen sensor
changes between 0
− 400 mV and 600 − 1,000 mV at idle.)
• Fuel pressures
• Injector
• Ignition coil, spark plug cable, spark plug
• Exhaust gas recirculation system and EGR valve leak
• Evaporative emission control system
• Compression pressure
AK303629AB
MB991911
MB991827
MB991824
16-PIN
ON-VEHICLE SERVICE
TSB Revision
ENGINE MECHANICAL
11A-12
COMPRESSION PRESSURE CHECK
M1111002600625
1. Before checks, check that the engine oil, starter and battery
are normal. Also, set the vehicle in the following condition:
• Engine coolant temperature: 80 − 95°C (176 − 203°F)
• Lights and all accessories: OFF
• Transmission: P range
NOTE: Vehicles for Canada, the headlight, taillight, etc.
remain lit even when the lighting switch is in "OFF" position
but this is no problem for checks.
2. Disconnect the spark plug cables.
3. Remove all of the spark plugs.
4. Disconnect the crankshaft position sensor connector.
NOTE: Doing this will prevent the powertrain control module
from carrying out ignition and fuel injection.
WARNING
Keep your distance from the spark plug hole when
cranking. Oil, fuel, etc., may spray out from the spark
plug hole and may cause serious injury.
5. Cover the spark plug hole with a shop towel etc., during
cranking. After the engine has been cranked, check for
foreign material adhering to the shop towel.
6. Set compression gauge to one of the spark plug holes.
7. Crank the engine with the throttle valve fully open and
measure the compression pressure.
Standard value (at engine speed of 250
− 400 r/min):
1,200 kPa (171 psi)
Minimum limit (at engine speed of 250
− 400 r/min):
890 kPa (127 psi)
8. Measure the compression pressure for all the cylinders, and
check that the pressure differences of the cylinders are
below the limit.
Limit: 98 kPa (14 psi)
9. If there is a cylinder with compression or a compression
difference that is outside the limit, pour a small amount of
engine oil through the spark plug hole, and repeat the
operations in steps 6 to 8.
(1) If the compression increases after oil is added, the cause
of the malfunction is a worn or damaged piston ring
and/or cylinder inner surface.
(2) If the compression does not rise after oil is added, the
cause is a burnt or defective valve seat, or pressure is
leaking from the gasket.
10.Connect the crankshaft position sensor connector.
11.Install the spark plugs and spark plug cables.
12.Use the scan tool to erase the diagnostic trouble codes.
NOTE: This will erase the diagnostic trouble code resulting
from the crankshaft position sensor connector being discon-
nected.
AK303390 AB
CRANKSHAFT POSITION
SENSOR CONNECTOR
AKX00436
COMPRESSION
GAUGE
AB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст