Mitsubishi Montero Sport (2004+). Manual — part 97
STARTING SYSTEM
TSB Revision
ENGINE ELECTRICAL
16-29
OVERRUNNING CLUTCH CHECK
1. While holding the clutch housing, rotate the pinion. The drive
pinion should rotate smoothly in one direction, but should
not rotate in opposite direction. If the clutch does not
function properly, replace the overrunning clutch assembly.
2. Inspect the pinion for wear or burrs. If the pinion is worn or
burred, replace the overrunning clutch assembly. If the
pinion is damaged, also inspect the ring gear for wear or
burrs.
.
FRONT AND REAR BRACKET BUSHING CHECK
Inspect the bushing for wear or burrs. If the bushing is worn or
burred, replace the front bracket assembly or rear bracket
assembly.
.
ARMATURE CHECK
1. Check that the armature coil is not grounded.
2. Place the armature in a growler.
3. Hold a thin steel blade parallel and just above while rotating
the armature slowly in the growler. A shorted armature will
cause a blade to vibrate and be attracted to the core.
Replace the shorted armature.
4. Check the insulation between the armature coil cores and
the commutator segments. They are normal if there is no
continuity.
5. Check for continuity between the segments. The condition is
normal if there is continuity.
AKX00378
FREE
LOCK
AB
AKX00379
GROWLER
AB
AKX00380
AKX00381
IGNITION SYSTEM
TSB Revision
ENGINE ELECTRICAL
16-30
IGNITION SYSTEM
GENERAL DESCRIPTION
M1163000100302
This system is provided with three ignition coils (A, B
and C) and three ignition power transistors (A, B and
C) for the number 1 and number 4 cylinders, number
2 and number 5 cylinders and number 3 and number
6 cylinders, respectively.
Interruption of the primary current flowing in the pri-
mary side of ignition coil A generates a high voltage
in the secondary side of ignition coil A.
The high voltage thus generated is applied to the
spark plugs of number 1 and number 4 cylinders to
generate sparks. At the time that the sparks are gen-
erated at both spark plugs, if one cylinder is at the
compression stroke, the other cylinder is at the
exhaust stroke, so that ignition of the compressed
air/fuel mixture occurs only for the cylinder which is
at the compression stroke.
In the same way, when the primary current flowing in
ignition coil B is interrupted, the high voltage thus
generated is applied to the spark plugs of number 2
and number 5 cylinders, and when the primary cur-
rent flowing in ignition coil C is interrupted, the high
voltage thus generated is applied to the spark plugs
of number 3 and number 6 cylinders.
The powertrain control module (PCM) controls the
three ignition power transistors (A, B and C) to turn
them alternately ON and OFF. This causes the pri-
mary currents in the ignition coils (A, B and C) to be
alternately interrupted and allowed to flow to fire the
cylinders in the order 1-2-3-4-5-6.
The PCM determines which ignition coil should be
controlled by means of the signals from the camshaft
position sensor which is incorporated in the camshaft
and from the crankshaft position sensor which is
incorporated in the crankshaft.
It also detects the crankshaft position to provide igni-
tion at the most appropriate timing in response to the
engine operation conditions.
When the engine is cold or operated at high alti-
tudes, the ignition timing is slightly advanced to pro-
vide optimum performance.
AK301846
IGNITION POWER
TRANSISTOR UNIT
IGNITION COIL
SPARK PLUGS
CYLINDER NO.
B
C
A
A
1
4
2
5
3
6
B
C
AB
INTAKE AIR TEMPERATURE SENSOR
BAROMETRIC PRESSURE SENSOR
CAMSHAFT POSITION SENSOR
CRANKSHAFT POSITION SENSOR
TRANSMISSION RANGE SWITCH
IGNITION SWITCH-ST
KNOCK SENSOR
ENGINE COOLANT TEMPERATURE
SENSOR
VOLUME AIRFLOW SENSOR
PCM
IGNITION SYSTEM
TSB Revision
ENGINE ELECTRICAL
16-31
SPECIAL TOOLS
M1163000600307
ON-VEHICLE SERVICE
SPARK PLUG CABLE TEST
M1163000900096
WARNING
Wear rubber gloves while performing this test.
1. Disconnect, one at a time, each of the spark plug cables
while the engine is idling to check whether the engine's
running performance changes or not.
2. If the engine performance does not change, check the
resistance of the spark plug cable, and check the spark plug
itself.
SPARK PLUG TEST
M1163001500109
1. Remove the spark plug and connect to the spark plug cable.
2. Ground the spark plug outer electrode (body), and crank the
engine.
Check that there is an electrical discharge between the
electrodes at this time.
TOOL
TOOL NUMBER AND
NAME
SUPERSESSION
APPLICATION
MB991348
Test harness set
MB991348-01
Inspection of ignition
primary voltage (ignition
power transistor
connection)
MB991348
AKX00431
SPARK PLUG CABLE
AB
AKX00432
SPARK PLUG
AB
AKX00277
DEFECTIVE INSULATION
DEFECTIVE INSULATION
DEFECTIVE
INSULATION
GOOD
AB
IGNITION SYSTEM
TSB Revision
ENGINE ELECTRICAL
16-32
IGNITION COIL CHECK
M1163001200335
1. Measurement of the primary coil resistance
Measure the resistance between each ignition coil terminal.
Standard value:0.74
− 0.90 Ω
2. Measurement of the secondary coil resistance
Measure the resistance between each ignition coil
high-voltage terminal.
Measurement points
• Number 3 and Number 6 cylinder side coil... A coil
• Number 1 and Number 4 cylinder side coil... B coil
• Number 2 and Number 5 cylinder side coil... C coil
Standard value: 20.1
− 27.3 kΩ
IGNITION POWER TRANSISTOR CONTINUITY
CHECK
M1163001300138
NOTE: An analog-type ohmmeter should be used.
As described in the chart below, perform a continuity check on
the ignition power transistor.
Number 1 and Number 4 cylinder side coil
Number 2 and Number 5 cylinder side coil
AKX00272
AKX00273
A
B
C
AB
1.5 V POWER SUPPLY
BETWEEN 3
− 4
CONTINUITY BETWEEN
4
− 13
Current flowing
Yes
Current not flowing
No
1.5 V POWER SUPPLY
BETWEEN 2
− 4
CONTINUITY BETWEEN
4
− 12
Current flowing
Yes
Current not flowing
No
AKX00274
11 12 13
1 2 3 4 5 6
1.5 V
+
+
-
-
AB
AKX00275
11 12 13
1 2 3 4 5
6
1.5 V
+
+
-
-
AB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст