Mitsubishi Lancer. Manual — part 209
AK202711
Segment
Undercut
Mica
AB
STARTING SYSTEM
ENGINE ELECTRICAL
16-28
3. Measure the depth of the undercut between
segments.
Standard value: 0.5 mm
Limit: 0.2 mm
BRUSH HOLDER
AK201187
Push the brush into the brush holder to make sure
that the spring is working on the brush.
If the spring is not working, replace the brush holder.
OVERRUNNING CLUTCH
AK202710
Free
Lock
AB
1. Make sure that the pinion cannot be turned
counterclockwise and can be turned clockwise
freely.
2. Check the pinion for abnormal ware and damage.
BRUSHES
AK202846
Brush
height
AB
1. Check the commutator contacting surface of each
brush for abnormal roughness. Also check the
height of the brush. Replace the brush holder if
the height is lower than the limit.
Limit: 7.0 mm
2. When the contact surface of the brush is rectified
or the brush holder is replaced, recondition the
contact surface with sandpaper wrapped around
the commutator.
ARMATURE COIL
1. Check the armature coil for short circuit as
follows:
AK202733
Growler
AB
2. Set the armature in a growler.
CAUTION
Clean the surface of the armature thoroughly
before performing the test.
3. While holding a thin strip of iron against the
armature in parallel with its axis, turn the armature
slowly. The armature is normal if the iron strip is
not attracted to the armature or it does not vibrate.
AK202734
STARTING SYSTEM
ENGINE ELECTRICAL
16-29
4. Check the insulation between commutator
segments and armature coils. The armature coils
are properly insulated if no continuity is present.
AK202713
5. Check continuity between a segment and another.
There is no open circuit in the tested coil if there is
continuity.
MAGNETIC SWITCH
AK202891
A
M terminal
AB
1. Coil open circuit test
• Check that there is continuity between the M ter-
minal and body A.
•
AK202892
M terminal
B terminal
AB
If there is no continuity, replace the magnetic
switch.
2. Contact fusion check
• Check that there is no continuity between the B
terminal and M terminal.
•
AK202893
M terminal
B terminal
AB
If there is continuity, replace the magnetic switch.
3. Switch contact check
• Push the indicated end of the magnetic switch
with a strong force to close the internal contacts.
Without releasing the switch end, check that
there is continuity between the B terminal and M
terminal.
• If there is no continuity, replace the magnetic
switch.
IGNITION SYSTEM
ENGINE ELECTRICAL
16-30
IGNITION SYSTEM
GENERAL INFORMATION
M1163000100294
This system is equipped with two ignition coils (A and
B) with built-in power transistors for the No. 1 and
No. 4 cylinders and the No. 2 and No. 3 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 volt-
age thus generated is applied to the spark plugs of
No. 1 and No. 4 cylinders to generate sparks. At the
time that the sparks are generated 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 No. 2 and
No. 3 cylinders.
The engine-ECU <M/T> or engine-A/T-ECU <A/T>
turns the two power transistors inside the ignition
coils alternately on and off. This causes the primary
currents in the ignition coils to be alternately inter-
rupted and allowed to flow to fire the cylinders in the
order 1-3-4-2.
The engine-ECU <M/T> or engine-A/T-ECU <A/T>
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 crank angle sensor which is incorporated in
the crankshaft. It also detects the crankshaft position
in order to provide ignition at the most appropriate
timing in response to the engine operation condi-
tions. It also detects the crankshaft position in order
to provide ignition 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.
When the automatic transmission shifts gears, the
ignition timing is also retarded in order to reduce out-
put torque, thereby alleviating shifting shocks.
SYSTEM DIAGRAM
AK101074
Air flow sensor
<4G6>
MAP sensor <4G1>
Intake air temperatur
sensor
Engine coolant
temperature sensor
Camshaft position
sensor
Crank angle sensor
Barometric pressure
sonsor <4G6>
Detonatoin sensor
Ignition switch-ST
Engine-A/T-
ECU <A/T>
Engine-ECU
<M/T>
Ignition coil B
Cylinder No.
2
3
4
AG
1
Spark plug
Ignition coil A
Ignition
switch
Battery
IGNITION SYSTEM
ENGINE ELECTRICAL
16-31
IGNITION COIL SPECIFICATION
Item
Specification
Type
Molded 2-coil
SPARK PLUG SPECIFICATIONS
Items
4G1
4G66
NGK
BKR6E-11
IGR6A11
DENSO
K20PR-U11
−
CHAMPION
RC8YC4
−
SERVICE SPECIFICATIONS
M1163000300180
IGNITION COIL
Item
Standard value
Secondary coil resistance k
Ω
8.5
− 11.5
SPARK PLUG
Items
Standard value Limit
Spark plug gap mm
4G1
1.0
− 1.1
−
4G6
1.0
− 1.1
1.3
RESISTIVE CORD
Item
Standard value
Limit
Resistance k
Ω
−
Maximum 19
SPECIAL TOOL
M1163000600288
Tool
Number
Name
Use
MD998773
Detonation sensor
wrench
Detonation sensor
removal and installation
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