Mitsubishi Evolution X. Manual — part 245
STARTING SYSTEM
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ENGINE ELECTRICAL
16-33
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
AK304691
Free
Lock
AG
1. Make sure that the pinion cannot be turned
counterclockwise, and can be turned clockwise freely.
2. Check the pinion for abnormal wear and damage.
.
BRUSHES
AK202846
Brush
height
AF
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 (0.27 in)
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 CHECK
AK304687
Overrunning
clutch
Stop ring
Snap ring
Stop ring
AF
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 the armature
while slowly rotating in the growler. A shorted armature will
cause a blade to vibrate and be attracted to the core.
Replace the shorted armature.
AK304693
IGNITION SYSTEM
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ENGINE ELECTRICAL
16-34
4. Check the insulation between the armature coil cores and
the commutator segments. They are normal if there is no
continuity.
AK304692
Growler
AF
5. Check for continuity between the segments. The condition is
normal if there is continuity.
IGNITION SYSTEM
GENERAL INFORMATION
M1163000101015
This system is equipped with four ignition coils with
built-in power transistors for each of the cylinders.
Interruption of the primary current flowing in the pri-
mary side of an ignition coil generates a high voltage
in the secondary side of ignition coil. The high volt-
age thus generated is applied to the spark plugs to
generate sparks. The engine control module (ECM)
turns the power transistors inside the ignition coils
alternately on and off.This causes the primary cur-
rents in the ignition coils to be alternately interrupted
and allowed to flow to fire the cylinders in the order
1-3-4-2.
The ECM determines which ignition coil should be
controlled by means of the signals from the camshaft
position sensor and the crank angle sensor. 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 running at high altitudes,
the ignition timing is slightly advanced to provide
optimum performance. Furthermore, if knocking
occurs, the ignition timing is gradually retarded until
knocking ceases.
.
IGNITION SYSTEM
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ENGINE ELECTRICAL
16-35
SYSTEM DIAGRAM
AK703692
1
2
3
4
AD
ECM
Mass airflow sensor
No. 1 Intake air temperature
Engine coolant
temperature sensor
Intake camshaft position
sensor
Crankshaft position
sensor
Throttle position sensor
Knock sensor
Ignition switch-ST
Clutch switch <M/T>
Ignition coil
Battery
Spark plug
Cylinder No.
Engine
control
relay
: Coil driver
GENERAL SPECIFICATIONS
M1163000200097
Item
Specification
Ignition Coil
Type
Molded 4 coil
Spark Plugs
NGK
ILKR8E6
SERVICE SPECIFICATIONS
M1163000300793
Item
Standard value
Limit
Spark plug gap mm (in)
0.5
− 0.6 (0.020 − 0.023)
0.75 (0.029)
IGNITION SYSTEM
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ENGINE ELECTRICAL
16-36
ON-VEHICLE SERVICE
KNOCK CONTROL SYSTEM CHECK
M1163001800315
Check the knock sensor circuit if diagnostic trouble code, No.
P0326, P0327 or P0328 is shown.
Refer to GROUP 13A, Multiport Fuel Injection (MFI)
− Multiport
Fuel Injection (MFI) Diagnosis
− Diagnostic Trouble Code Chart
.
IGNITION COIL CHECK
M1163001201059
Required Special Tool:
MB991958: Scan Tool (M.U.T-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
NOTE: It is impossible to carry out an easy check using a cir-
cuit tester because a diode and so on are integrated into the
inside circuit of this ignition coil. Accordingly, check the ignition
coil in the following procedure.
1. Make sure the diagnosis codes are not stored using scan
tool MB991958. If stored, record the code No. Carry out the
troubleshooting for the stored codes and solve the problems
even if not related to the ignition.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
2. Disconnect the injector connectors on all of the cylinders.
3. Disconnect the ignition coil connector.
4. Remove the ignition coil and install a good spark plug to the
ignition coil.
5. Connect the ignition coil connector.
6. Ground the side electrode of the spark plug and crank the
engine.
7. Check that spark is produced between the electrodes of the
spark plug.
8. If the spark plug has weak spark or no spark, carry out the
same check using a good ignition coil. If there is strong
spark on this check with a good ignition coil, it becomes
clear there is a problem with the ignition coil. Replace the
ignition coil with a new one. If there is no spark on this check
with a good ignition coil, there is probably a problem with the
ignition circuit. Check the ignition circuit.
9. Using scan tool MB991958, make sure whether the
diagnosis codes are stored due to the check, or not. Except
the codes stored in Step 1, clear the codes all together if
they are present. And then, carry out the troubleshooting
about the codes recorded.
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