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

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

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

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

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

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

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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

P.13A-44

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

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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