Mitsubishi Lancer Evolution X. Manual — part 100

STARTING SYSTEM

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ENGINE ELECTRICAL

16-31

DISASSEMBLY SERVICE POINTS

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<<A>> MAGNETIC SWITCH REMOVAL

CAUTION

Do not clamp the yoke assembly with a vise.
Disconnect the lead from the M terminal of the magnetic switch.

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<<B>> SNAP RING / STOP RING REMOVAL

1. Apply a long socket wrench of an appropriate size to the

stop ring and strike the wrench to drive out the stop ring
toward the pinion gear side.

2. Remove the snap ring with snap ring pliers, then remove the

stop ring and overrunning clutch.

STARTER MOTOR PARTS CLEANING

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1. Never clean in a solvent such starter motor parts as the

magnetic switch, brush holder, and armature. If they are
soaked in a solvent, their insulation could be impaired.
When these parts require cleaning, wipe off contamination
with cloth.

2. Never soak the drive unit in a solvent. If it is washed in a

solvent, the grease having been packed in the overrunning
clutch at the factory will be washed out. Wipe the drive unit
with cloth if it requires cleaning.

AK301505AG

Magnetic
stitch

B terminal

S terminal

M terminal

Field coil
lead

AK304685

Socket wrench

Stop ring

Pinion gear

Overrunning
clutch

AF

AK304686

Snap ring pliers

Snap ring

Pinion gear

Overrunning
clutch

AF

STARTING SYSTEM

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ENGINE ELECTRICAL

16-32

REASSEMBLY SERVICE POINTS

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>>A<< STOP RING / SNAP RING INSTALLATION

Use a suitable puller to pull the stop ring until it gets over the
snap ring.

INSPECTION

M1162001300470

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COMMUTATOR CHECK

1. Place the armature on a pair of V-blocks, and check the

deflection by using a dial gauge.

Standard value: 0.05 mm (0.002 inch)
Limit: 0.10 mm (0.004 inch)

2. Check the outer diameter of the commutator.

Standard value: 29.4 mm (1.16 inch)
Minimum limit: 28.8 mm (1.13 inch)

3. Check the depth of the undercut between segments.

Standard value: 0.5 mm (0.02 inch)
Minimum limit: 0.2 mm (0.01 inch)

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AK304687

Overrunning
clutch

Stop ring

Snap ring

Stop ring

AF

AK304688

AK304689

AK304690

Segment

Undercut

Mica

AF

STARTING SYSTEM

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ENGINE ELECTRICAL

16-33

BRUSH HOLDER

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.

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OVERRUNNING CLUTCH

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.

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BRUSHES

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.

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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 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.

AK201187

AK304691

Free

Lock

AG

AK202846

Brush
height

AF

AK304687

Overrunning
clutch

Stop ring

Snap ring

Stop ring

AF

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.

5. Check for continuity between the segments. The condition is

normal if there is continuity.

IGNITION SYSTEM

GENERAL INFORMATION

M1163000101242

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.

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AK304693

AK304692

Growler

AF