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