Mitsubishi Outlander (2003+). Manual — part 141

STARTING SYSTEM

ENGINE ELECTRICAL

16-29

ARMATURE COIL
1. Check the armature coil for short circuit as

follows:

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.

4. Check the insulation between commutator

segments and armature coils. The armature coils
are properly insulated if no continuity is present.

5. Check continuity between a segment and another.

There is no open circuit in the tested coil if there is
continuity.

MAGNETIC SWITCH

1. Coil open circuit test

•

Check that there is continuity between the M
terminal and body A.

•

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.

•

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.

AK202733

Growler

AB

AK202734

AK202713

AK202891

A

M terminal

AB

AK202892

M terminal

B terminal

AB

AK202893

M terminal

B terminal

AB

IGNITION SYSTEM

ENGINE ELECTRICAL

16-30

IGNITION SYSTEM

GENERAL INFORMATION

M1163000100335

<4G63>

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
primary side of ignition coil A generates a high
voltage in the secondary side of ignition coil A. The
high voltage 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
interrupted 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
conditions. 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
altitudes, the ignition timing is slightly advanced to
provide optimum performance.
When the automatic transmission shifts gears, the
ignition timing is also retarded in order to reduce
output torque, thereby alleviating shifting shocks.

SYSTEM DIAGRAM

AK101074

Air flow sensor

Intake air temperatur
sensor

Engine coolant
temperature sensor

Camshaft position
sensor

Crank angle sensor

Barometric pressure
sonsor

Detonatoin sensor

Ignition switch-ST

Engine-ECU
<M/T> or
Engine-A/T-
ECU <A/T>

Ignition coil B

Cylinder No.

2

3

4

AF

1

Spark plug

Ignition coil A

Ignition
switch

Battery

IGNITION SYSTEM

ENGINE ELECTRICAL

16-31

IGNITION COIL SPECIFICATION

SPARK PLUG SPECIFICATIONS

<4G69>

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
primary side of an ignition coil generates a high
voltage in the secondary side of ignition coil. The
high voltage thus generated is applied to the spark
plugs to generate sparks. The engine-ECU <M/T> or
engine-A/T-ECU <A/T> turns the power transistors
inside the ignition coils alternately on and off.This
causes the primary currents in the ignition coils to be
alternately interrupted 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 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.

SYSTEM DIAGRAM

Item

Specification

Type

Molded 2-coil

Item

Specification

NGK

IGR6A11

AK303631

Air flow sensor

Intake air temperatur
sensor

Engine coolant
temperature sensor

Accelerator pedal
position sensor

Camshaft position
sensor

Crank angle sensor

Barometric pressure
sonsor

Detonatoin sensor

Vehicle speed signal
Inhibitor switch

Ignition switch-ST

Engine-ECU
<M/T> or
Engine-A/T-
ECU <A/T>

Ignition coil

Cylinder No.

2

3

4

AB

1

Spark plug

Ignition
switch

Battery

IGNITION SYSTEM

ENGINE ELECTRICAL

16-32

IGNITION COIL SPECIFICATION

SPARK PLUG SPECIFICATIONS

SERVICE SPECIFICATIONS

M1163000300209

IGNITION COIL <4G63>

SPARK PLUG

RESISTIVE CORD <4G63>

SPECIAL TOOL

M1163000600200

Item

Specification

Type

Molded 4-coil

Item

Specification

NGK

LZFR6AI

Item

Standard value

Secondary coil resistance k

Ω

8.5

−

11.5

Item

Standard value

Limit

Spark plug gap mm

4G63

1.0

−

1.1

1.3

4G69

0.7

−

0.8

1.2

Item

Standard value

Limit

Resistance k

Ω

−

Maximum 19

Tool

Number

Name

Use

MD998773

Detonation sensor
wrench

Detonation sensor
removal and installation