Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 364

IGNITION SYSTEM

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ENGINE ELECTRICAL

16-33

The engine control module detects the crankshaft
position by the crankshaft position sensor. This
sensor is installed at the front end of the crankshaft
to provide ignition at the most appropriate timing for
the engine operating condition.

When the engine is cold, the ignition timing is slightly
advanced to provide optimum performance to the
operating condition.

SPECIAL TOOLS

M1163000600051

AKX01291

INTAKE AIR TEMPERATURE SENSOR

BAROMETRIC PRESSURE SENSOR

CRANKSHAFT POSITION SENSOR

CAMKSHAFT
POSITION
SENSOR

IGNITION
POWER
TRANSIST-
OR

VEHICLE SPEED SENSOR

PARK/NEUTRAL POSITION SWITCH <A/T>

IGNITION SWITCH-ST

KNOCK SENSOR

ENGINE COOLANT TEMPERATURE
SENSOR

VOLUME AIR FLOW SENSOR

ECM
<M/T>,
PCM
<A/T>

TO TACHOMETER

IGNITION COIL

DISTRIBUTOR

IGNITION
SWITCH

BATTERY

SPARK PLUGS

AB

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB991348
Test harness set

Tool not available

Inspection of ignition
primary voltage (Ignition
power transistor
connection)

MD998773
Knock sensor wrench

MD998773-01

Knock sensor removal
and installation

MB991348

MD998773

IGNITION SYSTEM

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ENGINE ELECTRICAL

16-34

ON-VEHICLE SERVICE

SPARK PLUG CABLE TEST

M1163000900030

WARNING

Wear rubber gloves while performing this test.

1. Disconnect, one at a time, each of the spark plug cables

while the engine is idling to check whether the engine's
running performance changes or not.

2. If the engine performance does not change, check the

resistance of the spark plug cable, and check the spark plug
itself.

IGNITION COIL CHECK

M1163001200056

<2.4L ENGINE

−

With built-in ignition power

transistor>

Check by the following procedure, and replace the coil if there
is a malfunction.
SECONDARY COIL RESISTANCE CHECK
Measure the resistance between the high-voltage terminals of
the ignition coil.

Standard value: 8.5

−

11.5 k

Ω

PRIMARY COIL AND IGNITION POWER TRANSISTOR
CONTINUITY CHECK
NOTE: An analog-type ohmmeter should be used.

NOTE: Connect the negative (-) probe of the ohmmeter to
terminal 1.

AKX01263AB

SPARK PLUG CABLE TEST

AKX01264

AKX01265AB

1.5V

1 2 3

+

-

IGNITION SYSTEM

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ENGINE ELECTRICAL

16-35

CAUTION

This test must be performed quickly (in less than 10
seconds) to prevent coil from burning and ignition power
transistor from breaking.

IGNITION COIL CHECK

M1163001200078

<3.0L ENGINE>

1. Measurement of the primary coil resistance

Measure the resistance between connector terminals 1 and
2 of the distributor.

Standard value: 0.56

−

0.68

Ω

2. Measurement of the secondary coil resistance

Measure the resistance between the high-voltage terminal
and connector terminal 1.

Standard value: 9.4

−

12.8 k

Ω

IGNITION COIL POWER TRANSISTOR
CONTINUITY CHECK

M1163001300042

<3.0L ENGINE>

NOTE: An analog-type ohmmeter should be used.

NOTE: Connect the negative (-) probe of the ohmmeter to
terminal 2.

CAUTION

This test must be performed quickly (in less than 10
seconds) to prevent coil from burning and ignition power
transistor from breaking.
Replace the ignition power transistor if there is a malfunction.

VOLTAGE: 1.5V

BATTERY
POWER SUPPLY
TERMINAL

SPECIFIED
CONDITION

When current is
flowing

2

−

3

1

−

2

When current is not
flowing

-

-

AKX01266

HIGH-VOLTAGE
TERMINAL

1 2 3 4 5 6 7

AB

VOLTAGE: 1.5V

BATTERY
POWER SUPPLY
TERMINAL

SPECIFIED
CONDITION

When current is
flowing

3

−

4

2

−

3

When current is not
flowing

-

-

AKX01267

1.5V

1 2 3 4 5 6 7

+

-

AB

IGNITION SYSTEM

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ENGINE ELECTRICAL

16-36

IGNITION FAILURE SENSOR CHECK

M1163003000036

<2.4L ENGINE>

NOTE: An analog-type ohmmeter should be used.
Check that the resistance between terminals 3 and 4 is at the
standard value.

Standard value: 0.1

Ω

or less

SPARK PLUG CABLE RESISTANCE CHECK

M1163001400049

Measure the resistance of the all spark plug leads.
1. Check the cap and coating for cracks.

2. Measure the resistance.

Limit: 22 k

Ω

SPARK PLUG TEST

M1163001500079

1. Remove the spark plug and connect to the spark plug cable.

2. Ground the spark plug outer electrode (body), and crank the

engine.
Check that there is an electrical discharge between the
electrodes at this time.

AKX01268 AB

1 2 3 4

AKX00382

AKX00432

SPARK PLUG

AB

AKX00277

DEFECTIVE INSULATION

DEFECTIVE INSULATION

DEFECTIVE
INSULATION

GOOD

AB