Mitsubishi Lancer. Manual — part 211

IGNITION SYSTEM

ENGINE ELECTRICAL

16-36

EXAMPLES OF ABNORMAL WAVE-
FORMS

AKX00280

Example 1

• Wave characteristics

Spark line is high and short.

• Cause of problem

Spark plug gap is too large.

AKX00281

Example 2

• Wave characteristics

Spark line is low and long, and is sloping.
Also, the second half of the spark line is distorted.

This could be a result of misfiring.

• Cause of problem

Spark plug gap is too small.

AKX00282

Example 3

• Wave characteristics

Spark line is low and long, and is sloping. How-

ever, there is almost no spark line distortion.

• Cause of problem

Spark plug gap is fouled.

AKX00283

Example 4

• Wave characteristics

Spark line is high and short.
Difficult to distinguish between this and abnormal

waveform example 1.

• Cause of problem

Spark plug cable is nearly falling off (Causing a

dual ignition).

AKX00284

Example 5

• Wave characteristics

No waves in wave damping section.

• Cause of problem

Layer short in ignition coil.

IGNITION SYSTEM

ENGINE ELECTRICAL

16-37

IGNITION COIL RELAY CHECK

M1163006500018

AC301727

2

1

3

4

AC304311AB

Battery

Ignition coil relay

Battery
voltage

Terminal No.to
be connected
to tester

Continuity test
results

Not applied

1

− 4

Open circuit

Connect
terminal No.2
and battery (+)
terminal.
Connect
terminal No.3
and battery (

−)

terminal.

1

− 4

Less than 2
ohms

IGNITION SYSTEM

ENGINE ELECTRICAL

16-38

IGNITION COIL

REMOVAL AND INSTALLATION <4G1>

M1163004000404

AC303965AB

1

1

5

2

2

10 ± 2 N·m

10 ± 2 N·m

25 ± 5 N·m

3

4

4

Removal steps

1.

Ignition coil connector

2.

Spark plug cable

3.

Accelerator cable support clamp
<RHD>

4.

Ignition coil

5.

Spark plug

Removal steps (Continued)

IGNITION SYSTEM

ENGINE ELECTRICAL

16-39

REMOVAL AND INSTALLATION <4G6>

M1163004000415

AC301786

10 ± 2 N·m

25 ± 4 N·m

5

4

2

2

3

3

4

AB

1

3.0 ± 0.5 N·m

Removal steps

1.

Rocker cover centre cover

2.

Ignition coil connector

3.

Spark plug cable

4.

Ignition coil

5.

Spark plug

Removal steps (Continued)