Mitsubishi Colt Ralliart. Manual — part 125

IGNITION SYSTEM

ENGINE ELECTRICAL

16-34

SPARK PLUG SPECIFICATIONS

Item

Specification

BOSCH <4A9>

FR7SI30

NGK <4G1>

IZFR6C-K

SERVICE SPECIFICATIONS

M1163000300373

SPARK PLUG

Item

Standard value

Limit

Spark plug gap mm

4A9

1.0

− 1.1

1.4

4G1

0.7

− 0.8

0.95

SEALANT <4A9>

M1163000500043

Item

Specified sealant

Remark

Cylinder block

LOCTITE 5971 or exact equivalent

Semi-drying sealant

ON-VEHICLE SERVICE

IGNITION COIL (WITH BUILT-IN POWER TRANSISTOR) CHECK

M1163001200711

Check by the following procedure, and replace if
there is a malfunction.

PRIMARY COIL AND POWER TRANSIS-
TOR CONTINUITY CHECK

NOTE:

.

•

AK202356

1 2 3

AG

4.5 – 9.0 V

–

+

–

+

An analogue-type circuit tester should be used.

•

Connect the negative (-) prove of the circuit tester
to terminal No. 1.

CAUTION

This test must be performed quickly (in less

than 10 seconds) to prevent coil from burning
and power transistor from breakage.
Connect and disconnect 4.5

− 9.0 V battery between

terminal No. 2 and No. 3, and observe the ohmmeter
whether there is continuity or not.

4.5

− 9.0 V power

supply between 2

− 3

Continuity between

1

− 2

When current is flowing

Continuity

When current is not
flowing

No continuity

SECONDARY COIL CHECK

NOTE: It is impossible to check the secondary coil
through the continuity check as a diode is integrated
in the secondary coil circuit of this ignition coil.
Accordingly, check the secondary coil in the following
procedure.
1. Disconnect the ignition coil connector.
2. Remove the ignition coil and install a good spark

plug to the ignition coil.

3. Connect the ignition coil connector.
4. Earth the side electrode of the spark plug and

crank the engine.

5. Check that spark is produced between the

electrodes of the spark plug.

6. If no spark plug is produced, replace the ignition

coil with a good one and recheck.

7. If spark is produced with the good ignition coil,

replace the old one as it is faulty. If no spark is
produced again, the ignition circuit is suspected
as faulty. Check the ignition circuit.

Main

Index

Group

TOC

IGNITION SYSTEM

ENGINE ELECTRICAL

16-35

SPARK PLUG CHECK AND CLEANING

M1163004300933

CAUTION

• Never attempt to adjust the gap of the iridium

plug.

• Do not attempt to clean the spark plug

because it may result in damage to the elec-
trode. However, if remarkable carbon deposits
must be removed, using a plug cleaner, com-
plete the cleaning within 20 seconds to pro-
tect the electrode. Do not use a wire brush.

NOTE: As the prospective distance for this spark
plug replacement is 100,000 km. If the plug gap and
insulation resistance are normal, check the plug state
and clean it if necessary.

SPARK PLUG GAP CHECK

AKX01272AG

Plug gap gauge

Measurement
direction

Check the plug gap with the wire type plug gap
gauge. Replace it if the limit is exceeded.

Standard value, limit:

Manufacturer Type

Standard
value (mm)

Limit (mm)

BOSCH
<4A9>

FR7SI30

1.0

− 1.1

1.4

NGK <4G1> IZFR6C-K

0.7

− 0.8

0.95

SPARK PLUG INSULATION RESISTANCE
CHECK

AK503737

1. Measure the insulation resistance. If the insulation

resistance of the spark plug is not within the
limited value, clean the plug within 20 seconds
using a plug cleaner.

2. After cleaning, measure the insulation resistance

again. Replace the plug unless it is within the
limited value.

Limit: 10 M

Ω

CAMSHAFT POSITION SENSOR CHECK

M1163004400576

Check the camshaft position sensor circuit if
self-diagnosis code No. P0340 is shown.

(Refer to GROUP 13A

− Troubleshooting − Inspec-

tion chart for diagnosis code

P.13A-20

<4A9>,

GROUP 13B

− Troubleshooting − Inspection chart

for diagnosis code

P.13B-18

<4G1>).

CRANK ANGLE SENSOR CHECK

M1163004500636

Check the crank angle sensor circuit if self-diagnosis
code No. P0335 is shown.

(Refer to GROUP 13A

− Troubleshooting − Inspec-

tion chart for diagnosis code

P.13A-20

<4A9>,

GROUP 13B

− Troubleshooting − Inspection chart

for diagnosis code

P.13B-18

<4G1>).

DETONATION SENSOR CHECK

M1163002900285

Check the detonation sensor circuit if self-diagnosis
code No. P0325 is shown.

(Refer to GROUP 13A

− Troubleshooting − Inspec-

tion chart for diagnosis code

P.13A-20

<4A9>,

GROUP 13B

− Troubleshooting − Inspection chart

for diagnosis code

P.13B-18

<4G1>).

Main

Index

Group

TOC

IGNITION SYSTEM

ENGINE ELECTRICAL

16-36

IGNITION COIL

REMOVAL AND INSTALLATION <4A9>

M1163004000783

Pre-removal Operation
• Engine Cover Removal (Refer to GROUP 11A, Camshaft

P.11A-17

).

Post-installation Operation
• Engine Cover Installation (Refer to GROUP 11A, Cam-

shaft

P.11A-17

).

AC312256 AB

8.4 ± 0.6 N·m

25 ± 5 N·m

1

3

2

Removal steps

1.

Ignition coil connectors

2.

Ignition coils

3.

Spark plugs

Removal steps (Continued)

Main

Index

Group

TOC

IGNITION SYSTEM

ENGINE ELECTRICAL

16-37

REMOVAL AND INSTALLATION <4G1>

M1163004000794

Pre-removal Operation
• Engine Cover Removal (Refer to GROUP 11C, Camshaft

and Valve Stem Seal

P.11C-20

).

Post-installation Operation
• Engine Cover Installation (Refer to GROUP 11C, Cam-

shaft and Valve Stem Seal

P.11C-20

).

AC402111AB

10 ± 2 N·m

25 ± 5 N·m

1

3

2

Removal steps

1.

Ignition coil connectors

2.

Ignition coils

3.

Spark plugs

Removal steps (Continued)

Main

Index

Group

TOC