Mitsubishi Galant (2004+). Manual - part 174

IGNITION SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-37

ON-VEHICLE SERVICE

KNOCK CONTROL SYSTEM CHECK

M1163001800081

Check the knock sensor circuit if diagnostic trouble code, No. 
P0325 is shown.

<2.4L ENGINE>

Refer to GROUP 13A, Multiport Fuel Injection (MFI) <2.4L 
Engine> 

− Multiport Fuel Injection (MFI) Diagnosis − Diagnostic 

Trouble Code Procedures 

− DTC P0325 : Knock Sensor Circuit 

P.13A-534

.

<3.8L ENGINE>

Refer to GROUP 13B, Multiport Fuel Injection (MFI) <3.8L 
Engine> 

− Multiport Fuel Injection (MFI) Diagnosis − Diagnostic 

Trouble Code Procedures 

− DTC P0325 : Knock Sensor Circuit 

P.13B-575

.

IGNITION COIL CHECK 

M1163001200380

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

.

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 termi-
nal 1.

CAUTION

This test must be performed quickly (in less than 10 sec-
onds) to prevent coil from burning and ignition power tran-
sistor from breaking.
1. 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.

AK303638 AB

4.5 – 9.0 V

1 2 3

+

–

IGNITION SYSTEM

TSB Revision

ENGINE ELECTRICAL

16-38

2. If results do not agree with the table below, replace the 

primary coil and ignition power transistor assembly.

.

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 new spark plug to the 

ignition coil. 

3. Connect the ignition coil connector.
4. Ground 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 

new one and recheck.

7. If spark is produced with the new 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.

SPARK PLUG TEST

M1163001500143

1. Remove the spark plug and connect to the ignition coil.

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.

4.5 

− 9.0 V POWER SUPPLY

BETWEEN 2 

− 3

CONTINUITY BETWEEN 
1 

− 2

Current flowing

Yes

Current not flowing

No

AKX00432

SPARK PLUG

AB

AKX00277

DEFECTIVE INSULATION

DEFECTIVE INSULATION

DEFECTIVE
INSULATION

GOOD

AB

IGNITION SYSTEM

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ENGINE ELECTRICAL

16-39

SPARK PLUG CHECK AND CLEANING 

M1163004300397

CAUTION

• Do not attempt to adjust the gap of the iridium plug.
• Cleaning of the iridium plug may result in damage to 

the iridium tips. Therefore, if carbon deposits must be 
removed, use a plug cleaner and complete cleaning 
within 20 seconds to protect the electrode. Do not use a 
wire brush.

Check the plug gap and replace if the limit is exceeded.

Standard value: 0.7 

− 0.8 mm (0.028 − 0.031 inch)

Limit: 1.2 mm (0.047 inch)

CAMSHAFT POSITION SENSOR CHECK

M1163004400208

<2.4L ENGINE>

Refer to GROUP 13A, Multiport Fuel Injection (MFI) <2.4L 
Engine> 

− Multiport Fuel Injection (MFI) Diagnosis − Diagnostic 

Trouble Code Procedures 

− DTC P0340 : Camshaft Position 

Sensor Circuit 

P.13A-560

.

<3.8L ENGINE>

Refer to GROUP 13B, Multiport Fuel Injection (MFI) <3.8L 
Engine> 

− Multiport Fuel Injection (MFI) Diagnosis − Diagnostic 

Trouble Code Procedures 

− DTC P0340 : Camshaft Position 

Sensor Circuit 

P.13B-605

.

CRANKSHAFT POSITION SENSOR CHECK

M1163004500261

<2.4L ENGINE>

Refer to GROUP 13A, Multiport Fuel Injection (MFI) <2.4L 
Engine> 

− Multiport Fuel Injection (MFI) Diagnosis − Diagnostic 

Trouble Code Procedures 

− DTC P0335 : Crankshaft Position 

Sensor Circuit 

P.13A-542

.

<3.8L ENGINE>

Refer to GROUP 13B, Multiport Fuel Injection (MFI) <3.8L 
Engine> 

− Multiport Fuel Injection (MFI) Diagnosis − Diagnostic 

Trouble Code Procedures 

− DTC P0335 : Crankshaft Position 

Sensor Circuit 

P.13B-583

.

AKX00383

AKX00383

IRIDIUM TIP

AK

IGNITION SYSTEM

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ENGINE ELECTRICAL

16-40

IGNITION COIL

REMOVAL AND INSTALLATION <2.4L ENGINE>

M1163004000459

Pre-removal and Post-installation Operation
Air Cleaner Resonator Removal and Installation (Refer to 
GROUP 15, Air Cleaner 

P.15-4

).

AC306714

10 ± 2 N·m
89 ± 17 in-lb

25 ± 4 N·m
18 ± 3 ft-lb

1

2

AB

3

REMOVAL STEPS

1.

IGNITION COIL CONNECTORS

2.

IGNITION COILS

3.

SPARK PLUGS

REMOVAL STEPS (Continued)