Mitsubishi Galant (2004+). Manual - part 1060

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1057

STEP 5. Check the circuit at ignition coil harness side 
connector B-101, B-102, B-117 and B-118.
(1) Disconnect the connectors B-101, B-102, B-117 and B-118 

and measure at the harness side.

(2) Crank the engine.

(3) Measure the voltage between terminal No. 3 and ground.

• Voltage should be 0.3 and 3.0 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 0.3 and 3.0 volts?

YES : Go to Step 8.
NO :  Go to Step 6.

STEP 6. Check harness connector B-23 at PCM for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 7.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

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2

3

AK303919

B-101(GR)

B-102 (GR) B-117 (GR)

B-118 (GR)

CONNECTORS: B-101, B-102, B-117, B-118

HARNESS CONNECTOR:
COMPONENT SIDE

AB

AK302148

1

2

3

B-101, B-102, B-117, B-118
HARNESS CONNECTORS:
COMPONENT SIDE

AD

127 126 125 124 123 122 121

133 132 131 130 129 128

140 139 138 137 136 135 134

146 145 144 143 142 141

153 152 151 150 149 148 147

AK303058

HARNESS CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-23

B-23

PCM

AB

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1058

STEP 7. Check for open circuit and short circuit to ground 
between ignition coil connector and PCM connector.

a. Check the harness wire between ignition coil connector 

B-101 (terminal No. 3) and PCM connector B-23 (terminal 
No. 151) at ignition coil 1.

b. Check the harness wire between ignition coil connector 

B-118 (terminal No. 3) and PCM connector B-23 (terminal 
No. 143) at ignition coil 2.

c. Check the harness wire between ignition coil connector 

B-102 (terminal No. 3) and PCM connector B-23 (terminal 
No. 150) at ignition coil 3.

d. Check the harness wire between ignition coil connector 

B-117 (terminal No. 3) and PCM connector B-23 (terminal 
No. 148) at ignition coil 4.

Q: Is the harness wire in good condition?

YES : Replace the PCM. Then confirm that the malfunction 

symptom is eliminated.

NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

1

2

3

AK303919

B-101(GR)

B-102 (GR) B-117 (GR)

B-118 (GR)

CONNECTORS: B-101, B-102, B-117, B-118

HARNESS CONNECTOR:
COMPONENT SIDE

AB

127 126 125 124 123 122 121

133 132 131 130 129 128

140 139 138 137 136 135 134

146 145 144 143 142 141

153 152 151 150 149 148 147

AK303058

HARNESS CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-23

B-23

PCM

AB

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1059

STEP 8. Check for harness damage between ignition coil 
connector and PCM connector.

a. Check the harness wire between ignition coil connector 

B-101 (terminal No. 3) and PCM connector B-23 (terminal 
No. 151) at ignition coil 1.

b. Check the harness wire between ignition coil connector 

B-118 (terminal No. 3) and PCM connector B-23 (terminal 
No. 143) at ignition coil 2.

c. Check the harness wire between ignition coil connector 

B-102 (terminal No. 3) and PCM connector B-23 (terminal 
No. 150) at ignition coil 3.

d. Check the harness wire between ignition coil connector 

B-117 (terminal No. 3) and PCM connector B-23 (terminal 
No. 148) at ignition coil 4.

Q: Is the harness wire in good condition?

YES : Replace the PCM. Then confirm that the malfunction 

symptom is eliminated.

NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

1

2

3

AK303919

B-101(GR)

B-102 (GR) B-117 (GR)

B-118 (GR)

CONNECTORS: B-101, B-102, B-117, B-118

HARNESS CONNECTOR:
COMPONENT SIDE

AB

127 126 125 124 123 122 121

133 132 131 130 129 128

140 139 138 137 136 135 134

146 145 144 143 142 141

153 152 151 150 149 148 147

AK303058

HARNESS CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-23

B-23

PCM

AB

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1060

INSPECTION PROCEDURE 32: A/C system.

.

COMMENT

• When the A/C is "ON" the PCM turns "ON" the 

power transistor in the PCM. The PCM delays 
A/C engagement momentarily while it increases 
idle r/min. Then the A/C compressor clutch relay 
coil will be energized. 
With this, the A/C compressor clutch relay turns 
"ON", and the A/C compressor clutch operates.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this case: )

• Malfunction of the A/C control system.

• Improper connector contact, open circuit or 

shorted harness wire.

• Malfunction of the PCM.

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57

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64 65 66 67 68 69

70

71 72 73 74 75

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83

AK303939

GREEN

81

POWERTRAIN CONTROL 
MODULE (PCM)

A/C COMPRESSOR CLUTCH RELAY

A/C Circuit

B-21

AK303119

CONNECTOR: B-21

PCM

AB

AIR CLEANER

B-21