Mitsubishi Galant 9G. Manual — part 1208

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-1132

NOTE: Check harness after checking intermediate connector
B-32. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection. Then
confirm that the malfunction symptom is eliminated.

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. 150) 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. 144) 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.

e. Check the harness wire between ignition coil connector

B-103 (terminal No. 3) and PCM connector B-23 (terminal
No. 143) at ignition coil 5.

f. Check the harness wire between ignition coil connector

B-114 (terminal No. 3) and PCM connector B-23 (terminal
No. 134) at ignition coil 6.

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.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-1133

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

AK303233

1

2

3

AB

B-118 (GR)

B-102 (GR)

B-101 (GR)

B-117 (GR)

B-103 (GR)

B-114 (GR)

CONNECTOR: B-101, B-102, B-103, B-114,
B-117, B-118

HARNESS CONNECTOR:
COMPONENT SIDE

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) <3.8L ENGINE>

13B-1134

NOTE: Check harness after checking intermediate connector
B-32. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection. Then
confirm that the malfunction symptom is eliminated.

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. 150) 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. 144) 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.

e. Check the harness wire between ignition coil connector

B-103 (terminal No. 3) and PCM connector B-23 (terminal
No. 143) at ignition coil 5.

f. Check the harness wire between ignition coil connector

B-114 (terminal No. 3) and PCM connector B-23 (terminal
No. 134) at ignition coil 6.

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.

INSPECTION PROCEDURE 32: A/C system.

GREEN

AK302882

81

POWERTRAIN CONTROL
MODULE (PCM)

A/C COMPRESSOR CLUTCH
RELAY

A/C Circuit

B-21

52

51

53 54 55 56

57

58 59 60 61 62

63

64 65 66 67 68 69

70

71 72 73 74 75

76

77 78 79 80 81 82

83

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-1135

.

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

short-circuited harness wire.

• Malfunction of the PCM.

DIAGNOSIS

STEP 1. Check harness connector B-21 at PCM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

AK303119

CONNECTOR: B-21

PCM

AB

AIR CLEANER

B-21

AK303018

55

56

54 53 52 51

57

62 61 60 59 58

63

69 68 67 66 65 64

70

75 74 73 72 71

76

82 81 80 79 78 77

83

CONNECTOR: B-21

PCM

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AIR CLEANER

B-21 (B)