Mitsubishi Galant 9G. Manual — part 906

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1066

STEP 13. Check connector B-19 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

AK303153

4 3 2 1

7 6 5

9 8

11 10

14 13 12

18 17 16 15

CONNECTOR: B-19

PCM

AB

AIR CLEANER

HARNESS CONNECTOR:
COMPONENT SIDE

B-19 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1067

STEP 14. Measure the power supply voltage at PCM
connector B-19.
(1) Disconnect the connector B-19 and measure at the harness

side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 6 and ground.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Replace the PCM. Then confirm that the malfunction

symptom is eliminated.

NO : Check harness connectors C-29 and C-211 at

intermediate connector for damage, and repair or
replace as required. Refer to, GROUP 00E, Harness
Connector Inspection

P.00E-2

. If intermediate

connectors are in good condition, repair harness wire
between fuel pump relay 2 connector C-208 (terminal
No. 2) and PCM connector B-19 (terminal No. 6)
because of open circuit. Then confirm that the
malfunction symptom is eliminated.

AK303153

4 3 2 1

7 6 5

9 8

11 10

14 13 12

18 17 16 15

CONNECTOR: B-19

PCM

AB

AIR CLEANER

HARNESS CONNECTOR:
COMPONENT SIDE

B-19 (B)

4 3 2 1

7 6 5

9 8

11 10

14 13 12

18 17 16 15

AK203275

B-19 HARNESS
CONNECTOR:
COMPONENT SIDE

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1068

INSPECTION PROCEDURE 30: Ignition Switch-ST System and Transmission Range Switch System

3

4 5 6

1 2

5 6

1 2 3 4

7

8

9 10

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

1 2

3 4 5

14

15

8 9

12 13

6 7

10 11
16 17

AK400833

BLA

CK-

RED

BLA

CK-

RED

BLA

CK-

YELLO

W

BLA

CK-

YELLO

W

BLA

CK-

YELLO

W

P

R

L

2

3 D N

LOCK

ACC

5

IGNITION
SWITCH

R

IG2

IG1

ST

30

9

10

TRANSMISSION RANGE
SWITCH

POWERTRAIN
CONTROL
MODULE (PCM)

B-110

MU802355

83

C-308

C-29

A-13

Ignition Switch-ST and Transmission Range Switch Circuit

B-21

3

STARTING
SYSTEM

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1069

.

COMMENT

• If the selector lever is moved to "P" or "N" range

and the ignition switch is turned to "START" posi-
tion, battery positive voltage is supplied to PCM
(terminal No. 83) through the ignition switch and
transmission range switch. Because of this, the
PCM detects that the engine is cranking.

• The transmission range switch detects the trans-

mission range (P, N or other ranges) and con-
verts it to a voltage signal (high or low). Then the
transmission range switch sends that signal to
the PCM.

If the selector lever is moved to "P" or "N" range
with the ignition switch turned on (except
"START" position), continuity will exist between
the PCM and ground through the transmission
range switch and starter motor. The terminal volt-
age of the PCM will become low. If the selector
lever is moved to the other ranges, continuity will
be lost between the PCM and ground. The termi-
nal voltage of the PCM will become high.

.

TROUBLESHOOTING HINTS (The most
likely caused for this code to be set are:)

• Malfunction of the ignition switch.

• Malfunction of the transmission range switch.

• Improper connector contact, open circuit or

short-circuit in the harness wire.

• Malfunction of the PCM.

AK303934AB

CONNECTOR: B-110

A/T CONTROL
SOLENOID
VALVE ASSEMBLY

TRANSMISSION
RANGE SWITCH

B-110 (B)

AK303119

CONNECTOR: B-21

PCM

AB

AIR CLEANER

B-21

AK303872AB

A-13 (GR)

CONNECTOR: A-13

AK303918AB

C-29

CONNECTOR: C-29

AK303923AB

CONNECTOR: C-308

C-308