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Mitsubishi Outlander GS45X. Manual - part 739

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-779

DIAGNOSIS

STEP 1. Check harness connector A-33X at MFI relay for
damage.
Q: Is the 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.

STEP 2. Check the MFI relay.
(1) Remove the MFI relay.
(2) Check for continuity between the MFI relay terminals No. 1

and No. 3.

• There should be continuity.

(3) Use jumper wires to connect MFI relay terminal No. 3 to the

positive battery terminal and terminal No. 1 to the negative
battery terminal.

(4) Check for continuity between the MFI relay terminals No. 4

and No. 2 while connecting and disconnecting the jumper
wire at the negative battery terminal.

• Continuity (2 Ω or less) <Negative battery terminal con-

nected>

• Should be open loop. <Negative battery terminal discon-

nected>

(5) Install the MFI relay.
Q: Is the measured resistance within the specified range?

YES : Go to Step 3.
NO : Replace the MFI relay. Then confirm that the

malfunction symptom is eliminated.

AK703903

MFI relay side
connector

AK703904AB

MFI
relay side
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-780

STEP 3. Measure the power supply voltage at MFI relay
harness side connector A-33X.
(1) Disconnect the connector A-33X and measure at the

harness side.

(2) Measure the voltage between terminals No. 3, No. 4 and

ground.

• Voltage should be battery positive voltage.

Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 4.
NO : Repair harness wire between fusible link (36) and MFI

relay connector A-33X (terminals No. 3, No. 4)
because of open circuit or short circuit to ground.
Then confirm that the malfunction symptom is
eliminated.

STEP 4. Check harness connector B-11 at ECM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

STEP 5. Measure the ignition switch-IG signal voltage at
ECM harness side connector B-11.
(1) Disconnect the connector B-11 and measure at the harness

side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 92 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 : Go to Step 11.
NO : Go to Step 6.

AK704114

A-33X harness
connector:
component side

82 81 80 79 78 77 76 75 74 73 72 71

94 93 92 91 90 89 88 87 86 85 84 83

99 98 97 96 95

100

101

102

103

104

105

106

112

113

114

109 108

107

110

111

115

116

117

118

AK700211AB

B-11 harness
connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-781

STEP 6. Check harness connector C-304, C-317 at
ETACS-ECU connector for damage.
Q: Is the 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.

STEP 7. Measure the ignition switch-IG signal voltage at
ETACS-ECU harness side connector C-317.
(1) Disconnect the connector C-317 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 : Go to Step 10.
NO : Go to Step 8.

STEP 8. Check harness connector C-210 ignition switch
connector for damage.
Q: Is the connector in good condition?

YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

STEP 9. Check the ignition switch
Refer to GROUP 54A, Ignition Switch

− Inspection − Ignition

Switch Continuity Check

P.54A-26

Q: Are there any abnormalities?

YES : Replace the Ignition Switch. Then confirm that the

malfunction symptom is eliminated.

NO : Repair harness wire between Ignition Switch

connector C-210 (terminal No. 2) and ETACS-ECU
connector C-317 (terminal No. 6) because of open
circuit or short circuit to ground. Then confirm that the
malfunction symptom is eliminated.

6 5

4 3 2 1

1110

151413

9 8

AK704302

C-317 harness
connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-782

STEP 10. Check for continuity at ETACS-ECU side
connector C-304 and C-317.
(1) Disconnect the connector C-304, C-317 and measure at the

ETACS-ECU side.

(2) Measure the resistance between connector C-304 (terminal

No. 10) and connector C-317 (terminal No. 6).
NOTE: Connect the (+) side of circuit tester to connector
C-304 (terminal No. 10).

• Should be less than 2 ohms

Q: Is the harness wire in good condition?

YES : Repair harness wire between ETACS-ECU connector

C-304 (terminal No. 10) and ECM connector B-11
(terminal No. 92) because of open circuit or short
circuit to ground. Then confirm that the malfunction
symptom is eliminated.

NO : Replace the ETACS-ECU. Then confirm that the

malfunction symptom is eliminated.

STEP 11. Check harness connector C-304, C-317 at
ETACS-ECU connector for damage.
Q: Is the connector in good condition?

YES : Go to Step 12.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

1 2 3 4

5 6 7

10 11

2 3

AK704304

C-317 ETACS-ECU
side connector

C-304 ETACS-ECU
side connector

( )

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