Mitsubishi Outlander XL. Manual - part 405

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: V.C.I.

｠

MB991827: USB Cable

｠

MB991910: Main Harness A

STEP 1. Check harness connector C-304, C-307, C314 and
C-317 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 fuel pump relay.
Refer to Fuel Pump Relay Continuity Check P.13Aa-17.

Q:Is the measured resistance normal?

YES:

 Go to Step 3.

NO:

 Replace the fuel pump relay. Then confirm that the

malfunction symptom is eliminated.

STEP 3. Measure the power supply voltage at ETACS-ECU
harness side connector C-307.

(1)

Disconnect the connector C-307 and measure at the harness
side.

AA00

1

2

C-307 harness
connector:
component side 

ZK603198

(2)

Measure the voltage between terminal No. 1 and ground.

｠

Voltage should measure battery positive voltage.

Q:Is  battery  positive  voltage  (approximately  12  volts)

present?

YES:

 Go to Step 4.

NO:

 Repair harness wire between relay box and ETACS-ECU

connector C-307 (terminal No. 1) because of open circuit.
Then confirm that the malfunction symptom is eliminated.

STEP 4. Check connector D-20 at fuel pump for damage.

Q:Is the 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. Check the fuel pump operation.

(1)

Disconnect fuel pump connector D-20.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-815

SYMPTOM PROCEDURES

ZK603199AA00

Fuel punp side
connector

1 2 3

4 5

(2)

Use jumper wires to connect fuel pump connector terminal
No. 5 to the positive battery terminal and terminal No. 4 to
the negative battery terminal.

｠

An operating sound of the fuel pump should be heard.

Q:Is the fuel pump operating properly?

YES:

 Go to Step 6.

NO:

 Replace the fuel pump. Then confirm that the

malfunction symptom is eliminated.

STEP 6. Check for continuity at fuel pump harness side
connector D-20.

(1)

Disconnect the connector D-20 and measure at the harness
side.

ZK603200AA00

1

2

3

4

5

D-20 harness connector:
component side 

(2)

Check for the continuity between terminal No. 4 and ground.

｠

Should be less than 2 ohms.

Q:Does continuity exist?

YES:

 Go to Step 7.

NO:

 Repair harness wire between fuel pump connector D-20

(terminal No. 4) and ground because of open circuit or
harness damage. Then confirm that the malfunction symptom
is eliminated.

STEP 7. Check for open circuit and short circuit to ground
and harness damage between ETACS-ECU connector
C-314 (terminal No. 1) and fuel pump connector D-20
(terminal No. 5).

(1)

Disconnect the connector C-314 and D-20 measure at the
harness side.

13Ab-816

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES

ZK603201AA00

1

2

3

4

5

D-20 Harness connector:
component side 

1

2

C-314 harness
connector:
component side 

(2)

Measure the resistance between connector C-314 (terminal
No. 1) and connector D-20 (terminal No. 5).

｠

Should be less than 2 ohms.

ZK603202AA00

1

2

3

4

5

D-20 Harness connector:
component side 

(3)

Check for the continuity between connector D-20 (terminal
No. 5) and ground.

｠

Not continuity.

Q:Is the harness wire in good condition?

YES:

 Go to Step 8.

NO:

 Repair it. Then confirm that the malfunction symptom

is eliminated.

STEP 8. Check connector B-11 at ECM 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. Measure the power supply voltage at ECM
connector B-11.

(1)

Disconnect the connector B-11 and measure at the harness
side.

(2)

Turn the ignition switch to the "ON" position.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-817

SYMPTOM PROCEDURES

ZK603203

71 72 73 74 75 76 77 78 79 80 81 82

83 84 85 86 87 88 89 90 91 92 93 94

95 96 97 98 99

100 101 102 103 104

112 113 114

109

108

107

110 111

115 116

106

105

118

117

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

AA00

B-11 harness
connector:
component side 

(3)

Measure the voltage between terminal No. 96 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 ECM. When the ECM is replaced, register

the ID code. Refer to GROUP 42B, ID Code Registration
Judgment Table <Vehicles with KOS> P.42B-12or GROUP
42C, ID Code Registration Judgment Table <Vehicles with
WCM> P.42C-8.

NO:

 Repair harness wire between ETACS-ECU connector

C-304 (terminal No. 11) and ECM connector B-11 (terminal
No. 96) because of open circuit. Then confirm that the
malfunction symptom is eliminated.

13Ab-818

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES