Mitsubishi Montero (2002-2004). Manual — part 760

TSB Revision

SYMPTOM PROCEDURES

13Ad-89

STEP 4. Measure the power supply voltage at fuel pump
relay 1 harness side connector B-19X.
(1) Disconnect the connector B-19X and measure at the

harness side.

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

• Voltage should measure battery positive voltage.

Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 5.
NO : Check harness connector A-05 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 fuse box
(fuse 6) and fuel pump relay 1 connector B-19X
(terminal No. 3) because of open circuit. Then confirm
that the malfunction symptom is eliminated.

AK201175

2 1

3

4

B-19X

AB

CONNECTOR: B-19X

HARNESS
CONNECTOR:
COMPONENT SIDE

2 1

3

4

AK201382

B-19X HARNESS
CONNECTOR:
COMPONENT SIDE

AK201382AB

TSB Revision

SYMPTOM PROCEDURES

13Ad-90

STEP 5. Measure the power supply voltage at fuel pump
relay 2 harness side connector B-24X.
(1) Disconnect the connector B-24X and measure at the

harness side.

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

(3) Measure the voltage between terminal No. 4 and ground.

• Voltage should measure 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 6.
NO : Check harness connectors D-208, D-221, E-111 at

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

P.00E-2

. If intermediate

connector is in good condition, repair harness wire
between ignition switch connector D-204 (terminal
No. 2) and fuel pump relay 2 connector B-24X
(terminal No. 4) because of open circuit. Then confirm
that the malfunction symptom is eliminated.

STEP 6. Check for continuity at fuel pump relay 2 harness
side connector B-24X.
(1) Disconnect the connector B-24X and measure at the

harness side.

(2) Check for the continuity between terminal No. 2 and

ground.

• Should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 7.
NO : Repair harness wire between fuel pump relay 2

connector B-24X (terminal No. 2) and ground
because of open circuit. Then confirm that the
malfunction symptom is eliminated.

AK201177

2 1

3

4

B-24X

AB

CONNECTOR: B-24X

HARNESS
CONNECTOR:
COMPONENT SIDE

2 1

3

4

AK201383

B-24X HARNESS
CONNECTOR:
COMPONENT SIDE

AK201383AB

AK201177

2 1

3

4

B-24X

AB

CONNECTOR: B-24X

HARNESS
CONNECTOR:
COMPONENT SIDE

AK201384

2 1

3

4

B-24X HARNESS
CONNECTOR:
COMPONENT SIDE

AK201384AB

2 1

3

4

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SYMPTOM PROCEDURES

13Ad-91

STEP 7. Measure the power supply voltage at fuel pump
relay 1 harness side connector B-19X.
(1) Disconnect the connector B-19X and measure at the

harness side.

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

(3) Measure the voltage between terminal No. 4 and ground.

• Voltage should measure battery positive voltage.

Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 8.
NO : Repair harness wire between fuel pump relay 1

connector B-19X (terminal No. 4) and fuel pump relay
2 connector B-24X (terminal No. 4) because of open
circuit. Then confirm that the malfunction symptom is
eliminated.

STEP 8. Check for open circuit and short circuit to ground
and harness damage between fuel pump relay 1 connector
B-19X (terminal No. 1) and fuel pump relay 2 connector B-
24X (terminal No. 1).
NOTE: Repair or replace them. After to GROUP 00E, Harness
Connector Inspection

P.00E-2

. Then check that the malfunc-

tion is eliminated.
Q: Is the harness wire in good condition?

YES : Go to Step 9.
NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

STEP 9. Check connector G-04 at fuel pump for damage.
Q: Is the connector in good condition?

YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

AK201175

2 1

3

4

B-19X

AB

CONNECTOR: B-19X

HARNESS
CONNECTOR:
COMPONENT SIDE

AK201385

2 1

3

4

B-19X HARNESS
CONNECTOR:
COMPONENT SIDE

AK201385AB

2 1

3

4

AK201178

2 1

3

4

B-19X

B-24X

AB

CONNECTORS: B-19X, B-24X

HARNESS
CONNECTOR:
COMPONENT SIDE

AK201553

1

2

3

4

5

G-04(GR)

AB

CONNECTOR: G-04

HARNESS
CONNECTOR:
COMPONENT SIDE

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SYMPTOM PROCEDURES

13Ad-92

STEP 10. Check the fuel pump operation.
(1) Disconnect fuel pump connector G-04.

(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 11.
NO : Replace the fuel pump. Then confirm that the

malfunction symptom is eliminated.

STEP 11. Check for continuity at fuel pump harness side
connector G-04.
(1) Disconnect the connector G-04 and measure at the harness

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 12.
NO : Check harness connector F-07 at intermediate

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

P.00E-2

. If intermediate connector is in

good condition, repair harness wire damage between
fuel pump connector G-04 (terminal No. 4) and
ground because of open circuit or harness damage.
Then confirm that the malfunction symptom is
eliminated.

AK201553

1

2

3

4

5

G-04(GR)

AB

CONNECTOR: G-04

HARNESS
CONNECTOR:
COMPONENT SIDE

AKX01439

FUEL PUMP SIDE
CONNECTOR

AB

1 2 3

4 5

AK201553

1

2

3

4

5

G-04(GR)

AB

CONNECTOR: G-04

HARNESS
CONNECTOR:
COMPONENT SIDE

AKX01440

G-04 HARNESS
SIDE CONNECTOR

3 2 1

5 4

AB