Mitsubishi Montero (2004+). Manual - part 251

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-491

STEP 3. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function

− OBD-II Drive Cycle − Procedure 6 − 

Other Monitor 

P.13A-4

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0340 set?

YES : Replace the PCM. Then go to Step 21.
NO :  It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-6

.

STEP 4. Check connector B-08 at camshaft position 
sensor intermediate connector 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 go to Step 21.

STEP 5. Measure the sensor supply voltage at camshaft 
position sensor intermediate connector B-08.
(1) Disconnect the camshaft position sensor intermediate 

connector B-08 and measure at the female side.

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

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

• Voltage should be between 4.8 and 5.2 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.8 and 5.2 volts?

YES : Go to Step 10.
NO :  Go to Step 6.

AK302432

3 2 1

B-08(GR)

3 2 1

AB

CONNECTOR: B-08

HARNESS CONNECTOR:
COMPONENT SIDE

3 2 1

AK302432

3 2 1

B-08(GR)

3 2 1

AB

CONNECTOR: B-08

HARNESS CONNECTOR:
COMPONENT SIDE

3 2 1

1

2

3

AK302947

B-08 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-492

STEP 6. Measure the sensor supply voltage at PCM 
connector D-134 by backprobing.
(1) Do not disconnect the PCM connector D-134.
(2) Disconnect the camshaft position sensor intermediate 

connector B-08.

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

(4) Measure the voltage between terminal No. 71 and ground 

by backprobing.

• Voltage should be between 4.8 and 5.2 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.8 and 5.2 volts?

YES : Go to Step 7.
NO :  Go to Step 8.

STEP 7. Check connector D-134 at PCM for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between camshaft position 

sensor intermediate connector B-08 (terminal No. 2) 
and PCM connector D-134 (terminal No. 71) because 
of open circuit. Then go to Step 20.

NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 21.

AK201166

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CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

AK302431

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656667686970 717273
74757677787980 8182
8384

858687

8889

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D-134 HARNESS 
CONNECTOR: 
HARNESS SIDE

AB

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CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-493

STEP 8. Check connector D-134 at PCM 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 go to Step 21.

STEP 9. Check for short circuit to ground between 
camshaft position sensor intermediate connector B-08 
(terminal No. 2) and PCM connector D-134 (terminal No. 
71).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 21.
NO :  Repair it. Then go to Step 21.

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CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

AK302432

3 2 1

B-08(GR)

3 2 1

AB

CONNECTOR: B-08

HARNESS CONNECTOR:
COMPONENT SIDE

3 2 1

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CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-494

STEP 10. Measure the power supply voltage at camshaft 
position sensor intermediate connector B-08.
(1) Disconnect the connector B-08 and measure at the female 

side.

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

(3) Measure the voltage between terminal No. 3 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 12.
NO :  Go to Step 11.

STEP 11. Check connector B-22X at the MFI relay for 
damage.
Q: Is the connector in good condition?

YES : Repair harness wire between MFI relay connector 

B-22X (terminal No. 1) and camshaft position sensor 
intermediate connector B-08 (terminal No. 3) because 
of open circuit or short circuit to ground. Then go to 
Step 20.

NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 21.

AK302432

3 2 1

B-08(GR)

3 2 1

AB

CONNECTOR: B-08

HARNESS CONNECTOR:
COMPONENT SIDE

3 2 1

1

2

3

AK302948

B-08 HARNESS 
CONNECTOR: 
MALE SIDE

AB

AK200951

2 1

3

4

B-22X

AB

CONNECTOR: B-22X

HARNESS 
CONNECTOR: 
COMPONENT SIDE