Mitsubishi Montero (2004+). Manual - part 185

 

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Mitsubishi Montero (2004+). Manual - part 185

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-227

STEP 3. Measure the sensor output voltage at PCM 
connector D-135 by backprobing

(1) Do not disconnect the connector D-135.
(2) Start the engine and run at idle.

(3) Measure the voltage between terminal No. 117 and ground 

by backprobing.

• Warming up the engine. When the engine is 2,500 r/min, 

the output voltage should repeat 0 volt and 0.6 to 1.0 
volt alternately.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Go to Step 4.
NO :  Go to Step 6.

AK200947

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

AK201408

9192

939495

96979899

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105

113114

115116117

118119120

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107108109

110111112

101102103

104

D-135 HARNESS 
CONNECTOR: 
HARNESS SIDE

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-228

STEP 4. Check harness connector C-14 at right bank 
heated oxygen sensor (rear) and harness connector D-135 
at PCM 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 go to Step 15. 

AK201276

1

2

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4

CONNECTOR: C-14

C-14(GR)

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-229

STEP 5. Using scan tool MB991958, check data list item 69: 
Heated Oxygen Sensor Bank 1, Sensor 2 (right rear).

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991958 to the data reading mode for item 

69, Heated Oxygen Sensor Bank 1, Sensor 2 (right rear).

• Warming up the engine. When the engine is revved, the 

output voltage should repeat 0 volt and 0.6 to 1.0 volt 
alternately.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

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

P.00-6

.

NO :  Replace the PCM. Then go to Step 15.

AK302970

AB

MB991911

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-230

STEP 6. Check harness connector C-14 at right bank 
heated oxygen sensor (rear) and harness connector D-135 
at PCM for damage.

Q: Is the harness connector in good condition?

YES : Check harness connector E-112 at intermediate 

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

P.00E-2

If intermediate connector E-112 is 

in good condition, repair harness wire between right 
bank heated oxygen sensor (rear) connector C-14 
(terminal No. 4) and PCM connector D-135 (terminal 
No. 117) because of open circuit or harness damage. 
Then go to Step 15.

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

Connector Inspection 

P.00E-2

. Then go to Step 15. 

AK201276

1

2

3

4

CONNECTOR: C-14

C-14(GR)

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

 

 

 

 

 

 

 

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