Mitsubishi Montero Sport (2004+). Manual - part 201

 

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Mitsubishi Montero Sport (2004+). Manual - part 201

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-217

STEP 11. Check for harness damage between right bank 
heated oxygen sensor (front) connector A-07 (terminal No. 
4) and PCM connector C-91 (terminal No. 72).
Q: Is the harness wire in good condition?

YES : Go to Step 12.
NO :  Repair it. Then go to Step 13.

AK200490

1

2

3

4

A-07(B)

AB

CONNECTOR: A-07

HARNESS 
CONNECTOR: 
COMPONENT SIDE

RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)

AK104028

98

78

71

88

89

76

77

72
79
91

73
80

74

75

81
92

82

83

93

84

85

94

86

87

95

96

90

97

AB

CONNECTOR: C-91

C-91(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-218

STEP 12. Check for harness damage between right bank 
injector connector and PCM connector.

a. Check the harness wire between right bank injector connec-

tor A-75 (terminal No. 2) and PCM connector C-89 (terminal 
No. 1) when checking No. 1 cylinder.

b. Check the harness wire between right bank injector connec-

tor A-74 (terminal No. 2) and PCM connector C-89 (terminal 
No. 24) when checking No. 3 cylinder.

c. Check the harness wire between right bank injector connec-

tor A-73 (terminal No. 2) and PCM connector C-89 (terminal 
No. 10) when checking No. 5 cylinder.

Q: Is the harness wire in good condition?

YES : Go to Step 13.
NO :  Repair it. Then go to Step 14.

STEP 13. Check the fuel pressure.
Refer to On-vehicle Service 

− Fuel Pressure Test 

P.13A-884

.

Q: Is the fuel pressure normal?

YES : Replace the PCM. Then go to Step 14.
NO :  Repair it. Then go to Step 14.

STEP 14. Test the OBD-II drive cycle.
(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 P0134 set?

YES : Repeat the troubleshooting.
NO :  The procedure is complete.

AK200015

1

2

AB

CONNECTORS: A-73, A-74, A-75

A-73(GR)

A-74(GR)

A-75(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

AK103914

2

3

4

5

6

7

8

9

11

12

13

14

15

16

17

18

19

20

30

21

22

23

24

25

26

27

28

29

31

32

33

34

35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-219

DTC P0135: Heated Oxygen Sensor Heater Circuit (bank 1 sensor 1)

Right Bank Heatesd Oxygen Sensor (front) Heater Circuit

AK200183

RED

RED

WHITE-

BLA

CK

RED

WHITE-

BLA

CK

WHITE-

BLA

CK

POWERTRAIN CONTROL MODULE (PCM)

1

2

22

33

1

2

4

3

4

12

26

MFI
RELAY

RIGHT BANK HEATED OXYGEN
SENSOR (FRONT)

FUSIBLE LINK (12)

TO PCM TO PCM

C-59

YELLO

W

-BLUE

3

4

1

10

2 3 4 5 6 7 8 9

11

12 13 14 15 16 17 18 19 20 21 22

23 24 25 26 27 28 29 30 31 32 33

C-14

1 2
3 4

A-07
MU802605

10

2

3 4

5 6

7 8

9

11 12 13 14 15 16 17 18 19 20

30

21 22 23

24

25

26 27 28 29

31 32 33

34 35

1

C-89
(MU803784)

JOINT
CONNECTOR (5)

1

2

3

4

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-220

.

CIRCUIT OPERATION

• Power is supplied from the MFI relay (terminal 

No. 1) to the right bank heated oxygen sensor 
(front) heater.

• The PCM (terminal No. 4) controls continuity to 

the right bank heated oxygen sensor (front) 
heater by turning the power transistor in the PCM 
"ON" and "OFF".

.

TECHNICAL DESCRIPTION

• The PCM checks whether the heater current is 

within a specified range when the heater is ener-
gized.

.

DESCRIPTIONS OF MONITOR METHODS
Right bank heated oxygen sensor heater (front) cur-

rent is out of specified range when engine coolant 
temperature is over 20

°C (68°F).

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (Other 
monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Engine coolant temperature sensor

.

AK200489

A-07(B)

RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)

AB

CONNECTOR: A-07

AK201000

MFI RELAY

CONNECTOR: C-59

AB

C-59

AK103911AB

CONNECTOR: C-14

C-14

AK103738AD

CONNECTOR: C-89

PCM

C-89(GR)

 

 

 

 

 

 

 

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