Mitsubishi Galant (2004+). Manual - part 888

 

  Index      Mitsubishi     Mitsubishi Galant - service repair manual 2004 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  886  887  888  889   ..

 

 

Mitsubishi Galant (2004+). Manual - part 888

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-369

STEP 11. Check harness connector B-21 at PCM for 
damage.

Q: Is the harness connector in good condition?

YES : Go to Step 12.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 15. 

AK303018

55

56

54 53 52 51

57

62 61 60 59 58

63

69 68 67 66 65 64

70

75 74 73 72 71

76

82 81 80 79 78 77

83

CONNECTOR: B-21

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER

B-21 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-370

STEP 12. Check for harness damage between cylinder 2, 3 
heated oxygen sensor (rear) connector B-35 (terminal No. 
2) and PCM connector B-21 (terminal No. 69).

Q: Is the harness wire in good condition?

YES : Go to Step 13.
NO :  Repair it. Then go to Step 15.

AK303835

1

2

3

4

AB

CONNECTOR: B-35 

B-35 (B)

CYLINDER 2, 3
HEATED OXYGEN
SENSOR (REAR)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK303018

55

56

54 53 52 51

57

62 61 60 59 58

63

69 68 67 66 65 64

70

75 74 73 72 71

76

82 81 80 79 78 77

83

CONNECTOR: B-21

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER

B-21 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-371

STEP 13. Check for short circuit to ground and harness 
damage between cylinder 2, 3 heated oxygen sensor (rear) 
connector B-35 (terminal No. 4) and PCM connector B-22 
(terminal No. 96).

Q: Is the harness wire in good condition?

YES : Go to Step 14.
NO :  Repair it. Then go to Step 15.

AK303835

1

2

3

4

AB

CONNECTOR: B-35 

B-35 (B)

CYLINDER 2, 3
HEATED OXYGEN
SENSOR (REAR)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK303016

104

96

94

95

93 92 91

99 98 97

103 102 101 100

108 107 106 105

113 112 111 110 109

CONNECTOR: B-22

B-22 (B)

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-372

STEP 14. Check the cylinder 2, 3 heated oxygen sensor 
(rear).

(1) Disconnect the cylinder 2, 3 heated oxygen sensor (rear) 

connector B-35 and connect test harness special tool 
MD998464 to the connector on the cylinder 2, 3 heated 
oxygen sensor (rear) side.

(2) Warm up the engine until engine coolant temperature 

reaches 80

°C (176°F) or higher.

(3) Perform a racing for 5 minutes or more with the engine 

speed of 4,500 r/min.

(4) Connect a digital voltage meter between terminal No. 2 

(black clip) and terminal No. 4 (white clip).

(5) While repeatedly revving the engine, measure the cylinder 

2, 3 heated oxygen sensor (front) output voltage.

Standard value: 0.6 

 1.0 volt

CAUTION

• Be very careful when connecting the jumper wire; 

incorrect connection can damage the right bank heated 
oxygen sensor (rear).

• Be careful the heater is broken when voltage of beyond 

12 volts is applied to the heated oxygen sensor (rear) 
heater.
NOTE: If the sufficiently high temperature [of approximate 
400

°

C (752

°

F) or more] is not reached although the heated 

oxygen sensor (rear) is normal, the output voltage would be 
possibly low although the rich air/fuel ratio. Therefore, if the 
output voltage is low, use a jumper wire to connect the ter-
minal No. 1 (red clip) and the terminal No. 3 (blue clip) of 
the heated oxygen sensor (rear) with the positive terminal 
and the negative terminal of 12 volts power supply respec-
tively, then check again.

Q: Is the measured voltage between 0.6 and 1.0 volt?

YES : Replace the PCM. Then go to Step 15.
NO :  Replace the cylinder 2, 3 heated oxygen sensor 

(rear). Then go to Step 15.

AK303835

1

2

3

4

AB

CONNECTOR: B-35 

B-35 (B)

CYLINDER 2, 3
HEATED OXYGEN
SENSOR (REAR)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AKX01624

HEATED
OXYGEN
SENSOR
COMPONENT
SIDE
CONNECTOR

MD998464

WHITE

BLACK

AL

 

 

 

 

 

 

 

Content   ..  886  887  888  889   ..