Mitsubishi Galant 9G. Manual - part 685

 

  Index      Mitsubishi     Mitsubishi Galant 9G - service repair manual

 

Search            

 

 

 

 

 

 

 

  

 

Content   ..  683  684  685  686   ..

 

 

Mitsubishi Galant 9G. Manual - part 685

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-182

STEP 2. Measure the sensor output voltage at engine 
coolant temperature sensor connector B-104 by 
backprobing.
(1) Do not disconnect the connector B-104.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 1 and ground by 

backprobing.

• When engine coolant temperature is −20°C (−4°F), volt-

age should be between 3.9 and 4.5 volts.

• When engine coolant temperature is 0°C (32°F), voltage 

should be between 3.2 and 3.8 volts.

• When engine coolant temperature is 20°C (68°F), volt-

age should be between 2.3 and 2.9 volts.

• When engine coolant temperature is 40°C (104°F), volt-

age should be between 1.3 and 1.9 volts.

• When engine coolant temperature is 60°C (140°F), volt-

age should be between 0.7 and 1.3 volts.

• When engine coolant temperature is 80°C (176°F), volt-

age should be between 0.3 and 0.9 volt.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?

YES : Go to Step 3.
NO :  Go to Step 5.

STEP 3. Check harness connector B-104 at the engine 
coolant temperature sensor for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 4.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

AK303815

1

2

AB

CONNECTOR: B-104

B-104 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK201572

2

1

AD

B-104 HARNESS 
CONNECTOR: 
HARNESS SIDE

AK303815

1

2

AB

CONNECTOR: B-104

B-104 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-183

STEP 4. Using scan tool MB991958, check data list item 21: 
Engine Coolant Temperature Sensor.

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) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item 

21, Engine Coolant Temperature Sensor.

• The engine coolant temperature and temperature 

shown with the scan tool should approximately match.

(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 

− How to 

Cope with Intermittent Malfunctions 

P.00-14

.

NO :  Replace the PCM. Then go to Step 14.

STEP 5. Check harness connector B-104 at engine coolant 
temperature sensor for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 6.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827

AK303815

1

2

AB

CONNECTOR: B-104

B-104 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-184

STEP 6. Measure the sensor supply voltage at engine 
coolant temperature sensor harness side connector B-104.
(1) Disconnect the connector B-104 and measure at the 

harness side.

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

(3) Measure the voltage between terminal No. 1 and ground.

• Voltage should be between 4.5 and 4.9 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?

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

STEP 7. Check harness connector B-22 at PCM for 
damage.
Q: Is the harness connector in good condition?

YES : Replace the PCM. Then go to Step 14.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

AK303815

1

2

AB

CONNECTOR: B-104

B-104 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK000234 AR

2 1

B-104 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-185

STEP 8. Check the continuity at engine coolant 
temperature sensor harness side connector B-104.
(1) Disconnect the connector B-104 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 11.
NO :  Go to Step 9.

STEP 9. Check harness connector B-21 at PCM for 
damage.
Q: Is the harness 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 go to Step 14.

AK303815

1

2

AB

CONNECTOR: B-104

B-104 (B)

HARNESS 
CONNECTOR:
COMPONENT SIDE

AK000235

B-104 HARNESS
CONNECTOR: 
COMPONENT SIDE

1

2

AQ

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)

 

 

 

 

 

 

 

Content   ..  683  684  685  686   ..