Mitsubishi Eclipse. Manual - part 360

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-933

CAUTION

• To prevent damage to scan tool MB991958, always turn 

the ignition switch to the "LOCK" (OFF) position before 
connecting or disconnecting scan tool MB991958.

• To prevent not to confuse top and bottom of fuel pump 

relay harness side connector, ensure the triangular 
mark on the junction block and check the connector.

1. Check the operating of the fuel pump by using scan tool 

MB991958 to force-drive the fuel pump.

2. If the fuel pump will not operate, check by using the 

following procedure. If normal, check the fuel pump drive 
circuit.

(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Remove the instrument panel side cover (driver’s side).

(3) Remove the fuel pump relay (2), and apply battery 

voltage to junction block side connector terminal number 
4. Check that an operating sound can be heard from the 
fuel pump.
NOTE: As the fuel pump is an in-tank type, the fuel pump 
sound is hard to hear. Remove the fuel tank filler tube cap 
and check from the tank inlet.

(4) Check for fuel pressure by pinching the fuel hose with 

fingertips.

(5) Install the fuel pump relay (2) and instrument panel side 

cover (driver’s side).

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

2
1

4

3

AC200989

FUEL
PUMP
RELAY (2)

INSTRUMENT 
PANEL 
(DRIVER'S SIDE)

FUEL PUMP RELAY (2)
HARNESS SIDE
CONNECTOR

JUNCTION
BLOCK
TRIANGLE
MARK

AB

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-934

MULTIPORT FUEL INJECTION (MFI) RELAY 
CONTINUITY CHECK

M1131050000293

FUEL PUMP RELAY CONTINUITY CHECK

M1131033000290

BATTERY 
VOLTAGE

TERMINAL NO. TO 
BE CONNECTED 
TO BATTERY

TERMINAL NO. TO 
BE CONDUCTED

Not supplied

−

2 

− 3

Supplied

2 

−  3

1 

− 4

1

2

3

4

1

2

3

4

AK301804

MFI RELAY
SIDE
CONNECTOR

MFI RELAY SIDE
CONNECTOR

AB

BATTERY 
VOLTAGE

TERMINAL NO. TO 
BE CONNECTED 
TO BATTERY

TERMINAL NO. TO 
BE CONDUCTED

Not supplied

−

1 

− 4

Supplied

1 

−  4

2 

− 3

AK100884

1 2
3

2

3 4

1

4

FUEL PUMP
RELAY SIDE
CONNECTOR

FUEL PUMP
RELAY SIDE
CONNECTOR

AB

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-935

INTAKE AIR TEMPERATURE SENSOR CHECK

M1131002800472

1. Disconnect the volume airflow sensor connectors.
2. Measure resistance between terminals No. 5 and No. 6.

Standard value:

13 

− 17 kΩ [at −20°C (−4°F)]

5.3 

− 6.7 kΩ [at 0°C (32°F)]

2.3 

− 3.0 kΩ [at 20°C (68°F)]

1.0 

− 1.5 kΩ [at 40°C (104°F)]

0.56 

− 0.76 kΩ [at 60°C (140°F)]

0.30 

− 0.42 kΩ [at 80°C (176°F)]

3. If not within specifications, replace the volume airflow 

sensor.

4. Measure resistance while heating the sensor using a hair 

dryer.

Normal condition:

5. If resistance does not decrease as heat increases, replace 

the volume airflow sensor assembly.

ENGINE COOLANT TEMPERATURE SENSOR 
CHECK

M1131003100454

CAUTION

Be careful not to touch the connector (resin section) with 
the tool when removing and installing.
1. Drain engine coolant, then remove the engine coolant 

temperature sensor.

2. With the temperature sensing portion of engine coolant 

temperature sensor immersed in hot water, check the 
resistance.

Standard value:

14 

− 17 kΩ [at −20°C (−4°F)]

5.1 

− 6.5 kΩ [at 0°C (32°F)]

2.1 

− 2.7 kΩ [at 20°C (68°F)]

0.9 

− 1.3 kΩ [at 40°C (104°F)]

0.48 

− 0.68 kΩ [at 60°C (140°F)]

0.26 

− 0.36 kΩ [at 80°C (176°F)]

3. If resistance deviates from the standard value greatly, 

replace the sensor.

AKX01407AB

INTAKE AIR TEMPERATURE
SENSOR SIDE CONNECTOR

1 2 3 4 5 6 7

TEMPERATURE

RESISTANCE (kiloohm)

Higher

Smaller

AKX01621 AB

INTAKE AIR
TEMPERATURE
SENSOR

AKX01622

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-936

4. Apply 3M

 AAD part number 8731 or equivalent to threaded 

portion.

5. Install the engine coolant temperature sensor and tighten it 

to the specified torque.

Tightening torque: 29 

± 10 N⋅m (22 ± 7 ft-lb)

THROTTLE POSITION SENSOR CHECK

M1131003200503

Required Special Tool:

• MB991348: Test Harness Set

.

Checking the Terminal Resistance
1. Disconnect the throttle position sensor connector.
2. Measure resistance between the throttle position sensor 

side connector terminal No. 1 and terminal No. 4.

Standard value: 3.5 

− 6.5 kΩ

3. Measure resistance between the throttle position sensor 

side connector terminal No. 1 and terminal No. 3.

Normal condition:

4. If resistance is outside the standard value, or if it doesn't 

change smoothly, replace the throttle position sensor.
NOTE: After replacement, the throttle position sensor should 
be adjusted. (Refer to 

P.13A-927

.)

.

AKX01623 AB

Throttle valve slowly open 
until fully open from the idle 
position

Changes smoothly in 
proportion to the opening 
angle of the throttle valve

AKX01413

THROTTLE POSITION
SENSOR SIDE CONNECTOR

1 2 3 4

AB