Mitsubishi Grandis. Manual — part 784

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MPI)

13A-387

(3) Remove the rear scuff plate (Refer to GROUP

52A, Trim Removal and Installation

P.52A-10

),

and turn up the floor mat.

(4) Remove the rear floor fuel gauge maintenance

hole cover (LH).

(5) Disconnect the fuel tank pump and gauge

assembly connector.

(6) When the fuel pump drive connector (Fuel

tank pump and gauge assembly side) is
attached directly to the battery, check if the
sound of the fuel pump operation can be
heard. If no operating sound is heard, replace
the fuel tank pump (Refer to GROUP 13B,
Fuel Pump Module Disassembly and
Assembly

P.13B-8

).

NOTE: As the fuel pump is an in-tank type, the
fuel pump sound is hard to hear. Then check
the sound from the tank inlet.

(7) Connect fuel tank pump and gauge assembly

connector.

(8) Install the rear floor fuel gauge maintenance

hole cover (LH).

(9) Return the floor mat and install the rear scuff

plate. (Refer to GROUP 52A, Trim Removal
and Installation

P.52A-10

).

(10)Install the rail cover outer, the rail cover inner

and the second seat assembly. (Refer to
GROUP 52A, Second Seat Assembly
Removal and Installation

P.52A-26

).

4. Install the fuel tank cap.

COMPONENT LOCATION

M1131002101078

AC301330

AD

Rear floor fuel gauge maintenance
hole cover

AC301293AC

Fuel tank pump and gauge assembly
connector

AC301523

1

2

3

4

5

Fuel tank pump and gauge assembly
connector

AC

Name

Symbol

Name

Symbol

Accelerator pedal position sensor

U

Engine-ECU <M/T> or engine-A/T-ECU
<A/T> (with barometric pressure sensor)

X

A/C relay

K

Engine control relay

K

A/C switch

T

Engine coolant temperature sensor

G

Air flow sensor
(with intake air temperature sensor)

I

Engine warning lamp
(check engine lamp)

S

Camshaft position sensor

G

Fuel pump relay (1) and (2)

V

Crank angle sensor

L

Ignition coil

O

Cylinder 1,4 oxygen sensor (front)

M

Inhibitor switch <A/T>

R

Cylinder 1,4 oxygen sensor (rear)

N

Injector

D

Cylinder 2,3 oxygen sensor (front)

Q

Oil control valve

G

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MPI)

13A-388

ENGINE CONTROL RELAY CONTINUITY
CHECK

M1131050000497

Cylinder 2,3 oxygen sensor (rear)

P

Power steering fluid pressure sensor
(L. H. drive vehicle)

J

Detonation sensor

C

Power steering fluid pressure sensor
(R. H. drive vehicle)

A

Diagnosis connector

W

Purge control solenoid valve

B

EGR valve

E

Throttle valve control servo relay

K

Electronic-controled throttle valve
(Throttle position sensor and throttle
valve control servo)

F

Vehicle speed sensor <M/T>

H

Name

Symbol

Name

Symbol

AK305638

E

D

A

B

C

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

X

U

V

W

S

T

AB

AK300689

1

2

3

4

AC

Relay box’s
triangle mark

Equipment side
connector

Engine control
relay

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MPI)

13A-389

FUEL PUMP RELAY CONTINUITY CHECK

M1131033000494

THROTTLE VALVE CONTROL SERVO
RELAY CONTINUITY CHECK

M1131053500048

INTAKE AIR TEMPERATURE SENSOR
CHECK

M1131002800740

1. Disconnect the air flow sensor connector.
2. Measure resistance between terminals No. 1 and

No. 4.

Standard value:

13

− 17 kΩ (at −20°C)

5.3

− 6.7 kΩ (at 0°C)

2.3

− 3.0 kΩ (at 20°C)

1.0

− 1.5 kΩ (at 40°C)

0.56

− 0.76 kΩ (at 60°C)

0.30

− 0.45 kΩ (at 80°C)

3. Remove the air flow sensor

Tester
Connectio
n Terminal

Battery Voltage

Normal
State

2

− 3

No Voltage

Continuity

1

− 4

No Voltage

No continuity

Voltage (Connect
positive (+) terminal of
battery to terminal No. 3
and negative (

−)

terminal of battery to
terminal No. 2.)

Continuity

Tester
Connectio
n Terminal

Battery Voltage

Normal
State

2 - 3

No Voltage

Continuity

1 - 4

No Voltage

No continuity

Voltage (Connect
positive (+) terminal of
battery to terminal No. 3
and negative (

−)

terminal of battery to
terminal No. 2.)

Continuity

1

2

3

4

AK305639

Fuel pump relay 1

Fuel pump relay 2

Junction block’s
triangle mark

Equipment
side connector

Fuel pump relay 2

<R.H.drive vehicle>

<L.H.drive vehicle>

Fuel pump relay 1

AB

Tester
Connectio
n Terminal

Battery Voltage

Normal
State

2

− 3

No Voltage

Continuity

1

− 4

No Voltage

No continuity

Voltage (Connect
positive (+) terminal of
battery to terminal No. 3
and negative (

−)

terminal of battery to
terminal No. 2.)

Continuity

AK300691

1

2

3

4

AC

Relay box’s
triangle mark

Equipment side
connector

Throttle valve
control servo relay

AK300692

1

2

3 4

AC

Equipment side connector

Intake air
temperature
sensor

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MPI)

13A-390

4. Measure resistance while heating the sensor

using a hair drier.

Normal condition:

5. If the value deviates from the standard value or

the resistance remains unchanged, replace the air
flow sensor assembly.

6. Install the air flow sensor and tighten it to the

specified torque.

Tightening torque: 1.8

± 0.6 N⋅m

ENGINE COOLANT TEMPERATURE
SENSOR CHECK

M1131003100700

CAUTION

Be careful not to touch the connector (resin
section) with the tool when removing and
installing.

1. Remove the engine coolant temperature sensor.

2. With temperature sensing portion of engine

coolant temperature sensor immersed in hot
water, check resistance.

Standard value:

14

− 17 kΩ (at −20°C)

5.1

− 6.5 kΩ (at 0°C)

2.1

− 2.7 kΩ (at 20°C)

0.9

− 1.3 kΩ (at 40°C)

0.48

− 0.68 kΩ (at 60°C)

0.26

− 0.36 kΩ (at 80°C)

3. If the resistance deviates from the standard value

greatly, replace the sensor.

4. Apply sealant to threaded portion.

Specified sealant:

3M NUT Locking Part No. 4171 or equivalent

5. Install the engine coolant temperature sensor and

tighten it to the specified torque.

Tightening torque: 29

± 10 N⋅m

Temperature (

°C)

Resistance (k

Ω)

Higher

Smaller

AK203040

Intake air

temperature

sensor

AD

AK300693

1 2

AC

Equipment side connector

Engine coolant
temperature
sensor

AKX01622

AKX01623AD