Mitsubishi Outlander GS45X. Manual — part 898

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-525

STEP 8. Perform the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Pattern 22

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0452 set?

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

DTC P0453: Evaporative Emission Control System Pressure Sensor High Input

AK901211

AB

I

A

C

E

D

F

G

H

Air filter

B

System diagram

Intake manifold

Evaporative emission
purge solenoid

Fuel tank

Evaporative
emission canister

Fuel tank differential
pressure sensor

Vent pipe

Evaporative emission
ventilation solenoid

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-526

71 72 73 74 75 76 77 78 79 80 81 82

83 84 85 86 87 88 89 90 91 92 93 94

95 96 97 98 99

100 101 102 103 104

112 113 114

109

108

107

110 111

115 116

106

105

118

117

2

8

7

6

5

4

3

11

21

20

19

18

17

16

15

14

13

12

9

22

1

10

3

2

1

AK704184

3

2

1

4

2

3

114

113

112

5 V

AB

D-19

(MU802723)

C-129

B-11

ENGINE
CONTROL
MODULE

FUEL TANK DIFFERENTIAL PRESSURE SENSOR CIRCUIT

FUEL TANK DIFFERENTIAL
PRESSURE SENSOR

YELLO

W

-BLA

CK

YELLO

W

-BLA

CK

BR

O

W

N

B

R

O

WN

RED-GREEN

RED-GREEN

AK704190

ECM

B-11 (GR)

Connector: B-11

AB

AK900595

Connector: C-129

C-129

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-527

.

CIRCUIT OPERATION

• The ECM (terminal No. 114) supplies a 5-volt ref-

erence voltage to the fuel tank differential pres-
sure sensor (terminal No. 3). The ECM (terminal
No. 113) supplies a ground to the fuel tank differ-
ential pressure sensor (terminal No. 2).

• The ECM (terminal No. 112) receives a voltage

signal proportional to the pressure in the fuel tank
from the fuel tank differential pressure sensor
(terminal No. 1).

.

TECHNICAL DESCRIPTION

• To determine whether the fuel tank differential

pressure sensor is defective, the ECM monitors
the fuel tank differential pressure sensor output
voltage.

• The ECM judges if the fuel tank differential pres-

sure sensor output voltage is normal.

NOTE: In rare cases, this DTC may be also set
under some fuel and driving conditions regardless of
the fuel pressure sensor output voltage when the fuel
system is clogged.

.

DESCRIPTIONS OF MONITOR METHODS

• Compare purge solenoid status with fuel tank dif-

ferential pressure sensor output voltage.

.

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)

• Evaporative emission purge solenoid monitor

• Evaporative emission ventilation solenoid monitor

• Fuel temperature sensor monitor

• Fuel level sensor monitor

Sensor (The sensors below are determined to be

normal)

• Mass airflow sensor

• Barometric pressure sensor

• Intake air temperature sensor

• Engine coolant temperature sensor

• Accelerator pedal position sensor

.

AK704189

Fuel tank differential
pressure sensor

D-19

Connector: D-19

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-528

DTC SET CONDITIONS

Logic Flow Chart

.

Check Conditions

• 2 seconds or more have passed since the start-

ing sequence was completed.

• Remaining fuel level is 80 percent or less when

the engine is started.

Judgement Criteria

• The fuel tank differential pressure sensor output

voltage remains 4.8 volts or greater for 5 sec-
onds.

.

OBD-ll DRIVE CYCLE PATTERN

Refer to Diagnostic Function

− OBD-II Drive Cycle −

Pattern 22

P.13B-11

.

.

TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CODE TO BE
SET ARE:)

• Connector damage.

• Harness damage.

• Fuel tank differential pressure sensor failed.

• ECM failed.

.

OVERVIEW OF TROUBLESHOOTING

• DTC P0453 can be set by a faulty fuel tank differ-

ential pressure sensor or related circuit, or ECM
failure.

AK704187

No

End

No

No

Malfunction

Good

No

Start

Monitoring
conditions

Output voltage

< 0.2v

Output voltage

> 4.8v

Yes

Yes

Yes

Yes

Continuous

failure for 5 secs