Mitsubishi Outlander GS45X. Manual - part 889

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-489

STEP 6. Check the trouble symptoms.
(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 P0443 set?

YES : Replace the ECM. When the ECM is replaced, 

register the ID code. Refer to GROUP 42B, Diagnosis 
− ID Codes Registration Judgment Table <Vehicles 

with KOS> 

P.42B-15

 or GROUP 42C, Diagnosis 

− ID 

Codes Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

. Then go to Step 7.

NO :  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.00-15

.

STEP 7. Test 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 P0443 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-490

DTC P0446: Evaporative Emission Control System Vent Control Circuit

AK700153

1

3

2

4

3 4

2

1

2

8

7

6

5

4

3

11

21

20

19

18

17

16

15

14

13

12

9

22

1

10

2

1

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

C-129

117

2

8

1

2

1

D-113

B-11

10A

WHITE

WHITE

WHITE

WHITE

GREEN

GREEN

GREEN

WHITE

A-33X

4

3

1

2

20

OFF

ON

AD

D-116

MU802779

1

36

FUSIBLE LINK

EVAPORATIVE EMISSION VENTILATION SOLENOID CIRCUIT

EVAPORATIVE EMISSION
VENTILATION SOLENOID

RELAY BOX
(ENGINE COMPARTMENT)

TO ECM

ENGINE
CONTROL
MODULE

MFI
RELAY

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-491

.

CIRCUIT OPERATION

• The evaporative emission ventilation solenoid 

power is supplied from the MFI relay (terminal 
No. 2).

• The ECM controls the evaporative emission ven-

tilation solenoid ground by turning the power tran-
sistor in the ECM ON and OFF.

.

TECHNICAL DESCRIPTION

• To judge if there is open circuit in the evaporative 

emission ventilation solenoid drive circuit, ECM 
measures the surge voltage of the evaporative 
emission ventilation solenoid coil.

• The ECM drives the evaporative emission venti-

lation solenoid. After the solenoid is turned off, 
the ECM will check if the solenoid coil produces a 
surge voltage (battery positive voltage + 2 volts).

.

DESCRIPTIONS OF MONITOR METHODS

Off-surge does not occur after solenoid is operated 

on to off.

.

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)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

AK700418

AC

Evaporative emission
ventilation solenoid

Spare tire

D-116 (B)

Connector: D-116

AK700402AB

ECM

B-11 (GR)

Connector: B-11

AK700399AB

MFI relay

A-33X

Connector: A-33X

AK900596

Connector: D-113

D-113

AB

AK900595

Connector: C-129

C-129

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-492

DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

• Engine is being cranked.

• Battery positive voltage is between 10 and 16.5 

volts.

Judgement Criteria

• The evaporative emission ventilation solenoid 

coil surge voltage (battery positive voltage + 2 
volts) is not detected for 0.2 second.

• The ECM monitors for this condition once during 

the drive cycle.

Check Conditions

• Battery positive voltage is between 10 and 16.5 

volts.

• ON duty cycle of the evaporative emission purge 

solenoid is 0 percent.

• Evaporative emission ventilation solenoid is ON.

• More than 1 second has elapsed after the above 

mentioned conditions have been met. 

Judgement Criterion

• The evaporative emission ventilation solenoid 

coil surge voltage (battery positive voltage + 2 
volts) is not detected for 1 second after the evap-
orative emission ventilation solenoid is turned 
OFF.

.

OBD-II 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:)

• Evaporative emission ventilation solenoid failed.

• Harness damage

• Connector damage

• ECM failed.

End

No

No

Was surge voltage 

(> VB + 2V) detected?

Good

AK604339

Malfunction

Start

Yes

Yes

Monitoring
conditions