Mitsubishi Montero Sport (2004+). Manual — part 278

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-525

DTC SET CONDITIONS

Logic Flow Chart

.

Check Conditions

• Battery positive voltage is at between 10 and

16.5 volts.

Judgment Criteria

• The evaporative emission purge solenoid coil

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

• The PCM monitors for this condition once during

the drive cycle.

Check Conditions

• Battery positive voltage is at between 10 and

16.5 volts.

• ON duty cycle of the evaporative emission purge

solenoid is between 10 and 90 percent.

• Evaporative emission ventilation solenoid is OFF.

• More than 1 second has elapsed after the above

mentioned conditions have been met.

Judgment Criteria

• The evaporative emission purge solenoid coil

surge voltage (battery positive voltage + 2 volts)
is not detected for 1 second. When the evapora-
tive emission purge solenoid is turned OFF.

.

OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function

− OBD-II Drive Cycle −

Procedure 6

− Other Monitor

P.13A-4

.

.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

• Evaporative emission purge solenoid failed.

• Open or shorted evaporative emission purge

solenoid circuit, harness damage or connector
damage.

• PCM failed.

MONITORING

CONDITIONS

NO

NO

YES

YES

GOOD

MALFUNCTION

WAS SURGE VOLTAGE

(> V

B

+2V) DETECTED?

START

END

AK301449

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-526

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I

• MB991827: USB Cable

• MB991911: Main Harness B

STEP 1. Using scan tool MB991958, check actuator test
item 08: Evaporative Emission Purge Solenoid.

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 actuator test mode for item

08, Evaporative emission purge solenoid.

• An operation sound should be heard and vibration

should be felt when the evaporative emission purge
solenoid is operated.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

P.00-7

.

NO : Go to Step 2.

STEP 2. Check connector A-10 at the evaporative emission
purge solenoid for damage.
Q: Is the connector in good condition?

YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

AK303629AB

MB991911

MB991827

MB991824

16-PIN

AK200027

2 1

AB

CONNECTOR: A-10

A-10(B)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-527

STEP 3. Check the evaporative emission purge solenoid.
(1) Disconnect the evaporative emission purge solenoid

connector A-10.

(2) Measure the resistance between evaporative emission

purge solenoid side connector terminal No. 1 and No. 2.

Standard value: 30

− 34 ohms [at 20°C (68°F)]

Q: Is the measured resistance between 30 and 34 ohms [at

20

°C (68°F)]?

YES : Go to Step 4.
NO : Replace the evaporative emission purge solenoid.

Then go to Step 12.

STEP 4. Measure the power supply voltage at evaporative
emission purge solenoid harness side connector A-10.
(1) Disconnect the connector A-10 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 battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 6.
NO : Go to Step 5.

AK200027

2 1

AB

CONNECTOR: A-10

A-10(B)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX00342

AK200027

2 1

AB

CONNECTOR: A-10

A-10(B)

HARNESS CONNECTOR:
COMPONENT SIDE

1

2

AK000573

A-10 HARNESS
CONNECTOR:
COMPONENT SIDE

AH

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-528

STEP 5. Check connector C-59 at MFI relay for damage.
Q: Is the connector in good condition?

YES : Check connector C-14 at intermediate connector for

damage, and repair or replace as required. Refer to
GROUP 00E, Harness Connector Inspection

P.00E-2

. If intermediate connector is in good

condition, repair harness wire between MFI relay
connector C-59 (terminal No. 1) and evaporative
emission purge solenoid connector A-10 (terminal No.
1) because of open circuit or short circuit to ground.
Then go to Step 12.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

STEP 6. Measure the power supply voltage at PCM
connector C-89 by backprobing.
(1) Do not disconnect the connector C-89.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 34 and ground

by backprobing.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 9.
NO : Go to Step 7.

AK200023

2 1

3

4

CONNECTOR: C-59

AB

C-59

HARNESS
CONNECTOR:
COMPONENT
SIDE

AK103914

2

3

4

5

6

7

8

9

11

12

13

14

15

16

17

18

19

20

30

21

22

23

24

25

26

27

28

29

31

32

33

34

35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01547

1

2

3 4

5 6

7 8

10 11 12 13 14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

C-89 HARNESS
CONNECTOR:
HARNESS SIDE

AG

9