Mitsubishi 380. Manual - part 574

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI)

13A-388

STEP 1. Using diagnostic tool, check actuator test item 10:
Evaporative Emission Purge Solenoid.

CAUTION

To prevent damage to diagnostic tool, always turn the igni-
tion switch to the "LOCK" (OFF) position before connect-
ing or disconnecting diagnostic tool .
(1) Connect diagnostic tool to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set diagnostic tool to the actuator test mode for item 10,

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

− How to

Cope with Intermittent Malfunctions

P.00-14

NO : Go to Step 2.

STEP 2 Check the Purge solenoid valve operation. Refer to
Group 17 , Evaporative Emission Purge Solenoid Valve
Check

P.17-82

Q:Is the Purge Solenoid Valve operating correctly?

YES : 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.00-14

NO : Repair or replace it. Then go to Step 3.

STEP3. Test the EOBD drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− EOBD Drive Cycle −

P.13A-11

(2) Check the diagnostic trouble code (DTC).

Q: Is DTC P0441 set?

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

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

03DB193A

F-08

EVAPORATIVE

EMISSION PURGE

SOLENOID

HARNESS

CONNECTOR:

COMPONENT SIDE

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI)

13A-389

DTC P0443: Evaporative Emission Control System Purge Control Valve Circuit.

CIRCUIT OPERATION

• The evaporative emission purge solenoid power

is supplied from the MPI relay (terminal No. 4).

• The ECU controls ground evaporative emission

purge solenoid by turning the power transistor in
the ECU "ON" and "OFF".

TECHNICAL DESCRIPTION

• To judge if there is open circuit in the evaporative

emission purge solenoid drive circuit, the ECU
performs an internal test.

DTC SET CONDITIONS

Check Conditions

• Battery voltage is between 9.04 and 16.01volts.

Engine speed is above 801r/min.

Judgment Criteria

• IC internal test (open circuit, short to earth, short

to battery).

• No MIL.

EOBD DRIVE CYCLE PATTERN

Refer to Diagnostic Function

− EOBD Drive Cycle −

P.13A-11

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 or connector damage.

• Refer to component locations GROUP-

• Refer to configuration diagrams GROUP-

• Refer to circuit diagrams GROUP-

AK303014

CONNECTOR: B-17X

MFI RELAY

FRONT OF VEHICLE

B-17X

03DB193A

F-08

EVAPORATIVE

EMISSION PURGE

SOLENOID

HARNESS

CONNECTOR:

COMPONENT SIDE

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI)

13A-390

DIAGNOSIS

Required Special Tools:

• Diagnostic tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

• MB992044: Engine ECU Check Harness

STEP 1. Using diagnostic tool, check actuator test item 10:
Evaporative Emission Purge Solenoid.

CAUTION

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

− How to

Cope with Intermittent Malfunctions

P.00-14

NO : Go to Step 2.

STEP 2 Check harness connector F-08 at the evaporative
emission purge solenoid for damage.

Q:Is the harness 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.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

03DB193A

F-08

EVAPORATIVE

EMISSION PURGE

SOLENOID

HARNESS

CONNECTOR:

COMPONENT SIDE

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI)

13A-391

STEP 3 Check the evaporative emission purge solenoid.

(1)Disconnect the evaporative emission purge solenoid

connector F-08.

(2)Measure the resistance between evaporative emission

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

Standard value: 16

± 2 ohms [at 20°C]

Q: Is the measured resistance between 14 and 18 ohms [at

°C]?

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 F-08.

(1)Disconnect the connector F-08 and measure at the harness

side.

(2)Turn the ignition switch to the "ON" position.

(3)Measure the voltage between terminal No. 2 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.

03DB193A

F-08

EVAPORATIVE

EMISSION PURGE

SOLENOID

HARNESS

CONNECTOR:

COMPONENT SIDE

1 2

AK202961

EVAPORATIVE EMISSION

PURGE SOLENOID

CONNECTOR

03DB193A

F-08

EVAPORATIVE

EMISSION PURGE

SOLENOID

HARNESS

CONNECTOR:

COMPONENT SIDE

AK303144

B-05 HARNESS

CONNECTOR:

COMPONENT SIDE

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