Mitsubishi 380. Manual — part 478

GENERAL DESCRIPTION

MULTIPOINT FUEL INJECTION (MPI)

13A-4

MULTIPOINT FUEL INJECTION (MPI) SYSTEM DIAGRAM

NOTE: For the vacuum routing, refer to GROUP 17, Emission Control System

− Vacuum Hoses − Vacuum

Hose Routing

P.17-77

.

MANIFOLD

ABSOLUTE

PRESSURE

SENSOR

THROTTLE

ACTUATOR

CONTROL

MOTOR

CAMSHAFT

POSITION

SENSOR

LEFT BANK HEATED OXYGEN

SENSOR (FRONT)

FUEL TANK

3 THROTTLE POSITION SENSOR

(MAIN/SUB)

MASS AIRFLOW

SENSOR

ENGINE

COOLANT

TEMPERATURE

SENSOR

GHT BANK

ATED

YGEN

NSOR

RONT)

RIGHT BANK HEATED

OXYGEN SENSOR (REAR)

FUEL PRESSURE

REGULATOR

LEFT BANK HEATED OXYGEN

SENSOR (REAR)

FUEL PUMP

CRANKSHAFT POSITION

SENSOR

FUEL

LEVEL

SENSOR

AIR

INLET

INTAKE AIR TEMPERATURE

SENSOR

EVAPORATIVE

EMISSION

PURGE SOLENOID

INJECTOR

1 MASS AIRFLOW SENSOR

2 INTAKE AIR TEMPERATURE SENSOR

3 THROTTLE POSITION SENSOR (MAIN/SUB)

4 MANIFOLD ABSOLUTE PRESSURE SENSOR

5 ENGINE COOLANT TEMPERATURE SENSOR

6 CAMSHAFT POSITION SENSOR

7 CRANKSHAFT POSITION SENSOR

8 RIGHT BANK HEATED OXYGEN SENSOR (FRONT)

9 RIGHT BANK HEATED OXYGEN SENSOR (REAR)

10 LEFT BANK HEATED OXYGEN SENSOR (FRONT)

11 LEFT BANK HEATED OXYGEN SENSOR (REAR)

12 FUEL LEVEL SENSOR

ACCELERATOR PEDAL POSITION SENSOR

(MAIN/SUB)

KNOCK SENSOR

POWER STEERING PRESSURE SWITCH

OUTPUT SHAFT SPEED SENSOR

TRANSMISSION RANGE SWITCH

IGNITION SWITCH-IG

IGNITION SWITCH-ST

POWER SUPPLY

1 THROTTLE ACTUATOR

CONTROL MOTOR

2 INJECTOR

3 EVAPORATIVE EMISSION

PURGE SOLENOID

IGNITION COIL, IGNITION

POWER TRANSISTER

MULTIPOINT FUEL

INJECTION (MPI) RELAY

FUEL PUMP RELAY

THROTTLE ACTUATOR

CONTROL MOTOR RELAY

ALTERNATOR G TERMINAL

HEATED OXYGEN SENSOR

HEATER

FAN CONTROL MODULE

(RADIATOR, A/C CONDENSER)

A/C COMPRESSOR CLUTCH

RELAY

DIAGNOSTIC OUTPUT

ENGINE-ECU

ENSE

DECIDE

ACT

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-5

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

TROUBLESHOOTING STRATEGY

M1131150001204

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure to have
exhausted most of the possible ways to find an MPI
fault.
1. Gather as much information as possible about the

complaint from the customer.

2. Verify that the condition described by the

customer exists.

3. Check the vehicle for any MPI Diagnostic Trouble

Code (DTC).

4. If you cannot verify the condition and there are no

DTCs, the malfunction is intermittent. For
information on how to cope with intermittent
malfunctions, refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How

to Cope with Intermittent Malfunctions

P.00-14

.

5. If you can verify the condition but there are no

DTCs, or the system cannot communicate with
the diagnostic tool, refer to the trouble symptom
classification table.

6. If there is a DTC, record the number of the code,

then erase the code from the memory using the
diagnostic tool.

7. Reconfirm the malfunction symptom and carry out

a test drive with the appropriate drive cycle
pattern.

8. If DTC is set again, carry out an inspection with

appropriate diagnostic trouble code procedures.
Refer to Diagnostic Trouble Code Chart

P.13A-17

9. If DTC is not set again, the malfunction is

intermittent. For information on how to cope with
intermittent malfunctions, refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points

− How to Cope with Intermittent

Malfunctions

P.00-14

.

10.After repairs are completed, conduct a road test

duplicating the complaint set conditions to confirm
the malfunction has been corrected.

NOTE: If the ENGINE-ECU is replaced, Immobilizer
Encrypted Code Registration should be carried out,
Refer to GROUP 54A, Ignition Switch

− On-vehicle

Service

− Immobilizer Encrypted Code Registration

P.54A-37

.

DIAGNOSTIC FUNCTION

M1131155500881

.

CHECK ENGINE WARNING LAMP

Among the on-board diagnostic items, Check Engine Warning
Lamp illuminates to notify the driver of an emission control or
major engine operating systemmalfunction.
However, when an irregular signal returns to normal and the
Engine-ECU judges that it has returned to normal, the Check
Engine Warning Lamp is switched off.
Immediately after the ignition switch is turned on, the Check
Engine Warning Lamp) is lit for 20 seconds to indicate that the
Check Engine Warning Lamp) operates normally.

MALFUNCTION INDICATOR

LAMP (SERVICE ENGINE SOON

or Check Engine Lamp)

03DB216A

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-6

HOW TO CONNECT THE DIAGNOSTIC TOOL
(MUT-III)

Required Special Tools:

• : Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: V.C.I

• MB991827: USB Cable

• MB991910: Main Harness A

CAUTION

To prevent damage to diagnostic tool , always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting diagnostic tool .
1. Ensure that the ignition switch is at the "LOCK" (OFF)

position.

2. Start up the personal computer.

3. Connect special tool MB991827 to special tool MB991824

and the personal computer.

4. Connect special tool MB991910 to special tool MB991824.

5. Connect special tool MB991910 to the data link connector.

6. Turn the power switch of special tool MB991824 to the "ON"

position.

NOTE: When the special tool MB991824 is energised, spe-
cial tool MB991824 indicator lamp will be illuminated in a
green color.

7. Start the MUT-III system on the personal computer.

8. Select "System select."

9. Ensure Model & Class details are correctly entered. Refer to

MUTT III Operaters Manual if in doubt.

NOTE: Disconnecting the diagnostic tool is the reverse of
the connecting sequence, making sure that the ignition
switch is at the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC
TROUBLE CODES.

Required Special Tools:

• : Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

CAUTION

To prevent damage to diagnostic tool , always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting diagnostic tool .

NOTE: If the battery voltage is low, diagnostic trouble codes will
not be set. Check the battery if diagnostic tool does not dis-
play.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-7

1. Connect diagnostic tool to the data link connector.

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

3. Select "System select."

4. Ensure Model & Class details are correctly entered. Refer to

MUTT III Operaters Manual if in doubt.

5. Choose "MPI" from the System List.

6. Select "Self Diagnosis" tab.

7. If a DTC is set, it is shown.

8. Choose "Erase DTCs" to erase the DTC.

HOW TO READ DATA LIST

Required Special Tools:

• : Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

CAUTION

To prevent damage to diagnostic tool , always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting diagnostic tool .
1. Connect diagnostic tool to the data link connector.

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

3. Select "System select."

4. Choose "MPI" from the System List.

5. Select "Data List."

6. Choose an appropriate item and select the "OK" button(tick).

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827