Mitsubishi 380. Manual - part 619

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-568

STEP 5. Using diagnostic tool , check actuator test items 
01, 02, 03, 04, 05, 06: Injector.

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) Check following items in the actuator test. Refer to Actuator 

Test Reference Table 

P.13A-644

.

a. Item 01, 02, 03, 04, 05, 06: Injector.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Are they operating properly?

YES : Go to Step 6.
NO :  Refer to DTC P0201

P.13A-272

, P0202

P.13A-280

, 

P0203

P.13A-287

, DTC P0204

P.13A-295

, 

P0205

P.13A-302

, P0206

P.13A-310

 

− Injector Circuit .

STEP 6. Using diagnostic tool , check data list.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the data list. Refer to Data List 

Reference Table 

P.13A-637

.

a. Item 5: Intake Air Temperature Sensor.
b. Item 6: Engine Coolant Temperature Sensor.

c. Item AD: Right Bank Heated Oxygen Sensor (rear).

d. Item AC: Right Bank Heated Oxygen Sensor (front).
e. Item AF: Left Bank Heated Oxygen Sensor (rear).

f. Item AE: Left Bank Heated Oxygen Sensor (front).

g. Item 83: Power Steering Pressure Switch.

(3) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Are they operating properly?

YES : Go to Step 7.
NO :  Repair or replace it. Then confirm that the malfunction 

symptom is eliminated.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-569

STEP 7. Using diagnostic tool, check actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the actuator test. Refer to 

Actuator Test Reference Table 

P.13A-644

.

a. Item 10: Evaporative Emission Purge Solenoid.

(3) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the actuator operating properly?

YES : Go to Step 8.
NO :  Repair or replace it. Then confirm that the malfunction 

symptom is eliminated.

STEP 8. Check the fuel pressure.
Refer to On-vehicle Service 

− Fuel Pressure Test 

P.13A-661

.

Q: Is the fuel pressure normal?

YES :  a. Check the following items, and repair or replace 

the defective items.

• Vacuum leak.

• Broken intake manifold gasket.

• Broken air intake hose.

• Broken vacuum hose.

• Positive crankcase ventilation valve does not 

operate.

b. Injector clogged.

Then confirm that the malfunction symptom is 
eliminated.

NO :  Repair or replace it. Then confirm that the malfunction 

symptom is eliminated.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-570

STEP 9. Check Data list item No. 16, advance ignition 
timing.
Ignition timing is controlled by the ENGINE-ECUand will vary 
depending on engine requirement.

Q: Is the advance ignition timing normal?

YES : Check the following items, and repair or replace the 

defective items.

a. Check the ignition coil and spark plugs.
b. Check the purge control system.

c. Check compression pressure.

d. Check if the foreign materials (water, 

kerosene, etc.) got into fuel.

Then confirm that the malfunction symptom is 

eliminated.

NO :  Check that the crankshaft position sensor and timing 

belt cover are in the correct position. Then confirm 
that the malfunction symptom is eliminated.

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MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI) <3.8L ENGINE>

13A-571

13A

INSPECTION PROCEDURE 9: Idle speed is high (improper idle speed).

.

COMMENT

• In such cases as the above, the cause is proba-

bly that the intake air volume during idle is too 
great.

.

TROUBLESHOOTING HINTS (The most 
likely causes for this case:)

• Malfunction of the electronic control throttle valve 

system.

• Malfunction of the throttle body.

• Refer to component locations GROUP-

70

• Refer to configuration diagrams GROUP-

80

• Refer to circuit diagrams GROUP-

90

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Using diagnostic tool, read the diagnostic trouble 
code (DTC).

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) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC set?

YES : Refer to Diagnostic Trouble Code Chart 

P.13A-17

.

NO :  Go to Step 2.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

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