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
.
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
,
,
− 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
.
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
.
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
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.
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-
• Refer to configuration diagrams GROUP-
• Refer to circuit diagrams GROUP-
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
.
NO : Go to Step 2.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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