Mitsubishi Eclipse. Manual — part 608
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-975
STEP 3. Using scan tool MB991958, check data list.
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) Check the following items in the data list. Refer to, Data List
Reference Table
a. Item 14: Throttle Position Sensor.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : Refer to, Clean the throttle valve area
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
INSPECTION PROCEDURE 18: Poor acceleration.
.
COMMENT
• Defective ignition system, abnormal air/fuel ratio,
poor compression pressure, etc. are suspected.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case: )
• Malfunction of the ignition system.
• Malfunction of air/fuel ratio control system.
• Malfunction of the fuel supply system.
• Poor compression pressure.
• Clogged exhaust system.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-976
STEP 1. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
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) 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.
STEP 2. Using scan tool MB991958, check actuator test
items 01, 02, 03, 04, 05, 06: Injector.
(1) Turn the ignition switch to the "ON" position.
(2) Check following items in the actuator test. Refer to, Actuator
a. Item 01, 02, 03, 04, 05, 06: Injector.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the actuator operating properly?
YES : Go to Step 3.
NO : Refer to, DTC P0201, P0203, P0205
− Injector Circuit
, DTC P0202, P0204, P0206
− Injector
Circuit
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-977
STEP 3. Check the ignition timing.
Refer to GROUP 11C, On-vehicle Service
− Ignition Timing
Check
.
Q: Is the ignition timing normal?
YES : Go to Step 4.
NO : Check that the crankshaft position sensor and timing
belt cover are in the correct position. Then confirm
that the malfunction symptom is eliminated.
STEP 4. Using scan tool MB991958, check data list.
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) Check the following items in the data list. Refer to, Data List
Reference Table
a. Item 13: Intake Air Temperature Sensor.
b. Item 25: Barometric Pressure Sensor.
c. Item 21: Engine Coolant Temperature Sensor.
d. Item 14: Throttle Position Sensor.
e. Item 69: Right Bank Heated Oxygen Sensor (rear).
f. Item 39: Right Bank Heated Oxygen Sensor (front).
g. Item 59: Left Bank Heated Oxygen Sensor (rear).
h. Item 11: Left Bank Heated Oxygen Sensor (front).
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are they operating properly?
YES : Go to Step 5.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-978
STEP 5. Using scan tool MB991958, 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: EGR Vacuum Regulator Solenoid Valve.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are they operating properly?
YES : Go to Step 6.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
STEP 6. Using scan tool MB991958, check data list.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items of data list. Refer to, Data List
Reference Table
a. Item 39: Right Bank Heated Oxygen Sensor (front).
b. Item 11: Left Bank Heated Oxygen Sensor (front).
• Voltage should fluctuate between 0 − 0.4 volt and 0.6 −
1.0 volt while idling after the engine has been warmed.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : Go to Step 8.
NO : Go to Step 7.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
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