Mitsubishi Eclipse. Manual — part 613
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-995
STEP 14. Using scan tool MB991958, check data list item
59: Left Bank Heated oxygen sensor (rear).
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) Start the engine and run at idle.
(3) Set scan tool MB991958 to the data reading mode for item
59, Left Bank Heated Oxygen Sensor (rear).
• Average voltage should be 0.6 volt or less, when idling.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : Go to Step 16.
NO : Replace the left bank heated oxygen sensor (front).
Then confirm that the malfunction symptom is
eliminated.
STEP 15. Check the fuel pressure.
Refer to, Fuel Pressure Test
Q: Is the fuel pressure normal?
YES : Go to Step 16.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
STEP 16. Check the following items.
(1) Check the following items, and repair or replace the
defective items.
a. Check the injectors for fuel leakage.
b. Check the ignition coil, spark plugs, spark plug cables.
c. Check compression pressure.
d. Check the positive crankcase ventilation system.
e. Check the evaporative emission system.
(2) Then check the malfunction symptom.
Q: Is the malfunction symptom is eliminated?
YES : The check is completed.
NO : Replace the catalytic converter. 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-996
INSPECTION PROCEDURE 24: Purge Flow Test of the Evaporative Emission Canister Failure.
.
COMMENT
• The test fails when the purge line or purge port is
clogged or if the evaporative emission purge
solenoid fails.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case: )
• Purge line or purge port is clogged.
• Malfunction of the evaporative emission purge
solenoid.
• Evaporative emission canister is clogged.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
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 : Refer to GROUP 17, Emission Control System
−
Purge Control System Check (Purge Flow Check)
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-997
INSPECTION PROCEDURE 25: Pressure Test of the Evaporative System Failure.
.
COMMENT
• The test fails if there is a leak from the fuel tank or
vapor line.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case: )
• Loose fuel tank filler tube cap.
• Broken seal in fuel tank, vapor line evaporative
emission canister.
DIAGNOSIS
STEP 1. Check the evaporative emission purge solenoid.
Refer to GROUP 17, Emission Control System
− Evaporative
Emission Purge Solenoid Check
.
Q: Is the evaporative emission purge solenoid normal?
YES : Go to Step 2.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
STEP 2. Check the evaporative emission ventilation
solenoid.
Refer to GROUP 17, Emission Control System
− Evaporative
Emission Ventilation Solenoid Check
Q: Is the evaporative emission ventilation solenoid
normal?
YES : Check the following items, and repair or replace the
defective items.
a. Check for leaks from the vapor line or
evaporative emission canister.
b. Check for leaks from the fuel tank.
Then confirm that the malfunction symptom is
eliminated.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-998
INSPECTION PROCEDURE 26: Generator output voltage is low (approximately 12.3 volts)
AK000713
4
3
2
6
3 4
7 8
1 2
5
1
BL
ACK
-RED
BL
ACK
-RED
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
GENERATOR
VOLTAGE
REGULATOR
1
2
B-13
MU802749
8
C-51 <M/T>, C-52 <A/T>
(MU803784)
2
3 4
5 6
7 8
9
11 12 13 14 15 16 17 18 19 20
30
21 22 23
24 25
26 27 28 29
3132 33
34 35
1
10
B-45
(MU802046)
Generator Circuit
AK300097
CONNECTOR: B-13
AB
B-13 (B)
AK300099
CONNECTOR: B-45
AB
B-45 (GR)
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