Mitsubishi Eclipse. Manual — part 495
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-523
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• Engine is running.
Judgment Criteria
• Injector coil surge voltage (battery positive volt-
age + 2 volts) has not been detected for 2 sec-
onds.
.
OBD-ll DRIVE CYCLE PATTERN
Refer to , Diagnostic Function
− OBD-ll Drive Cycle −
Procedure 6
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Injector failed.
• Open or shorted injector circuit harness damage,
or connector damage.
• ECM failed. <M/T>
• PCM failed. <A/T>
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
• MB991348: Test Harness
START
END
NO
NO
NO
YES
YES
YES
MALFUNCTION
GOOD
MONITORING
CONDITIONS
CONTINUOUS
FAILURE FOR 2secs
INJ. SURGE V < V
B
+ 2.0 V
AK204052
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-524
STEP 1. Using scan tool MB991958, check actuator test
item 02, 04, 06: Injectors.
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 actuator testing mode for
item 02, 04, 06 Injectors.
(4) Warm up the engine to normal operating temperature: 80
°C
to 96
°C (176°F to 205°F).
• Does the idle state worsen when the injector is cut off.
(Does idling become unstable or does the engine stall)
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the actuator operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
NO : Go to Step 2.
STEP 2. Check the connector at injector for damage.
a. Check the connector B-02 when checking No. 2 cylinder.
b. Check the connector B-06 when checking No. 4 cylinder.
c. Check the connector B-25 when checking No. 6 cylinder.
Q: Is the connector in good condition?
YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 10.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
AK300753
1
2
CONNECTORS: B-02, B-06, B-25
AB
B-02 (GR)
B-06 (GR) B-25 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-525
STEP 3. Check the injector.
(1) Disconnect the injector connector B-02 <No. 2 cylinder> or
B-06 <No. 4 cylinder> or B-25 <No. 6 cylinder>.
(2) Measure the resistance between injector side connector
terminal No. 1 and No. 2.
Standard value: 13
− 16 ohms [at 20°C (68°F)]
Q: Is the resistance between 13 and 16 ohms?
YES : Go to Step 4.
NO : Replace the injector. Then go to Step 10.
STEP 4. Check the power supply voltage at injector
connector.
(1) Disconnect connector B-02 <No. 2 cylinder> or B-06 <No.
4 cylinder> or B-25 <No. 6 cylinder> and measure at the
harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground.
• Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 6.
NO : Go to Step 5.
AK300753
1
2
CONNECTORS: B-02, B-06, B-25
AB
B-02 (GR)
B-06 (GR) B-25 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK000241
INJECTOR SIDE
CONNECTOR
1 2
AB
AK300753
1
2
CONNECTORS: B-02, B-06, B-25
AB
B-02 (GR)
B-06 (GR) B-25 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK000323
HARNESS SIDE
CONNECTOR
2 1
AK000323AC
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-526
STEP 5. Check connector A-18X at MFI relay for damage.
Q: Is the connector in good condition?
YES : Repair harness wire between MFI relay connector
and injector connector because of open circuit or
short circuit to ground.
a. Repair harness wire between MFI relay
connector A-18X (terminal No. 4) and injector
connector B-02 (terminal No. 1) when
checking No. 2 cylinder.
b. Repair harness wire between MFI relay
connector A-18X (terminal No. 4) and injector
connector B-06 (terminal No. 1) when
checking No. 4 cylinder.
c. Repair harness wire between MFI relay
connector A-18X (terminal No. 4) and injector
connector B-25 (terminal No. 1) when
checking No. 6 cylinder.
Then go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 10.
STEP 6. Check for harness damage between MFI relay
connector and injector connector.
a. Check the harness wire between MFI relay connector
A-18X (terminal No. 4) and injector connector B-02 (termi-
nal No. 1) when checking No. 2 cylinder.
b. Check the harness wire between MFI relay connector
A-18X (terminal No. 4) and injector connector B-06 (termi-
nal No. 1) when checking No. 4 cylinder.
c. Check the harness wire between MFI relay connector
A-18X (terminal No. 4) and injector connector B-25 (termi-
nal No. 1) when checking No. 6 cylinder.
Q: Is the harness wire in good condition?
YES : Go to Step 7.
NO : Repair it. Then go to Step 10.
AK300454
2
1
3
4
CONNECTOR: A-18X
AB
A-18X
HARNESS CONNECTOR:
COMPONENT SIDE
AK300454
2
1
3
4
CONNECTOR: A-18X
AB
A-18X
HARNESS CONNECTOR:
COMPONENT SIDE
AK300753
1
2
CONNECTORS: B-02, B-06, B-25
AB
B-02 (GR)
B-06 (GR) B-25 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
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