Mitsubishi Outlander GS45X. Manual — part 854
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-349
STEP 1. Using scan tool MB991958, check actuator test
item 1: No. 1 Injector.
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 1, No. 1 injector.
(4) Warm up the engine to normal operating temperature: 80
°C
to 95
°C (176°F to 203°F).
• The idle should become slightly rougher.
(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
− How to
Cope with Intermittent Malfunctions
.
NO : Go to Step 2.
STEP 2. Check for harness connector B- 21 at the
intermediate connector and B-10 at the ECM for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 3.
NO : Repair it. Refer to GROUP 00E, Harness Connector
. Then go to Step 9.
STEP 3. Measure the injector supply voltage at the
intermediate connector harness B-21 and ground.
(1) Disconnect the intermediate connector B-21 and measure
at the female connector side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 6 and ground.
• Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured resistance battery positive voltage?
YES : Go to Step 4.
NO : Check harness connector A-13 at intermediate
connector for damage, and repair or replace as
required. Refer to GROUP 00E, Harness Connector
Inspection
. If intermediate connector is in
good condition, repair harness wire between injector
relay connector A-24X (terminal No. 3) and
intermediate connector B-21 (terminal No. 6) because
of open circuit. Then go to Step 9.
AK700568AB
MB991824
MB991827
MB991910
Data link
connector
3
4
5
8
9
1
2
6
7
10
AK700296AB
B-21 harness
connector:
harness side
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-350
STEP 4. Check the No. 1 cylinder injector resistance at
intermediate connector B-21.
(1) Disconnect the intermediate connector B-21 and measure
at male connector side.
(2) Measure the resistance between terminal No. 6 and No. 7.
• Resistance should be between 10.5 and 13.5 ohms.
Q: Is the measured resistance between 10.5 and 13.5
ohms?
YES : Go to Step 7.
NO : Go to Step 5.
STEP 5. Check the harness connector B-101 at No. 1
cylinder injector for damage.
Remove the intake manifold.
Q: Is the harness connector in good condition?
YES : Go to Step 6.
NO : Repair it. Refer to GROUP 00E, Harness Connector
. Then go to Step 9.
STEP 6. Check the No. 1 cylinder injector B-101.
(1) Disconnect the No. 1 cylinder injector connector B-101.
(2) Measure the resistance between injector side connector
terminal No. 1 and No. 2.
Standard value: 10.5
− 13.5 ohms [at 20°C (68°F)]
Q: Is the measured resistance between 10.5 and 13.5 ohms
[at 20
°C (68°F)]?
YES : Repair harness wire between the intermediate
connector B-21 (terminal No. 6) and the injector
connector B-101 (terminal No. 1) and harness
wire between injector connector B-101 (terminal
No. 2) and intermediate connector B-21 (terminal
No. 7) because of open circuit or short circuit to
ground or harness damage.
Then go to Step 9.
NO : Replace the No. 1 cylinder injector. Then go to Step 9.
5
4
3
2
1
10
9
8
7
6
AK700298AB
B-21
Intermediate
connector
AK700204
1 2
AB
Injector side
connector
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-351
STEP 7. Check for harness between the intermediate
connector B-21and the ECM connector B-10.
(1) Disconnect the intermediate connector B-21 and the ECM
connector B-10.
(2) Measure the resistance between the intermediate
connector B-21 (terminal No. 7) and the ECM connector
B-10 (terminal No. 2).
• Should be less than 2 ohms.
(3) Measure the continuity between the intermediate connector
B-21 (terminal No. 7) and ground.
• Not continuity
Q: Is the harness wire in good condition?
YES : Go to Step 8.
NO : Repair it. Refer to GROUP 00E, Harness Connector
. Then go to Step 9.
STEP 8. Using the oscilloscope, check the No. 1 cylinder
injector.
(1) Disconnect the intermediate connector B-21 and connect
the test harness MB991658 between the separated
connectors.
(2) Connect the oscilloscope probe to injector intermediate
connector terminal to No. 7.
NOTE: When measuring with the ECM side connector, dis-
connect all ECM connectors. Connect the check harness
special tool (MB992110) between the separated connec-
tors. Then connect an oscilloscope probe to the check har-
ness connector terminal No. 2.
(3) Start the engine and run at idle.
(4) Measure the waveform.
• The waveform should show a normal pattern similar to
the illustration.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the waveform normal?
YES : It can be assumed that this malfunction is intermittent.
Refer to 00, How to Use Troubleshooting/Inspection
Service Points
− How to Cope with Intermittent
Malfunctions
.
NO : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, Diagnosis
− ID Codes Registration Judgment Table <Vehicles
or GROUP 42C, Diagnosis
− ID
Codes Registration Judgment Table <Vehicles with
WCM>
AK700299
1
2
3
4
5
6
7
8
9
10
AB
B-21 harness
connector:
component side
5
4
3
2
1
10
9
8
7
6
AK700300AB
B-21 Intermediate
connector
MB991658
Oscilloscope
AK700301
Normal waveform
A: Injector drive time
A
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-352
STEP 9. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Pattern 22
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0201 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
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