Mitsubishi Outlander GS45X. Manual — part 620
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-303
.
CIRCUIT OPERATION
• The injector power is supplied from the injector
relay (terminal No. 3).
• The ECM controls the injector by turning the
power transistor in the ECM "ON" and "OFF".
.
TECHNICAL DESCRIPTION
• The amount of fuel injected by the injector is con-
trolled by the amount of continuity time the coil is
grounded by the ECM.
.
DESCRIPTIONS OF MONITOR METHODS
The ECM detects open circuit and short malfunction.
.
MONITOR EXECUTION
Continuous
.
AK704087AB
Connector: A-13
A-13
AK704115
Injector relay
AB
Connector: A-24X
A-24X
AK704088
MFI relay
AB
Connector: A-33X
A-33X
AK704120
Injector No. 2
AB
Connector: B-120
B-120 (GR)
AK704090AB
Connector: B-10
B-10 (GR)
AK704117 AB
ETACS-ECU
Connectors: C-304, C-317
C-317
C-304
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-304
MONITOR EXECUTION CONDITIONS
(Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
DTC SET CONDITIONS <Circuit continuity
− open circuit and shorted low>
Logic Flow Chart
Check Condition
• Engine is running.
Judgement Criterion
• The supply voltage is 3 volts or less without the
injector driving for 2 seconds.
.
Good
Malfunction
Injector voltage <= 3V
End
No
No
No
No
AK604331
Start
Yes
Yes
Continuous
failure for 2secs
Monitoring
conditions
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-305
DTC SET CONDITIONS <Circuit continuity
− shorted high>
Logic Flow Chart
Check Condition
• Engine is running.
Judgement Criterion
• The coil current is 4.5 amperes or more with the
injector driving for 2 seconds.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Pattern 23
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• No. 2 cylinder injector failed.
• Open or shorted No. 2 cylinder injector circuit,
harness damage, or connector damage.
• ECM failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
• MB991658: Test Harness
• MB992110: Power Plant ECU Check Harness
Good
Malfunction
Current >= 4.5A
End
Yes
No
No
No
AK604332
Start
Yes
Yes
Continuous
failure for 2secs
Monitoring
condition
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-306
STEP 1. Using scan tool MB991958, check actuator test
item 1: No. 2 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. 2 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 harness connector B-120 at No. 2 cylinder
injector for damage.
Q: Is the harness 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 20.
STEP 3. Check the No. 2 cylinder injector.
(1) Disconnect the No. 2 cylinder injector connector B-120.
(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 : Go to Step 4.
NO : Replace the No. 2 cylinder injector. Then go to Step
20.
AK700568AB
MB991824
MB991827
MB991910
Data link
connector
AK604038
1 2
AB
Injector side
connector
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