Mitsubishi Outlander GS45X. Manual — part 972
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-821
STEP 8. Check for short circuit to ground or harness
damage between ECM connector B-10 and starter relay
connector A-27X.
(1) Disconnect the B-10 and A-27X.
(2) Check for the continuity between connector A-27X (terminal
No. 2) and ground.
• Not continuity.
Q: Is the harness wire in good condition?
YES : Go to Step 9.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
STEP 9. Check for open circuit or harness damage
between starter relay connector A-27X and ground.
(1) Disconnect the connector A-27X and ground at the harness
side.
(2) Measure the resistance between connector A-27X (terminal
No. 1) and ground.
• Should be less than 2 ohms.
Q: Is the measured resistance less than 2 ohms?
YES : Then go to Step 10.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
STEP 10. Measure the power supply voltage at starter relay
connector A-27X.
(1) Disconnect the connector A-27X measure at the harness
side.
(2) Measure the voltage between terminal No. 4 and ground.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 11.
NO : Repair harness wire between starter relay connector
A-27X (terminal No. 4) and fusible link (24) because
of open circuit. Then confirm that the malfunction
symptom is eliminated.
AK900613
2
1
3
4
AC
A-27X harness
connector:
component side
AK700518
2
1
3
4
AB
A-27X harness
connector:
component side
2
1
3
4
AK700519AB
A-27X harness
connector:
component side
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-822
STEP 11. Check for open circuit or short circuit to ground
or harness damage between starter relay connector A-27X
and starter motor connector B-114.
(1) Disconnect the connector A-27X and B-114 measure at the
harness side.
(2) Measure the resistance between connector A-27X (terminal
No. 3) and connector B-114 (terminal No. 1).
• Should be less than 2 ohms.
(3) Check for the continuity between connector A-27X (terminal
No. 3) and ground.
• Not continuity.
Q: Is the harness wire in good condition?
YES : Replace the starter motor. Then confirm that the
malfunction symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
1
2
1
3
4
AK700520AB
B-114 harness connector:
component side
A-27X harness
connector:
component side
AK700521
2
1
3
4
AB
A-27X harness
connector:
component side
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-823
INSPECTION PROCEDURE 24: Ignition Circuit System.
AK800940
1
3
2
4
2 3
1
2 3
1
2 3
1
2 3
1
2 3
1
2 3
1
1
2 3
6
7 8
4 5
9 10
1
10 111213 14 1516 17 1819 20
2 3 4
5 6 7 8 9
1
2
3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
AB
IGNITION CIRCUIT
1
2
5
21
4
20
52
4
16
1
A-13
B-21
MU802645
B-10
1
3
3
3
3
3
3
2
1
2
1
2
2
1
1
2
2
3
5
10A
A-33X
4
3
1
2
21
TO ECM
36
FUSIBLE LINK
WHITE
WHITE-
RED
WHITE-
RED
WHITE-
RED
WHITE-
RED
WHITE-
RED
WHITE-
RED
WHITE-BLUE
WHITE-RED
WHITE-GREEN
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BLA
CK-WHITE
WHITE
WHITE
WHITE-BLA
CK
WHITE-
BLA
CK
BLA
CK-
WHITE
BLA
CK-RED
WHITE-RED
WHITE-RED
WHITE
OFF
ON
B-19
(MU802076)
B-18
(MU802076)
B-15
(MU802076)
B-05
(MU802076)
B-01
(MU802076)
B-04
(MU802076)
ENGINE CONTROL MODULE
RELAY BOX
(ENGINE COMPARTMENT)
IGNITION
COIL 2
IGNITION
COIL 4
IGNITION
COIL 6
IGNITION
COIL 1
IGNITION
COIL 3
IGNITION
COIL 5
MFI
RELAY
SPARK
PLUG
SPARK
PLUG
SPARK
PLUG
SPARK
PLUG
BLACK
SPARK
PLUG
SPARK
PLUG
53
WHITE-RED
BLACK
BLACK
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-824
.
CIRCUIT OPERATION
• The battery positive voltage is applied from the
MFI relay (terminal No. 2) to the ignition coil (ter-
minal No.3) and is grounded to the vehicle body
via the ignition coil (terminal No.1).
• A power voltage of 12 V is applied to the ignition
coil (terminal No. 2) from the ECM (terminal No.
4, No. 5, No. 20, No. 21, No. 52 and No. 53).
.
COMMENT
• When the ECM turn the power transistor in the
unit to OFF, the battery positive voltage is applied
to the power transistor in the ignition coil, result-
ing that the power transistor is ON. And, when
the ECM turns the power transistor in the unit to
ON, the power transistor in the ignition coil will be
turned OFF.
• When the power transistor in the ignition coil is
turned to ON with any signal from the ECM, the
primary voltage will be applied through the igni-
tion coil.When the power transistor in the ignition
coil is turned OFF, the primary current is blocked
and high voltage is generated in the secondary
coil.
.
TROUBLESHOOTING HINTS (The most
likely causes for this case:)
• Malfunction of the ignition coil.
• Improper connector contact, open circuit or
short-circuit harness wire.
• Malfunction of the ECM.
AK900602
Connector: A-13
A-13
AB
AK900134
AD
B-21 (B)
Connector: B-21
Intermediate
connector
AK700399AB
MFI relay
A-33X
Connector: A-33X
AK900146 AD
B-19 (B)
B-15 (B)
B-18 (B)
B-01 (B)
B-05 (B)
B-04 (B)
Connectors: B-01, B-04, B-05, B-15, B-18 and
B-19
AK700401AB
ECM
B-10 (GR)
Connector: B-10
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