Mitsubishi Lancer Evolution X. Manual — part 435
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-805
STEP 20. Check harness connector B-109 at starter
connector for damage.
Q: Is the connector in good condition?
YES : Go to Step 21.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
STEP 21. Measure the power supply voltage at starter
harness side connector B-109.
(1) Disconnect the connector B-109 and measure at the
harness side.
(2) Turn the ignition switch to the "START" 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 26.
NO : Go to Step 22.
STEP 22. Measure the power supply voltage at starter relay
harness side connector A-28X.
(1) Disconnect the connector A-28X and 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 23.
NO : Repair harness wire between fusible link (24) and
starter relay connector A-28X (terminal No. 4)
because of open circuit or short circuit to ground.
Then confirm that the malfunction symptom is
eliminated.
STEP 23. Check for open circuit and short circuit to
ground between starter relay connector A-28X (terminal
No. 3) and starter connector B-109 (terminal No. 1)
NOTE: Check harness after checking intermediate connector
A-39, B-17. If intermediate connector is damaged, repair or
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion
. Then check that the malfunction is eliminated.
Q: Is the harness wire in good condition?
YES : Go to Step 24.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
AK704593
1
B-109 harness
connector:
component side
AB
2
1
3
4
AK700519AC
A-28X harness
connector:
component side
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-806
STEP 24. Check harness connector B-10 at ECM connector
and harness connector C-27 at shift lever connector for
damage.
Q: Is the connector in good condition?
YES : Go to Step 25.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
STEP 25. Check for harness damage between ECM
connector B-10 (terminal No. 106) and shift lever
connector C-27 (terminal No. 7).
Q: Is the harness wire in good condition?
YES : Check harness connector C-50 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 shift
lever connector C-27 (terminal No. 5, No. 15) and
starter relay connector A-28X (terminal No. 2)
because of harness damage. Then confirm that the
malfunction symptom is eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
STEP 26. Check for harness damage between starter relay
connector A-28X (terminal No. 3) and starter connector
B-109 (terminal No. 1)
NOTE: Check harness after checking intermediate connector
A-39, B-17. If intermediate connector is damaged, repair or
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion
. Then check that the malfunction is eliminated.
Q: Is the harness wire in good condition?
YES : Go to Step 27.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-807
STEP 27. Check for harness damage between fusible link
(24) and starter relay connector A-28X (terminal No. 4)
Q: Is the harness wire in good condition?
YES : Go to Step 28.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
STEP 28. Check harness connector B-108 at starter
connector for damage.
Q: Is the connector in good condition?
YES : Go to Step 29.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
STEP 29. Check for open circuit and short circuit to
ground and harness damage between battery and starter
connector B-108 (terminal No. 1)
Q: Is the harness wire in good condition?
YES : Replace the starter.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-808
Inspection procedure 26: Ignition circuit system
AK900756
1
3
2
4
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
1 2 3
4 5 6
3 4
2
1
3 4
2
1
3 4
2
1
3 4
2
1
1
AB
IGNITION CIRCUIT
IGNITION
COIL 1
IGNITION
COIL 2
IGNITION
COIL 3
IGNITION
COIL 4
ENGINE CONTROL MODULE
3
2
3
2
3
2
3
2
4
5
20
21
4
A-39
MU802607
B-09
SPARK
PLUG
CAPACITOR
SPARK
PLUG
SPARK
PLUG
SPARK
PLUG
4
10A
A-34X
4
3
1
2
21
TO ECM
36
FUSIBLE LINK
WHITE
YELLO
W
-WHITE
GRA
Y
GRA
Y
GRA
Y
GRA
Y
WHITE-RED
WHITE-RED
WHITE-GREEN
WHITE
OFF
ON
B-02
(MU802066)
B-03
(MU802066)
B-21
(MU801211)
B-04
(MU802066)
B-06
(MU802066)
MFI
RELAY
RELAY BOX
(ENGINE COMPARTMENT)
BLA
CK
BLA
CK
BLA
CK
BLA
CK
BR
O
WN-
WHITE
BR
O
WN-
YELLO
W
BLA
CK
BLA
CK
BLACK
BLACK
BLACK
4
1
4
4
COIL
DRIVER
COIL
DRIVER
COIL
DRIVER
COIL
DRIVER
5 V
5 V
5 V
5 V
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