Mitsubishi Montero Sport (2004+). Manual — part 352
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-821
INSPECTION PROCEDURE 30: Ignition Switch-ST System and Transmission Range Switch System.
AK302272
Ignition Switch-ST and Tramsmission Range Switch Circuit
BL
ACK
-BL
UE
BL
ACK
WHITE
BL
ACK
-
YELL
OW
BL
ACK
-
BL
UE
BL
ACK
-BL
UE
BL
ACK
-
BL
UE
BL
ACK
-
YELL
OW
BL
ACK
-
YELL
OW
FUSIBLE LINK (9 )
IG2 IG1
ST
LOCK
ACC
N
3
1
2
4
A-50X
D
3
2
L
P
4
8
7
6
1
5
9 10
2 3
B-01
MU802645
4
R
IGNITION SWITCH
1
2
3
R
9
8
5
10
9
POWERTRAIN
CONTROL
MODULE (PCM)
58
21
STARTER RELAY
3
TRANSMISSION
RANGE SWITCH
1 2 3
4 5 6
D-15
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15 16 17 18 19 20 21 22
C-41
MU801461
1 2 3
4 5
6 7 8
10 11 12
9
C-30
47
41
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58
59
60 61 62 63
64 65 66
C-90
(MU803781)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-822
.
COMMENT
• If the selector lever is moved to "P" or "N" range
and the ignition switch is turned to "START" posi-
tion, battery positive voltage is supplied to PCM
(terminal No. 58) through the starter relay.
Because of this, the PCM detects that the engine
is cranking.
.
TROUBLESHOOTING HINTS (The most likely
caused for this code to be set are: )
• Malfunction of the ignition switch.
• Malfunction of the transmission range switch.
• Improper connector contact, open circuit or
short-circuit in the harness wire.
• Malfunction of the starter relay
• Malfunction of the PCM.
AK200047
CONNECTOR: A-50X
AB
A-50X
STARTER RELAY
AK103912AE
CONNECTOR: C-30, C-41
C-30
C-41
AK200040AB
CONNECTOR: D-15
D-15(B)
AK200048
AC
TRANSMISSION
RANGE SWITCH
CONNECTOR: B-01
B-01(B)
AK103738AC
CONNECTOR: C-90
PCM
C-90(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-823
DIAGNOSIS
STEP 1. Check connector A-50X at starter relay for
damage.
Q: Is the connector in good condition?
YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
.Then confirm that the
malfunction symptom is eliminated.
STEP 2. Check the starter relay.
Refer to GROUP 16, Starting System
− On-vehicle Service −
Starter relay check
Q: Are there any abnormalities?
YES : Go to Step 3.
NO : Repair or replace it. Then confirm that the malfunction
symptom is eliminated.
STEP 3. Measure the power supply voltage at starter relay
connector A-50X.
(1) Disconnect the connector A-50X 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 4.
NO : Repair harness wire between fusible link (9) and
starter relay connector A-50X (terminal No. 4)
because of open circuit. Then confirm that the
malfunction symptom is eliminated.
AK303397
1
4
3
2
AB
CONNECTOR: A-50X
A-50X
HARNESS CONNECTOR:
COMPONENT SIDE
AK303397
1
4
3
2
AB
CONNECTOR: A-50X
A-50X
HARNESS CONNECTOR:
COMPONENT SIDE
AK303398
2
4
1
3
A-50X HARNESS
CONNECTOR:
COMPONENT SIDE
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-824
STEP 4. Check for continuity at starter relay harness side
connector A-50X.
(1) Disconnect the connector A-50X and measure at the
harness side.
(2) Check for the continuity between terminal No. 1 and
ground.
• Should be less than 2 ohms.
Q: Does continuity exist?
YES : Go to Step 5.
NO : Repair harness wire between starter relay connector
A-50X (terminal No. 1) and ground. Then confirm that
the malfunction symptom is eliminated.
STEP 5. Measure the power supply voltage at starter relay
connector A-50X.
(1) Disconnect the connector A-50X and measure at the
harness side.
(2) Turn the ignition switch to the "START" position.
(3) Measure the voltage between terminal No. 3 and ground.
• Voltage should be battery positive voltage. (Selector
lever P or N range)
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 10.
NO : Go to Step 6.
AK303397
1
4
3
2
AB
CONNECTOR: A-50X
A-50X
HARNESS CONNECTOR:
COMPONENT SIDE
AK303399
2
4
1
3
A-50X HARNESS
CONNECTOR:
COMPONENT SIDE
AB
AK303397
1
4
3
2
AB
CONNECTOR: A-50X
A-50X
HARNESS CONNECTOR:
COMPONENT SIDE
AK303400
4
1
3
2
A-50X HARNESS
CONNECTOR:
COMPONENT SIDE
AB
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