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 

P.00E-2

.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 

P.16-22

.

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