Mitsubishi 380. Manual - part 580

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-412

STEP 15. Measure the ground circuit for resistance at the 
vehicle speed sensor connector B-121.
(1) Disconnect connector B-121 from the speed sensor and 

measure at the harness side.

(2) Measure the resistance between terminal 2 and ground.

• The resistance should measure less than 2 ohms.

Q: Is the measured resistance less than 2 ohms?

YES : Go to Step 17.
NO :  Go to Step 16.

STEP 16. Check intermediate connector A-13 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is the connector and terminals in good condition?

YES : Go to Step 17.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

CONNECTOR:  B-121

    

VEHICLE

SPEED SENSOR
        B-121

03DB234A

03DB237A

B-121 HARNESS

CONNECTOR:

10DB083A

A-13 (GR)

CONNECTOR: A-13

1

4

7

8

2 3

5

13 14

17

15

12

16

11

10

9

6

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-413

STEP 17. Measure the resistance at the ENGINE-ECU 
connector B-21 by using check harness special tool 
MB992044.
(1) Disconnect all the connectors from the ENGINE-ECU.
(2) Connect special tool MB992044 (check harness) between 

the ENGINE-ECU and the body and control-side harness 
connector.

(3) Turn the ignition switch to the "ON" position.

(4) Measure the resistance between terminal 82 and ground.

• The resistance should measure less than 2 ohms.

(5) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the measured resistance less than 2 ohms?

YES : Go to Step 18.
NO :  Repair or replace wiring harness.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

03DB238A

MB992044 CHECK HARNESS

CONNECTOR:   B-21

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-414

STEP 18. Check ENGINE-ECU connector B-21 and vehicle 
speed sensor connector B-121 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 19.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

CONNECTOR:  B-121

    

VEHICLE

SPEED SENSOR
        B-121

03DB234A

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-415

STEP 19. Check the harness for open circuit or damage 
between ENGINE-ECU connector B-21 terminal 82 and 
vehicle speed sensor connector B-121 terminal 2.
Q: Is the harness wire in good condition?

YES : Go to Step 20.
NO :  Repair or replace the harness wire.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

CONNECTOR:  B-121

    

VEHICLE

SPEED SENSOR
        B-121

03DB234A