Mitsubishi 380. Manual - part 591

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-456

STEP 1. Check harness connector B-06 at throttle actuator 
control motor for damage.
Q: Is the harness 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 go to Step 8.

STEP 2. Check the throttle actuator control motor.
(1) Disconnect the connector B-06.

(2) Measure the resistance between throttle actuator control 

motor side connector terminal No. 1 and No. 4.

Standard value: 1.5 

± 0.3 ohms [at 20°C (68°F)]

Q: Is the measured resistance between standard value?

YES : Go to Step 3.
NO :  Replace the throttle body assembly. Then go to Step 

8.

03DB180A

CONNECTOR: B-06

B-06 (B)

03DB180A

CONNECTOR: B-06

B-06 (B)

03DB181A

THROTTLE ACTUATOR

CONTROL MOTOR 

CONNECTOR

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-457

STEP 3. Check harness connector B-20 at ENGINE-ECU for 
damage
Q: Is the harness connector in good condition?

YES : Go to Step 4.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 8.

STEP 4. Check the continuity at ENGINE-ECU harness side 
connector B-21.
(1) Disconnect the connector B-21 and measure at the harness 

side.

(2) Measure the continuity between terminals No. 4 and ground 

,No. 6 and ground.

• Should be less than 2 ohms.

Q: Does continuity exist? 

YES : Go to Step 5.
NO :  Repair harness wire between ENGINE-ECU 

connector B-21 (terminals No. 04, No. 06) and ground 
because of open circuit or harness damage. Then go 
to Step 8.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

03DB163A

B-21 HARNESS 

CONNECTOR 

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-458

STEP 5. Check for open circuit and harness damage 
between throttle actuator control motor connector B-06 
(terminal No. 4) and ENGINE-ECU connector B-20 (terminal 
No. 50).
Q: Is the harness wire in good condition?

YES : Go to Step 6.
NO :  Repair it. Then go to Step 8.

03DB180A

CONNECTOR: B-06

B-06 (B)

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

MULTIPORT FUEL INJECTION (MPI) DIAG

MULTIPORT FUEL INJECTION (MPI)

13A-459

STEP 6. Check for open circuit and harness damage 
between throttle actuator control motor connector B-06 
(terminal No. 1) and ENGINE-ECU connector B-20 (terminal 
No. 49).
Q: Is the harness wire in good condition?

YES : Go to Step 7.
NO :  Repair it. Then go to Step 8.

03DB180A

CONNECTOR: B-06

B-06 (B)

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER