Mitsubishi 380. Manual - part 566

 

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Mitsubishi 380. Manual - part 566

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MFI)

13A-356

DIAGNOSIS

Required Special Tools:

• Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

• MD998478: Test Harness (3pin, triangle)
• MB992044: Power Plant ECU Check Harness

STEP 1. Using diagnostic tool , check data list item 02: 
Crankshaft Position Sensor.

CAUTION

To prevent damage to diagnostic tool , always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting diagnostic tool .
(1) Connect diagnostic tool to the data link connector.
(2) Start the engine and run at idle.
(3) Set diagnostic tool to the data reading mode for item 02, 

Crankshaft Position Sensor.

• The tachometer and engine speed indicated on the 

diagnostic tool should match.

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

Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunctions 

P.00-14

.

NO :  Go to Step 2.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MFI)

13A-357

STEP 2. Using the oscilloscope, check the crankshaft 
position sensor.
(1) Disconnect the crankshaft position sensor connector B-119, 

and connect the test harness special tool (MD998478) 
between the separated connectors.

(2) Connect the oscilloscope probe to crankshaft position 

sensor connector terminal No. 2 (black clip of special tool).

NOTE: When measuring with the ECU side connector, dis-
connect the all ECU connectors and connect check harness 
special tool (MB992044) between the separated connec-
tors. then connector the oscilloscope probe to the check 
harness connector terminal No. 23.

(3) Start the engine and run at idle.

(4) Check the waveform.

• The waveform should show a pattern similar to the illus-

tration.

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

Q: Is the waveform normal?

YES : Go to Step 3.
NO :  Go to Step 5.

AK303123

1

2

3

CRANKSHAFT

POSITION

SENSOR

AB

CRANKSHAFT

SPROCKET

CONNECTOR: B-119

B-119 (B)

HARNESS

CONNECTOR:

COMPONENT SIDE

AK102979AB

MD998478

1 2

3

CRANKSHAFT POSITION

SENSOR CONNECTOR

OSCILLOSCOPE

AK302211

5V

NORMAL WAVEFORM

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MFI)

13A-358

STEP 3. Check harness connector B-119 at the crankshaft 
position sensor 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 18.

STEP 4. Using diagnostic tool , check data list item 02: 
Crankshaft Position Sensor.

CAUTION

To prevent damage to diagnostic tool , always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting diagnostic tool .
(1) Connect diagnostic tool to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set diagnostic tool to the data reading mode for item 02, 

Crankshaft Position Sensor.

• The tachometer and engine speed indicated on the 

diagnostic tool should match.

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

Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunctions 

P.00-14

.

NO :  Then go to Step 5.

AK303123

1

2

3

CRANKSHAFT

POSITION

SENSOR

AB

CRANKSHAFT

SPROCKET

CONNECTOR: B-119

B-119 (B)

HARNESS

CONNECTOR:

COMPONENT SIDE

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MFI)

13A-359

STEP 5. Check harness connector B-119 at the crankshaft 
position sensor for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 6.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 18.

AK303123

1

2

3

CRANKSHAFT

POSITION

SENSOR

AB

CRANKSHAFT

SPROCKET

CONNECTOR: B-119

B-119 (B)

HARNESS

CONNECTOR:

COMPONENT SIDE

 

 

 

 

 

 

 

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