Mitsubishi 380. Manual - part 565

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MFI)

13A-352

STEP 7. Check the knock sensor.
(1) Disconnect the knock sensor connector B-120.
(2) Start the engine and run at idle.

(3) Measure the voltage between knock sensor side connector 

terminal No. 1 (output) and No. 2 (ground).

(4) Gradually increase the engine speed.

• The voltage increases with the increase in the engine 

speed.

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

Q: Is the sensor operating properly?

YES : Replace the ECU. Then go to Step 8.
NO :  Replace the knock sensor. Then go to Step 8.

AK303120

1

2

KNOCK SENSOR

AB

CONNECTOR: B-120

B-120 (GR)

HARNESS

CONNECTOR:

COMPONENT SIDE

AK303857

1 2

AB

KNOCK SENSOR 

CONNECTOR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MFI)

13A-353

STEP 8. Using diagnostic tool , read the diagnostic trouble 
code (DTC).

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) Erase the DTC.
(4) Test drive under the following conditions:

• Engine speed: 3000 − 5000r/min

• Engine load: 40% or more

• Drive a minimum of 3 seconds after the above condi-

tions have been met.

(5) After completing the test drive, check for DTC.Turn the 

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

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

Q: Is DTC P0325 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MFI)

13A-354

DTC P0335: Crankshaft Position Sensor Circuit.

.

CIRCUIT OPERATION

• The crankshaft position sensor power is supplied 

from the ECU(terminal No. 25).

• Terminal No. 1 of the crankshaft position sensor 

is grounded with ECU (terminal No. 8).

• A 5-volt voltage is applied on the crankshaft posi-

tion sensor output terminal (terminal No. 2) from 
the ECU (terminal No. 23). The crankshaft posi-
tion sensor generates a pulse signal when the 
output terminal is opened and grounded.

.

TECHNICAL DESCRIPTION

• The crankshaft position sensor detects the crank 

angle (position) of each cylinder, and converts 
that data to pulse signals, then which are input to 
the ECU.

• When the engine is running, the crankshaft posi-

tion sensor outputs a pulse signal.

• The ECU checks whether pulse signal is input 

while the engine is cranking.

.

DTC SET CONDITIONS <Range/Performance problem - Alignment>

Check Conditions, Judgment Criteria

• '+/- 1 tooth correction several times continuous or 

loosing reference gap during engine running for 
0.5 second.

• Crank angle signal frequently missing.

.

DTC SET CONDITIONS <Range/Performance problem - Circuit continuity>

Check Conditions

• Engine is being cranked.

Judgment Criteria

• no reference gap detection during engine start for 

0.5 second.

• Crank angle signal missing.

.

EOBD DRIVE CYCLE PATTERN

Refer to Diagnostic Function 

− EOBD Drive Cycle − 

P.13A-11

.

.

TROUBLESHOOTING HINTS (The most 
likely causes for this code to be set are:)

• Crankshaft position sensor failed.

AK303122

CRANKSHAFT

POSITION

SENSOR

AB

CRANKSHAFT

SPROCKET

CONNECTOR: B-119

B-119 (B)

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MFI)

13A-355

• Open or shorted crankshaft position sensor cir-

cuit. .

• Harness or connector damage.

• Refer to component locations GROUP-

70

• Refer to configuration diagrams GROUP-

80

• Refer to circuit diagrams GROUP-

90