Mitsubishi Eclipse. Manual - part 235

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-433

DTC SET CONDITIONS <Rationality-alignment>

Logic Flow Chart

.

Check Conditions

• Engine speed is higher than 50 r/min.

Judgment Criteria

• Camshaft position sensor output voltage has not 

changed (no pulse signal is input) for 2 seconds.

.

START

END

YES

NO

NO

YES

MALFUNCTION

GOOD

CONTINUOUS

FAILURE FOR 2secs

EXPECTED STATE

OF THE SENSOR

MONITORING 
CONDITIONS?

YES

NO

AK301447

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-434

DTC SET CONDITIONS <Circuit countinuity>

Logic Flow Chart

.

Check Conditions

• Engine speed is higher than 50 r/min.

Judgment Criteria

• Normal signal pattern has not been input for cyl-

inder identification from the crankshaft position 
sensor signal and camshaft position sensor sig-
nal for 2 seconds.

.

OBD-ll DRIVE CYCLE PATTERN
Refer to Diagnostic Function 

− OBD-ll Drive Cycle − 

Procedure 6 

− Other Monitor 

P.13A-5

.

.

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

• Camshaft position sensor failed.

• Camshaft position sensing cylinder.

• Open or shorted camshaft position sensor circuit, 

or harness damage or connector damage.

• ECM failed. <M/T>

• PCM failed. <A/T>

DIAGNOSIS

Required Special Tool:

• MB991709: Test Harness Set

START

END

NO

NO

YES

YES

MALFUNCTION

GOOD

OUTPUT SIGNAL

CHANGES

CONTINUOUS

FAILURE FOR 2secs

MONITORING

CONDITIONS?

YES

NO

AK301448

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-435

STEP 1. Using the oscilloscope, check the camshaft 
position sensor.
(1) Disconnect the camshaft position sensor connector B-09, 

and connect test harness special tool (MB991709) in 
between. (All terminals should be connected.)

(2) Connect the oscilloscope probe to the camshaft position 

sensor side connector terminal No. 2.
NOTE: When measuring with the ECM or PCM side con-
nector, connect an oscilloscope probe to terminal No. 88 
<M/T> or terminal No. 56 <A/T>.

(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 2.
NO :  Go to Step 4.

STEP 2. Check connector B-09 at camshaft position 
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 3.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 19.

STEP 3. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Procedure 6 − 

Other Monitor 

P.13A-5

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0340 set?

YES : Replace the ECM or PCM. Then go to Step 19.
NO :  It can be assumed that this malfunction is intermittent. 

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

P.00-6

.

AK102976AB

1 2 3

CAMSHAFT POSITION
SENSOR CONNECTOR

OSCILLOSCOPE

MB991709

AK103570 AB

2 ENGINE REVOLUTIONS

NORMAL WAVEFORM

5V

AK300411

1

2

3

B-09 (B)

AB

CONNECTOR: B-09

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-436

STEP 4. Check connector B-09 at camshaft position 
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 5.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 19.

STEP 5. Measure the sensor supply voltage at camshaft 
position sensor connector B-09.
(1) Disconnect the connector B-09 and measure at the harness 

side.

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

(3) Measure the voltage between terminal No. 2 and ground.

• Voltage should be between 4.8 and 5.2 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.8 and 5.2 volts?

YES : Go to Step 10.
NO :  Go to Step 6.

AK300411

1

2

3

B-09 (B)

AB

CONNECTOR: B-09

HARNESS CONNECTOR:
COMPONENT SIDE

AK300411

1

2

3

B-09 (B)

AB

CONNECTOR: B-09

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01421AL

B-09 HARNESS 
CONNECTOR: 
COMPONENT SIDE

3 2 1