Mitsubishi Evolution X. Manual - part 269

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-53

DIAGNOSIS

Required Special Tools

• MB991958: Scan tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958, read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the diagnostic trouble code other than P0011 set?

YES : Refer to, Diagnostic Trouble Code Chart 

P.13A-44

.

NO :  Go to Step 2.

STEP 2. Check intake engine oil control valve itself.

• Check intake engine oil control valve itself (Refer to Engine 

Oil Control Valve Check 

P.13A-912

).

Q: Is the check result normal?

YES : Go to Step 3.
NO :  Replace intake engine oil control valve. Then go to 

Step 6.

STEP 3. Check oil passage of intake variable valve timing 
control system for being clogged.
Q: Is the check result normal? 

YES : Go to Step 4.
NO :  Repair it. Then go to Step 6.

STEP 4. Check intake variable valve timing sprocket 
operation mechanism for being stuck.
Q: Is the check result normal?

YES : Go to Step 5.
NO :  Repair it. Then go to Step 6.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-54

STEP 5. Check the trouble symptoms.
(1) Carry out test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Pattern 20 

P.13A-9

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0011 set?

YES : Replace the ECM. When the ECM is replaced, 

register the ID code. Refer to GROUP 42B, ID Code 
Registration Necessity Judgment Table <Vehicles 
with KOS> 

P.42B-12

 or GROUP 42C, ID Codes 

Registration Judgment Table <Vehicles with WCM> 

P.42C-9

. Then go to Step 6.

NO :  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.00-15

.

STEP 6. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Pattern 20 

P.13A-9

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0011 set?

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

DTC P0012: Camshaft Position 

− Timing Over-Retarded

.

TECHNICAL DESCRIPTION

• If the vehicle equipped with 4B11-T/C engine 

continues the rough driving like competitive run-
ning (the running that constantly repeats the 
cycle of the full opened position of the accelerator 
pedal and the full closed position of the accelera-
tor pedal.), the amount of carbon mixed into the 
engine oil tends to increase. This can possibly 
cause the timing chain to gradually elongate. To 
prevent this, the function or logic monitoring the 
amount of elongation of the timing chain is inte-
grated into the ECM. The details are shown in 
timing chain maintenance (Refer to GROUP 00, 
Precautions Before Service 

− Timing Chain Main-

tenance 

P.00-33

).

.

DTC SET CONDITIONS

Check Condition

• Ignition switch is "ON" position.

Judgment Criterion

• The learning value for the current phase angle of 

V.V.T. at the intake (retard angle) side and the 
exhaust (advanced angle) side is different from 
the initial phase angle of V.V.T. by more than the 
specified value.

.

FAIL-SAFE AND BACKUP FUNCTION

• None

.

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

• Timing chain elongated.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

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DIAGNOSIS

STEP 1. Timing Chain Elongation Visual Check
Refer to GROUP 11A, On-vehicle Service 

− Timing Chain Elon-

gation Visual Check 

P.11A-17

.

Q: Are there any abnormalities?

YES : Initialize the learning value for the elongation of the 

timing chain. Refer to GROUP 00, Precautions Before 
Service 

− Timing Chain Maintenance 

P.00-33

.

NO :  Replace the timing chain and the oil pump chain. 

Then initialize the learning value for the elongation of 
the timing chain. Refer to GROUP 00, Precautions 
Before Service 

− Timing Chain Maintenance 

P.00-33

.

DTC P0014: Exhaust Variable Valve Timing System Target Error

.

TECHNICAL DESCRIPTION

• The ECM checks the variable valve timing sys-

tem for malfunction.

.

DESCRIPTIONS OF MONITOR METHODS

The phase angle of the exhaust camshaft is higher 

than the specified value.

.

MONITOR EXECUTION

Continuous

.

MONITOR EXECUTION CONDITIONS 
(Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Camshaft position sensor

• Crankshaft position sensor

• Engine coolant temperature sensor

• Throttle position sensor

• Engine oil control valve

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

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DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

• More than 20 seconds have passed since the 

engine starting sequence was completed.

• Engine speed is 1,188 r/min or more.

• Engine coolant temperature is higher than 76° C 

(169

° F).

Judgment Criterion

• The phase angle of the exhaust camshaft is 5 

degrees or more for 5 seconds.

.

FAIL-SAFE AND BACKUP FUNCTION

• None

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function 

− OBD-II Drive Cycle − 

Pattern 20 

P.13A-9

.

.

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

• Exhaust engine oil control valve failed.

• Oil passage of variable valve timing control sys-

tem clogged.

• Exhaust variable valve timing sprocket operation 

mechanism stuck.

• ECM failed.

AK704222

Start

Yes

Yes

Yes

No

No

No

|Cam angle-target| 

> 5˚CA

Continuous

failure for 5secs

Malfunction

End

Good

Monitoring
conditions

Cam angle: Intake valve open timing (intake side)
                   Exhaust valve close timing (exhaust side)