Mitsubishi Lancer Evolution X. Manual - part 365

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-525

DTC P0513: Immobilizer Malfunction

.

TECHNICAL DESCRIPTION

• ECM monitors the communication condition with 

the immobilizer-ECU. When an abnormality in 
communication is found, ECM prevents engine 
start.

.

DTC SET CONDITIONS

Check Condition

• Ignition switch is "ON" position.

Judgment Criterion

• When it was different in the encrypted code sent 

from immobilizer-ECU and operation result by 
ECM.

.

FAIL-SAFE AND BACKUP FUNCTION

• Engine start is prohibited.

.

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

• CAN system failed.
• Immobilizer system failed.
• ECM failed.

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, check VIN Information.

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) Set scan tool MB991958 to the coding mode for VIN 

Information.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Has VIN (current) been written?

YES : Go to Step 2.
NO :  Write VIN. Then go to Step 2.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-526

STEP 2. Using scan tool MB991958, read the immobilizer 
diagnostic trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) Read the immobilizer-DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the immobilizer-DTC set?

YES : Refer to GROUP 42B, Diagnosis − Diagnostic Trouble 

Code Chart <Vehicles with KOS> 

P.42B-23

 or 

GROUP 42C, diagnosis − Diagnostic Trouble Code 

Chart <Vehicles with WCM> 

P.42C-14

.

NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read the diagnostic 
trouble code (DTC)
(1) Turn the ignition switch to the "ON" position.
(2) After the DTC has been deleted, read the DTC again.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0513 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-11

 or GROUP 42C, ID Codes 

Registration Judgment Table <Vehicles with WCM> 

P.42C-9

.

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

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-527

DTC P0551: Power Steering Pressure Switch Circuit Range/Performance

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CIRCUIT OPERATION

• A battery positive voltage is applied to the power 

steering pressure switch output terminal (terminal 
No. 1) from the ECM (terminal No. 58) via the 
resistor in the ECM.

.

TECHNICAL DESCRIPTION

• The power steering pressure switch converts the 

existence of a power steering load into a high/low 
voltage, and inputs it into the ECM.

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2

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1

POWER STEERING PRESSURE SWITCH CIRCUIT

POWER STEERING
PRESSURE SWITCH

B-09

B-19

AB

1

58

OFF

ON

ENGINE
CONTROL
MODULE

BLA

CK-WHITE

AK704227

Connector: B-09

ECM

B-09 (GR)

AB

AK704284AB

Power steering
pressure switch

Connector: B-19

B-19

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-528

• When the steering wheel is turned, hydraulic 

pressure rises. The power steering pressure 
switch closes, and the applied battery positive 
voltage will be grounded. With this, the power 
steering pressure switch output voltage will fluc-
tuate between 0 and 12 volts.

• While driving with the steering wheel held 

straight, the power steering pressure switch turns 
"OFF".

• The ECM checks whether the power steering 

pressure switch turns "OFF" or "ON" during driv-
ing.

.

DESCRIPTIONS OF MONITOR METHODS

Power steering pressure switch stays on during 

specified go/stop operations.

.

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)

• Engine coolant temperature sensor

.

DTC SET CONDITIONS
Logic Flow Chart

Yes

No

No

No

Monitoring

conditions

End

Malfunction

Good

Start

Power steering

switch ON

Yes

Go/stop operation

for specified times

Yes

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