Mitsubishi Lancer Evolution X. Manual - part 408

 

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Mitsubishi Lancer Evolution X. Manual - part 408

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-697

STEP 4. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) After the MFI-DTC has been deleted, read the MFI-DTC 

again.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U0141 set?

YES : Replace the ETACS-ECU. When the ECM is 

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

P.42B-14

 or GROUP 42C, ID 

Codes Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

. Then go to Step 6.

NO :  It can be assumed that this malfunction is intermittent 

of CAN bus line between ECM and ETACS-ECU. 
Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points − How to 

Cope with Intermittent Malfunctions 

P.00-15

.

STEP 5. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) After the MFI-DTC has been deleted, read the MFI-DTC 

again.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U0141 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-14

 or GROUP 42C, ID Codes 

Registration Judgment Table <Vehicles with WCM> 

P.42C-10

. Then go to Step 6.

NO :  It can be assumed that this malfunction is intermittent 

of CAN bus line between ECM and ETACS-ECU. 
Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points − How to 

Cope with Intermittent Malfunctions 

P.00-15

.

STEP 6. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) After the MFI-DTC has been deleted, read the MFI-DTC 

again.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U0141 set?

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-698

DTC U0167: Immobilizer Communication Error

CAUTION

• If the ECM output the DTC U0167, make sure 

to diagnose the CAN bus line.

• Before replacing the ECU, make sure that the 

communication circuit is operating normally.

.

DTC SET CONDITIONS

Check Conditions

• Ignition switch is in "ON" position.
• Battery positive voltage is 8 volts or higher.

Judgement Criterion

• Unable to receive KOS-ECU/WCM (immobi-

lizer-ECU) signals through the CAN bus line.

.

COMMENT

Current Trouble

• Some of the possible causes are a harness or 

connector damage between the ECM and the 
KOS-ECU/WCM (immobilizer-ECU) on the CAN 
bus line, a failure in the KOS-ECU/WCM (immo-
bilizer-ECU) power supply system, a failure in the 
KOS-ECU/WCM (immobilizer-ECU), or a failure 
in the ECM.

Past Trouble

• Proceed to troubleshoot based on a harness or 

connector damage on the CAN bus line between 
the ECM and KOS-ECU/WCM (immobi-
lizer-ECU), and a failure in the KOS-ECU/WCM 
(immobilizer-ECU) power supply system. Refer to 
"How to cope with past trouble" (Refer to GROUP 
00, How to Use Troubleshooting/Inspection Ser-
vice Points − How to Treat Past Trouble 

P.00-16

).

NOTE: If a malfunction occurred in the past, a failure 
cannot be discovered through the MB991958 CAN 
bus diagnosis even if there might be a problem with 
the CAN bus. In this case, refer to GROUP 00, How 
to Use Troubleshooting/Inspection Service Points 

 

How to Cope with Intermittent Malfunctions 

P.00-15

Furthermore, it is possible to narrow down the areas 
of the possible failures from the DTCs that are output 
by the ECUs, which are communicating on the CAN 
bus (Refer to GROUP 54C, CAN bus line Diagnos-
tics Flow 

P.54C-11

).

.

FAIL-SAFE AND BACKUP FUNCTION

• Engine start is prohibited.

.

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

• CAN line harness damage or connector damage.
• KOS-ECU/WCM (immobilizer-ECU) 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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-699

STEP 1. Using scan tool MB991958, diagnose CAN bus 
line.

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) Diagnose CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line normal?

YES : Go to Step 2.
NO :  Repair the CAN bus line. Refer to GROUP 54C, Can 

Bus Diagnostics Tabl

P.54C-17

. Then go to Step 3.

STEP 2. Using scan tool MB991958, read the 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 Refer to GROUP 42B, Keyless Operation 

System − Diagnosis Trouble Code Chart <Vehicles 

with KOS> 

P.42B-27

 or GROUP 42C, Wireless 

Control Module − Diagnosis Trouble Code Chart 

<Vehicles with WCM> 

P.42C-16

.

NO :  Go to Step 3.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-700

STEP 3. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) After the MFI-DTC has been deleted, read the MFI-DTC 

again.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U0167 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-14

 or GROUP 42C, ID Codes 

Registration Judgment Table <Vehicles with WCM> 

P.42C-10

NO :  It can be assumed that this malfunction is intermittent 

of CAN bus line between ECM and KOS-ECU/WCM 
(immobilizer-ECU). Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points − How to 

Cope with Intermittent Malfunctions 

P.00-15

.

DTC U1180: Combination Meter Time-out

CAUTION

• If the ECM output the DTC U1180, make sure 

to diagnose the CAN bus line.

• Before replacing the ECU, make sure that the 

communication circuit is operating normally.

.

DESCRIPTIONS OF MONITOR METHODS

There is no data from combination meter for the 

specified time. (Meter also detect communication 
error with ECM.)

.

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)

• Not applicable

.

 

 

 

 

 

 

 

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