Mitsubishi Outlander GS45X. Manual - part 952

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-741

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. 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 (Refer to, Removal and Installation 

P.13B-903

). 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.

DTC U0167: KOS-ECU/WCM 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 "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.

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-742

COMMENT

Current Trouble

• Some of the possible causes are a harness or 

connector damage between the ECM and the 
KOS-ECU/WCM on the CAN bus line, a failure in 
the KOS-ECU/WCM power supply system, a fail-
ure in the KOS-ECU/WCM, 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, and a failure in 
the KOS-ECU/WCM power supply system. Refer 
to "How to cope with past trouble" (Refer to 
GROUP 00, How to Use Troubleshooting/Inspec-
tion Service Points 

− How to Cope with Intermit-

tent Malfunctions 

P.00-15

).

CAUTION

When the ignition key is maintained within the 
range "A" (i.e., the ignition switch IG2 is in OFF 
position but the cranking does not start) for more 
than 1 second, ECM stores DTC U0167 (the past 
trouble).
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, Explanation About The 
Scan Tool (M.U.T.-III) Can Bus Diagnostics 

P.54C-10

).

.

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

• CAN line harness damage or connector damage.

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

AK700540AB

ACC position

Lock (off)
position

ON position

Start
position

Range
"A"

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-743

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, 

Diagnosis 

− CAN Bus Diagnostics Table 

P.54C-17

. 

Then go to Step 4.

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 GROUP 42B, Diagnosis 

− Diagnostic 

Trouble Code Chart <Vehicles with KOS> 

P.42B-35

 

or GROUP 42C, Diagnosis 

− Diagnostic Trouble 

Code Chart <Vehicles with WCM> 

P.42C-18

.

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 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 (Refer to, Removal and Installation 

P.13B-903

).  Then go to Step 4.

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

.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-744

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 U0167 set?

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

DTC U0415: Invalid Data Received from ASC-ECU <Vehiles with ASC>

CAUTION

• If the ECM output the DTC U0415, 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

• After 5 seconds have passed since the ignition 

switch was turned to "ON" position.

• While engine is running.

Judgement Criterion

• When the communication error is judged 

between the ECM and the ASC-ECU.

.

COMMENT

Current Trouble

• Some of the possible causes are a harness or 

connector damage between the ECM and the 
ASC-ECU on the CAN bus line, a failure in the 
ASC-ECU power supply system, a failure in the 
ASC-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 ASC-ECU, and a failure in the 
ASC-ECU power supply system. Refer to "How to 
cope with past trouble" (Refer to GROUP 00, 
How to Use Troubleshooting/Inspection Service 
Points 

− How to Treat Past Trouble 

P.00-17

).

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, Explanation about the 
Scan Tool (M.U.T.-III) CAN Bus Diagnostics 

P.54C-10

].

.

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

• CAN line harness damage or connector damage.

• ASC-ECU failed.

• ECM failed. 

DIAGNOSIS

Required Special Tool:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A