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Mitsubishi Outlander GS45X. Manual - part 719

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-699

DTC U0001: Bus Off

CAUTION

• If the ECM output the DTC U0001, 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 Condition

• Always

Judgement Criterion

• Bus off error detected

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

• CAN line harness damage or connector damage.

• 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, 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 san 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 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 3.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-700

STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U0001 set?

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

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

. Then go to Step 3.

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 3. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to the "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U0001 set?

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

DTC U0101: TCM Time-out

CAUTION

• If the ECM output the DTC U0101, 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 TCM 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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-701

DTC SET CONDITIONS

Lgic Flow Chart

Check Condition

• Battery positive voltage is between 10 and 16.5

volts.

Judgement Criterion

• Unable to receive TCM signals through the CAN

bus line for 4 seconds.

COMMENT

Current Trouble

• Some of the possible causes are a harness or

connector damage between the ECM and the
TCM on the CAN bus line, a failure in the TCM
power supply system, a failure in the TCM, 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 TCM, and a failure in the TCM
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

AK604369

Start

Yes

Continuous failure

for specified time

Malfunction

End

Good

Monitoring
conditions

Communication status

fails

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-702

NOTE: If a malfunction occurred in the past, a failure
cannot be discovered through the M.U.T.

−

III 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-10

OBD-II DRIVE CYCLE PATTERN

None.

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

• CAN line harness damage or connector damage.

• TCM 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, 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 6.

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

YES : Refer to GROUP 23A, Diagnosis

− Diagnostic

Trouble Code Chart

P.23A-29

NO : Go to Step 3.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

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