Engine Controls - MIL ON, DTC P0420 Set
No: TSB-12-13-005DATE: November, 2012
MODEL: See below
SUBJECT:
ECM REPROGRAMMING FOR FALSE MIL (DTC
PURPOSE
Some affected vehicles may display an illuminated MIL with DTC P0420: Warm Up Catalyst Efficiency
Below Threshold, recorded in the ECM. An incorrect parameter in the judgment criteria may cause a false MIL (mis-detection of a fault when an abnormal condition is not present).
This TSB provides dealers with a procedure to reprogram the ECM with new software to correct the condition.
AFFECTED VEHICLES
2008-2010 Outlander w/4B12 2.4L, CVT, 2WD/4WD
2009-2010 Lancer w/4B12 2.4L, CVT or M/T
2010 Lancer Sportback w/4B12 2.4L, CVT or M/T
2010 models: Applies to FEDERAL Emissions vehicles only.
REQUIRED OPERATIONS
IMPORTANT:
If an affected vehicle has a Malfunction Indicator Lamp (MIL) illuminated before reprogramming and DTCs other than those described above are listed in the ECM memory, diagnose and repair those DTCs per the service manual before reprogramming. DO NOT reprogram the ECM
until the reason(s) for other DTCs being set is corrected.
OVERVIEW
1. Confirm MUT-III software contains the latest reprogramming database
2. Reprogram the ECM with new software per the Reprogramming Procedure.
3. Perform "Erase and Read All DTCs."
4. Perform a test drive to confirm DTCs do not return.
EQUIPMENT
The following equipment is needed to reprogram the ECM.
^ MEDIC laptop computer with A/C power adaptor - 520924, or MIT547708.
^ VCI (Vehicle Communication Interface) - MB991824.
^ MUT-III main harness 'A' (blue DLC connector) - MB991910.
^ USB 2.0 cable - MB991827.
^ "Engine Compartment/Control Module" label - p/n MSSF024G00.
^ Reprogramming Database N12091 or higher
^ MEDIC 3 update at 155 or higher.
^ Standalone MUT-III laptop with Reprogramming CD 2/12 installed.
ECM REPROGRAMMING CHART
REPAIR PROCEDURE
NOTE:
Reprogramming the ECM with the latest database (i.e.12091) includes all past and current reprogramming for TSBs of affected vehicles. You do not need to reprogram the ECM for each TSB.
1. Check the underside of the hood to verify
there is no "Authorized Modification" label
(see page 11 for example) previously
installed to indicate this reprogramming has
already been completed. If a label is present
and the "ROM ID #" on the label matches
the "New S/W Part No." in the ECM
Reprogramming Chart above, the ECM is at
the latest level and reprogramming is not
necessary. Conduct normal diagnosis for
the subject DTCs.
For MEDIC 3 users only: (MUT-III users go to
step 5)
2. Verify the MEDIC 3 is at version 3.1 and at
update 155 or higher.
If your MEDIC 3 update is at least 155,
continue with the Reprogramming
Procedure.
If your MEDIC 3 update is below 155,
update your MEDIC 3 as follows.
3. Select the MEDIC 3 Admin tab and click
"Updates."
4. If the MEDIC update screen advises
updates are available, click the "Begin"
button. After all updates are complete, GO
TO THE REPROGRAMMING PROCEDURE
5. STANDALONE MUT-III SCAN TOOL
VIEWER (STV) ONLY: (MEDIC 3 USERS
GO TO THE REPROGRAMMING
PROCEDURE). Verify that
your MUT-III has the most current version of
the reprogramming database:
a. From the MUT-III Main Page:
^ Select "Special Function"
^ Select "ECU Reprogramming"
^ Select "Database File Display-CAN"
^ Confirm the database number displayed at the top right of the chart is N12091 or higher.
1. If the database number displayed on your
MUT-III is N12091 or higher, continue to the
Reprogramming Procedure.
2. If the database number displayed on your
MUT-III is lower than N12091, locate the
Yellow MUT-III Reflash CD 02/12 and follow
the instructions on the CD label to update
your MUT-III.
REPROGRAMMING PROCEDURE
CONNECT A BATTERY CHARGER TO THE VEHICLE'S BATTERY DURING THE
REPROGRAMMING PROCEDURE. DO NOT ALLOW THE BATTERY CHARGER TO TIME OUT.
BATTERY VOLTAGE (AS MEASURED AT THE BATTERY POSTS WITHOUT ELECTRICAL
LOAD) MUST BE KEPT AT 12.4V OR HIGHER IN ORDER TO REPROGRAM THE ECM.
MEASURE THE BATTERY VOLTAGE AND CHARGE AS NECESSARY.
NOTE:
VCI Stand-alone reprogramming is not available for this procedure. The laptop and VCI must remain connected for the entire procedure.
Connect the equipment as follows:
^ Turn the laptop computer on. If you're running on battery power and the charge indicator in the lower right hand corner of the screen does not show a full charge, it is recommended that either the laptop battery be charged prior to beginning, or that reprogramming be completed with the
A/C power adaptor connected to the laptop.
^ Connect the USB cable to the VCI.
^ When the laptop displays the MUT-III main screen, connect the USB cable to the laptop.
^ Connect the MUT-III main harness with the blue DLC connection to the VCI.
^ Connect the blue connector of the MUT-III main harness to the vehicle's data link connector.
^ Turn the VCI power switch ON. Verify that the indicator lamp in the upper right corner of the screen is green.
ECM Reprogramming
1. Conduct the following steps to reprogram
the ECM.
a. Turn the ignition switch to the ON position. If
the vehicle is equipped with the F.A.S.T. System,
the transmitter must remain in the vehicle for the
entire procedure.
b. If using MEDIC 3, from the main page, click the
MUT-III STV icon at the top center of the screen.
c. From the MUT-III Main Menu, select "Special
Function."
d. Select "ECU reprogramming."
e. Select "Automatic Reprogramming (CAN)."
f. Click the car icon at the bottom of the page.
g. If the VIN or vehicle description displayed does
not match the vehicle you are working on, click the
eraser icon at the bottom of the page.
Select VIN by clicking the VIN button.
h. Click the icon in the lower RH corner of the
screen to have MUT-III automatically read the
VIN. If a message appears saying that the VIN
cannot be input automatically, manually type the
17 digit VIN into the VIN field at the top of the
page.
Make sure the VIN is correct and click the check
mark.
i. Confirm that all data matches the vehicle and
click the check mark at the bottom of the page.
j. MFI should be highlighted as the default. If not,
click it to highlight it.
Click the check mark at the bottom of the page.
k. A message will advise you the system will
"Automatic search the data."
Click the check mark to continue.
ECM TO LATEST VERSION
If a "Complete Reprogramming" message does
not appear, continue with step l.
If this message is displayed, the ECM software is
already at the most current level. Do not continue
with this reprogramming procedure. This TSB
does not apply.
Click the check mark to clear the window, then
click the Home icon at the lower left corner of the
screen to return to the System Select main page.
Turn off the ignition switch and disconnect the
MUT-III. Turn off and disconnect the battery
charger. Conduct normal diagnosis.
l. The Automatic Reprogramming (CAN) database
screen will display.
Confirm the database number at the top right of
the table is N12091 or higher.
If more than one row is displayed in the table,
refer to the ECM Reprogramming Chart on page 2
to select the proper Data No. for this procedure
and select the appropriate row.
Click the correct row to highlight it.
Click the check mark to continue.
m. A message will ask you to "Check
reprogramming data."
n. Click the check mark to begin reprogramming.
It will take up to 5 minutes for reprogramming to
complete.
The Daytime Running Lights and both the engine
and condenser fans will automatically be turned
on during reprogramming. Care should be taken to
insure nothing gets caught in the moving blades.
The radio will be turned off and you will also hear
a chime in the interior for a short period of time.
These are normal conditions.
o. This message will display when ECM
reprogramming is successfully completed.
Confirm the "New S/W P/N" displayed matches
the table at the beginning of this TSB.
p. You will be prompted to turn the ignition switch
to the OFF position, wait at least 8 seconds, then
turn it back on.
q. Click the check mark and you will be returned to
the "ECU Reprogramming" page.
2. Click the Home icon at the lower left corner
of the page to return to the MUT-III main
page.
3. Using the MUT-III, check and erase ALL
DTCs from all systems as follows.
a. Select "Special Function."
b. Select "All DTCS," then select "ERASE AND
READ ALL DTCS."
c. The list on the left side of the screen
(System List) will have all selections
checked. Do not change these selections.
DTCs may be set if the vehicle is equipped
with options that are unchecked.
NOTE:
The list on the RH side of the screen
(Loading Option Setup) appears for Lancer based
vehicles. For those models, the check mark at the
bottom of the page is not highlighted (inactive) at
this time.
d. If the check mark at the bottom of the
screen is highlighted (active), click it and
proceed to step 4. If not proceed to step e.
e. In the System List, scroll to and click
FAST/IMMOB/KEYLESS/TPMS. In the Loading Option Setup list, check the correct OPC (VF#).
^ Vehicles with regular keyless entry (buttons on
an integrated key), select VF2.
^ Vehicles with F.A.S.T. key, select VF3.
f. In the System List, scroll to and select
METER. A window will display. Check the
correct display type for the vehicle.
The check mark at the bottom of the page
should be active. Click it to continue.
4. A window will display asking you to confirm
DTC erasing. Click the check mark for DTC
erasing and reading to begin.
5. When DTC erasing is completed, a window
will display.
a. If DTCs return after reprogramming,
click the check mark to clear the
window. Diagnose and repair per the
Service Manual.
b. If DTCs do not return, click the check
mark to clear the window and then
click the Home icon in the lower left of
the screen to return to the main
menu.
6. Turn off the ignition switch and disconnect
the MUT-III. Turn off and disconnect the
battery charger.
7. Using a ball-point pen, enter the appropriate Engine Control Module (ECM) part number, dealer code, and the current date on the Engine Compartment / Control Module Label (p/n MSSF024G00). The Vendor Code is not applicable. The label is available from your facing PDC.
8. Carefully remove all dirt and oil from a vacant area near the VECI label on the underside of the hood, and affix the Engine Compartment Label (LH side, above) to that area.
9. Test drive the vehicle to confirm proper operation and that the MIL does not illuminate. Diagnose and correct any DTCs that return.
PARTS INFORMATION
Use only the Genuine Mitsubishi Parts listed.
WARRANTY INFORMATION
This bulletin is supplied as technical information only and is not an authorization to repair. If an affected vehicle is reported with the described condition, diagnose the condition, repair as described in this
bulletin and submit a normal warranty claim using the following information.
ECM Reprogramming for DTC P0420