Page 1 of 13

SUBJECT:

MIRAGE & MIRAGE G4 SRS WARNING LAMP
ILLUMINATION DTC B1479

No:

TSB-18-52B-001

DATE:

October 2018

MODEL:

See Below

CIRCULATE TO:

[ ] GENERAL MANAGER

[ X ] PARTS MANAGER

[ X ] TECHNICIAN

[ X ] SERVICE ADVISOR

[ X ] SERVICE MANAGER

[ X ] WARRANTY PROCESSOR

[ ] SALES MANAGER

PURPOSE
On certain vehicles, the Supplemental Restraint System (SRS) Air Bag Warning Lamp illuminates
with DTC B1479 (SRS-ECU Backup capacitor circuit voltage too Low.)
When the battery voltage becomes low, the back up capacitor's diagnosis function may judge
backup capacitor failure and set DTC B1479. The SRS-ECU must be replaced due to the incapability
to erase DTC B1479 via MUT-III.
This TSB instructs dealers to reprogram the SRS-ECU with updated software to correct the issue.

AFFECTED VEHICLES
D

2014, 2015, 2017 - 2019 Mirage

D

2017 - 2019 Mirage G4

REQUIRED OPERATIONS
1.

Confirm your MUT-III is updated with the latest reprogramming database.

2.

Reprogram the SRS-ECU with the new software. Refer to the “SRS-ECU Reprogramming Chart”
for new software information.

SPECIAL EQUIPMENT
If necessary, the following equipment is needed to reprogram the SRS-ECU.
D

VCI (Vehicle Communication Interface) or VCI Lite - MB991824 or MB992744V.

D

MEDIC Laptop/Tablet with A/C power adapter - MIT540031, or FZG1MK2.

D

MUT-lll main harness 'A' (blue connector at the DLC end) - MB992745V

D

USB 2.0 cable - RRAR1MBR108GL

D

MEDIC 3.5/4 update at 557 or higher.

D

For Standalone MUT-III units, MUT3 SE Reprogramming Database N180901 or higher.

Copyright 2018, Mitsubishi Motors North America, Inc.

Continued

The information contained in this bulletin is subject to change. For the latest version of this document, go to the Mitsubishi
Dealer Link, MEDIC, or the Mitsubishi Service Information website (www.mitsubishitechinfo.com).

(4731)

Page 2 of 13
TSB-18-52B-001

SRS-ECU REPROGRAMMING CHART
Model

Mirage
Mirage G4

Part Name

CONTROL
UNIT, SRS
DIAGNOSIS

ECU Part Number

Data Number

8635A235

Software Part Number
Previous

NEW

8635A650

8635A235 00
8635A235 01

8635A235 02

8635A353

8635A651

8635A353 00
8635A353 01

8635A353 02

8635A374

8635A652

8635A374 00
8635A374 01

8635A374 02

8635A394

8635A653

8635A394 00
8635A394 01

8635A394 02

8635A410

8635A654

8635A410 00
8635A410 01

8635A410 02

8635A494

8635A655

8635A494 00

8635A494 01

8635A495

8635A656

8635A495 00

8635A495 01

8635A426

8635A657

8635A426 00

8635A426 03

8635A505

8635A658

8635A505 00

8635A505 01

REPAIR PROCEDURE
SOFTWARE/MEDIC VERSION VERIFICATION
1.

Verify that the ECU has not already been updated to the latest S/W number in the table above.
If the SRS-ECU is at the latest level, reprogramming is not necessary.
For MEDIC 3.5/4 users only: (MUT-III STV users go to
step 4)
2.

Verify the MEDIC 3.5/4 is at version 3.5 and at
update 557 or higher.
If your MEDIC 3.5/4 update is at least 557, continue
with the Reprogramming Procedure on page 4.

Version and Update
numbers

If your MEDIC 3.5/4 update is below 557, update
your MEDIC as follows.

Page 3 of 13
TSB-18-52B-001

3.

If the MEDIC update screen advises updates are
available, click the “Begin” button. After all updates
are complete, GO TO THE REPROGRAMMING
PROCEDURE.

4.

Using MEDIC, from the main page, click the
“MUT3-SE” icon at the top center of the screen to
open MUT-III SE.

Click “Begin”

Click the “STV” button.

a.

Click on the “ECU Reprogram” button.

Page 4 of 13
TSB-18-52B-001

b. Click “SDB Data List.”

N180901

c.

Confirm that the database number displayed in
the upper right above the chart is N180901 or
higher

D

If the database number displayed on your
MUT3-SE is N180901 or greater, continue to the
“Reprogramming Procedure.”

D

If the reprogramming database number
displayed on your MUT3-SE is lower than
N180901, then the MUT3-SE database needs to
be updated.

REPROGRAMMING PROCEDURE
NOTE:

VCI Stand-alone reprogramming is not available for this procedure.
The laptop/tablet and the VCI must remain connected for the entire procedure.

! CAUTION

1.

To ensure that the vehicle battery maintains 12V during the procedure, hookup a battery charger to the vehicle during the procedure.
Connect the equipment as follows:

NOTE: VCI Lite and MEDIC 4.0 Toughpad shown for illustration purposes only.

Page 5 of 13
TSB-18-52B-001

D

Turn the MEDIC PC/tablet on. If the battery
indicator in the lower right hand corner of the
screen does not show a full charge, it is
recommended that either the battery be charged
prior to beginning, or be used with the A/C power
adaptor connected.

D

Connect the USB cable to the VCI/VCI Lite.

D

When the laptop/tablet displays the MEDIC main
screen, connect the USB cable to the device.

D

Connect the MUT-III main harness with the blue
DLC connection to the VCI/VCI Lite.

D

Connect the blue connection of the MUT-III main
harness to the vehicle's data link connector.

D

For VCI only (P/N MP991824): Turn the VCI power
switch ON. Verify that the indicator lamp in the
upper right corner of the screen is green.

Data Link Connector
(Blue End)
MUT-III
Main Harness

USB Cable
Toughpad
(back)

VCI Lite

! CAUTION

DO NOT DISTURB THE HARNESS CABLES OR CONNECTIONS DURING THE REPROGRAMMING
PROCESS AS IT COULD CAUSE THE CONTROL UNIT TO LOSE DATA. IF THE USB CABLE IS
DISCONNECTED DURING THIS PROCEDURE, A WARNING MESSAGE WILL DISPLAY.
2.

Turn the ignition switch to the “ON” position.
3.

Using MEDIC, from the main page, click the
“MUT3-SE” icon at the top center of the screen to
open MUT-III SE.
Click the “STV” button.

Page 6 of 13
TSB-18-52B-001

4.

The System Select screen opens and populates
with some basic information from the vehicle.
If the class has to be chosen from the drop down
menu, then please look at the label on the
passenger side B pillar to identify the appropriate
class.
Then select the correct class from the drop-down
list.

5.

Verify that the SRS-ECU has not already been updated to the latest S/W number in the table
above.
If the SRS-ECU is at the latest level, reprogramming is not necessary.
a.

Select “SRS-ECU” from the System List, then
click on the check mark at the bottom of the
screen.

Page 7 of 13
TSB-18-52B-001

b. Select “Special Function.”

c.

b.

8635A23501

Select “ECU Information.”

If the Software Part Number listed is NOT at
the latest level (shown in the “SRS-ECU
Reprogramming Chart“), proceed with the
next steps.

Page 8 of 13
TSB-18-52B-001

6.

Before reprogramming, perform an “Erase and Read All DTCs” to clear any DTCs that may have
set.
a.

Click on the home button to go back to the
System Select screen.
Click the “ALL DTC” button.

b. Select “Erase and Read all DTCs.”

c.

A window will pop up asking you to confirm DTC
erasing. Click the check mark in the dialog box
for DTC erasing and reading to begin.

d. The “System List” on the left side of the screen
will have all selections checked. Do NOT change
these selections.
e.

Click the check mark at the bottom of the page
to continue.

Page 9 of 13
TSB-18-52B-001

7.

When DTC erasing is completed, click the check
mark in the pop-up message that read “All erasing
and checks are complete.”
a.

If DTCs return after erasing is completed, 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, then click the Home icon in
the lower left to return to the System Select
menu.

8.

Reprogram the SRS-ECU following the steps below.
a.

Click on the Reprogram button.

b. Select “ECU Reprogramming (SDB).”

Page 10 of 13
TSB-18-52B-001

c.

Verify the “SRS-ECU” is selected in the System
List, then click the check mark at the bottom of
the page.

d. Verify the correct Data No. is listed in the
“SRS-ECU Reprogramming Chart.”

e.

Click the check mark at the bottom of the page
to initiate reprogramming.

f.

Click the check mark in the
reprogramming data” dialog box.

“Check

Page 11 of 13
TSB-18-52B-001

g. Once the reprogramming is initiated, the
screen shown will indicate the reprogramming
progress.

Do NOT disturb the cables or turn off the ignition during
reprogramming.

h. Click the check mark in the “Completed” dialog
box.

i.

Verify the correct information is listed in the
table. Click the check mark at the bottom of the
page, then click the Home button to return to
the System Select screen.

j.

Click the home icon on the bottom of the page.

Page 12 of 13
TSB-18-52B-001

9.

Perform an “Erase and Read All DTCs” again to clear any DTCs that may have set.
For instructions, refer to steps 6 and 7 in this TSB.
a.

If any DTCs appear, troubleshoot per the applicable Service Manual.
10. Verify that the software Part Number is now at the
latest
number
listed
in
the
“SRS-ECU
Reprogramming Chart” in this TSB.
For instructions, refer to step 5 in this TSB.
8635A23502

11. Turn off the ignition switch and disconnect the MUT-III. Turn off and disconnect the battery
charger.
12. Test drive the vehicle to confirm proper operation.

Page 13 of 13
TSB-18-52B-001

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.

Operation

Labor Operation Code

Nature Code

Cause Code

Time
Allowance

Reprogram SRS Control
Unit

528511VD

16D

4B0

0.4 hr.