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SUBJECT:

NOISE NEAR RIGHT SUBWOOFER WHEN
DRIVING OR USING AUDIO
(ROCKFORD FOSGATE)

No:

TSB-20-54-004

DATE:

November 2020

MODEL:

2018-19 Eclipse Cross

CIRCULATE TO:

[ ] GENERAL MANAGER

[ X ] PARTS MANAGER

[ X ] TECHNICIAN

[ X ] SERVICE ADVISOR

[ X ] SERVICE MANAGER

[ X ] WARRANTY PROCESSOR

[ ] SALES MANAGER

PURPOSE
On vehicles equipped with the Rockford Fosgate® Premium Sound System, noise may occur near
the right subwoofer while driving and/or using audio.

BACKGROUND
The Rockford Fosgate® woofer box has the characteristic to resonate around 60Hz. When music
with a large amount of sound components near 60Hz is played at a certain volume or higher, the
vibration of the woofer box becomes greater, and the spot welding between the rear pillar
reinforcement and the quarter inner lower panel may fracture.
This TSB instructs dealers how to repair and reinforce the fractured area near the subwoofer by
installing the new Sub Woofer Kit and applying epoxy-resin structural adhesive in specified
locations.

AFFECTED VEHICLES
2018 - 2019 Eclipse Cross vehicles built before April 15, 2019

REPAIR PROCEDURE
! CAUTION

Use all tools with care to prevent scratches on interior trim.
1.

Confirm the affected vehicle is equipped with the Rockford Fosgate® Premium Sound System.

2.

BEFORE disconnecting the battery, write down all the customer’s audio presets and settings
in the table below.
PRESETS

1

2

3

4

5

6

AM
FM1
FM2
SXM*

* If applicable.
Copyright 2020, 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).
(4883)

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TSB-20-54-004

3.

Disconnect the negative (-) battery terminal.
a.

In order to remove the seat belt with pre-tensioner, disconnect the terminal according to
the procedures and instructions described in the Service Manual:
Refer to Group 52B-Supplemental Restraint System (SRS) / Seat Belts with Pre-Tensioner
/ Removal and Installation.

b. After disconnecting the battery cable, wait 60 seconds or more before proceeding with the
following step.
!

WARNING The SRS system is designed to retain enough voltage to deploy the air bag
for a short time even after the battery has been disconnected, a serious injury may result
from unintended air bag deployment if work on the SRS system is done immediately after
the battery cables are disconnected.
c.
4.

After waiting at least 60 seconds, tape the disconnected battery cable with insulating tape.

Remove parts around the sub-woofer.
NOTE: For clip and claw positions, refer to diagram on next page, “Quarter Trim Details.”
For more detailed information, refer to the Service Manual, Group 52A-Interior / Trims / Interior Trims
/ Quarter Trim.

a.

Quarter Trim
Lower RH

b. Remove the quarter trim lower panel RH.

c.
Pre-tensioner

Fold the back seat (to allow working space).

Quarter Trim
Upper RH

Remove the rear seat belt pre-tensioner
and the Quarter trim upper panel RH.

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TSB-20-54-004

Quarter Trim Details
(from Service Manual,
52A-Interior / Trims)

Cross Section A-A

Cross Section B-B

Cross Section C-C

1. Parcel strap hook

4. Quarter trim hook

7. Quarter panel silencer

2. Cargo room light assembly

5. Rear seat belt clip

8. Quarter trim upper

3. Quarter trim lower assembly

6. Quarter trim lower

9. Quarter trim bracket

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TSB-20-54-004

Bolts

e.

d. Remove four bolts and the subwoofer.

Remove two clips (P/N MU001484) and move the harness to allow working space.

Clips

f.

Claw Position

Remove the front sound absorbing material (sponge).

Sound Absorbing Material (sponge)

Quarter Inner Lower Panel RH

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5.

Adhesive application and assembly of the Subwoofer Reinforce (p/n 5301G926).
! WARNING

Be careful to NOT get injured when handling the subwoofer reinforce, and
when drilling and deburring the part. Wear protective gloves and dust proof goggles to prevent
chips from getting into your eyes.
a.

Cloth

Place a cloth or rag in the space behind the
panel, as shown. This is for catching chips
from drilling and preventing bolts and nuts
from falling in when tightening.

b. Place the subwoofer reinforce (p/n 5301G926) onto the quarter inner lower panel RH and
tighten the center with the washer bolt (p/n MS240141) for positioning.
Tightening Torque: 4 - 6 N*m
Subwoofer Reinforce
(p/n 5301G926)

Holes for
Drilling
Washer Bolt
(M6x16mm)
MS240141

10 mm

c.

Wrap the drill bit with vinyl tape so that only
10 mm from the tip is exposed, as shown.
This is to prevent the outer panel from
being penetrated by the drill when drilling
the panel.

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d. Protect the harnesses, pre-tensioner connectors, and the pre-tensioner assembly to
prevent damage and chips.
Connector Protection

Harness Protection

e.

Mark the center of the holes (three places) of the subwoofer reinforce (5301G926) with a
pin punch.

f.

After making a pilot hole using a Φ3.0 drill based on the marking, drill a hole with a Φ6.0 to
6.5 drill.

g. Remove the subwoofer reinforce (5301G926) once, deburr the drilled part (recommend to
use a deburr reamer), and perform anticorrosion treatment with touch-up.
h. Carefully degrease the adhesive surface of both the quarter inner lower panel RH and the
subwoofer reinforce (5301G926) using Mitsubishi genuine parts cleaner (MZ100387) or
equivalent.
i.

Squeeze out approximately 4g of adhesive
(Epoxy-resin structural adhesive) on the
pallet.
Brand of adhesive to be used: Sumitomo 3M
Auto mix panel bond 8115 (or equivalent)

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j.

Apply a thin layer of adhesive to the entire surface of the subwoofer reinforce (5301G926)
and retighten the center with the washer bolt (MS240141).
Coating thickness: approx. 0.5 ~ 1.0mm

Refer to illustration below for Application area.
NOTES: Do NOT apply 5 mm from edges to prevent protrusion.
Do NOT apply around the hole to prevent adhesion to the subwoofer fixing nut.

Cross Section A-A

Application

5 mm

Do Not Apply
Around Hole
Application

A

5 mm

5 mm

A

Do Not Apply 5 mm from Edges

5 mm

k.

Tighten the washer bolt.
Tightening torque: 4 - 6 N*m

Washer Bolt
(M6x16mm)
MS240141

l.

Nuts
(M6)
(MF430004)

Fasten the flange bolts (MU001660) and
nuts (MF430004) in three places shown.
NOTE: Back side of quarter inner lower panel
shown.

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Flange Bolt (M6x8mm)
(MU001660)

m. Fasten the flange bolts in three places,
Flange bolt tightening torque: 14 N*m

n. After fastening the flange bolts remove the
center washer bolt (MS240141).
o. Wipe off any adhesive that oozes out,
especially in the area circled in the photo.
IMPORTANT: Be especially careful NOT to
stain the seat belt on the seat belt side.
p. Remove the cloth/rag covering the space
behind the panel.

6.

Reassemble all removed parts.
D

If the harness clip is damaged when removed, replace it with a new one.

D

After attaching the subwoofer, wipe off any adhesive if it spills out.
IMPORTANT: Be especially careful NOT to stain the seat belt on the seat belt side (circled
area in photo above).

7.

8.

Reconnect the negative (-) battery terminal.
D

Restore all customer audio presets and settings.

D

Initialize the throttle control servo and learn the fully closed position of the power window.

Confirm that the SRS warning lamp is OFF, after all work is finished.

Check Procedure of SRS Warning Lamp
Follow the SRS warning lamp check procedure described in the Service Manual:
1. Check SRS warning lamp is illuminated when the ignition switch is turned “ON".
2. Check that SRS warning lamp is extinguished after approximately 6 to 8 seconds,
and check that the warning lamp remains extinguished afterward.
3. Except the above, the SRS system is abnormal. Thus, check the diagnosis code.

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PARTS INFORMATION
Order only the Genuine Mitsubishi Parts listed below.
Kit Part
Number

Part Name

Reinforce, Sub Woofer Kit

Items in Kit

Quantity

5301J843

1

Part Name

Part Number

Qty

Clip, Wire Harness

MU001484

2

Nut (6)

MF430004

3

Bolt, Flange (6.0x8)

MU001660

3

Bolt, Washer
Assembled (6x16)

MS240141

1

Reinf., Sub Woofer

5301G926

1

Part Name

Part Number

Quantity

Comments

Epoxy-resin Structural Adhesive:
Sumitomo 3M Automix Panel
Bond 8115, or equivalent

-

As Needed

Purchase structural adhesive
from aftermarket, and claim
actual expenses

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.
Labor Operation
Code

Operation

Nature Code

Cause Code

Time
Allowance

545034XB

Reinforcement and Addition of
Adhesive to Broken Spot Weld
Area near Subwoofer

(B Code: 80,
strange noise)

(A Code: 10,
broken or
cracked)

1.0 hrs

Warranty Coverage: 5/60 Basic Coverage (Canada: 5/100)