GROUP

NUMBER

CAMPAIGN

Technical Service Bulletin
SUBJECT:

DATE

23-01-058H
MODEL(S)

JULY 2023

Accent (RB)

UNDERBODY CORROSION PREVENTATIVE SERVICE
(SERVICE CAMPAIGN 992)

 IMPORTANT
Dealers must perform this service campaign on all affected vehicles prior to customer retail delivery
and whenever an affected vehicle is in the shop for any maintenance or repair.
Access the “Vehicle Information" screen via WEBDCS to identify open Campaigns.
Description: In some areas, a vehicle’s underbody may exhibit corrosion due to road salt usage. As
a preventative measure, cavity wax coating is applied to the internal surfaces of underbody
components, and an undercoating spray is applied to the bottom exterior surfaces of specified
underbody components. This bulletin describes the procedure to perform this preventative service on
certain Accent (RB) vehicles.

Applicable Vehicles (Certain):
• 2012-17MY Accent (RB) vehicles currently or ever registered in a Salt Belt State produced
03/23/2011 to 11/30/2017.
Salt Belt Areas include:
Connecticut, Delaware, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan,
Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island,
Vermont, Virginia, West Virginia, Wisconsin, and the District of Columbia.
Please note all dealers must perform this service campaign if vehicle comes in with an open
campaign, even if vehicle is no longer located in the listed states above.

i

Information

Allow the vehicle to cool at least four hours before performing the procedures in this TSB. Parking
the vehicle at the stall overnight is highly recommended to avoid a need for a cool down period
and improve work efficiency.

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

SUBJECT: UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

Table of Contents
Parts Information: .................................................................................................. 2
Recommended Tools and Equipment: .................................................................. 4
Warranty Information: ........................................................................................... 5
Service Procedures: .............................................................................................. 5
Wax Gun Preparation: ....................................................................................... 5
Remove Debris: ................................................................................................. 7
Vehicle Preparation: ........................................................................................ 10
Applying Cavity Wax:....................................................................................... 11
Applying Undercoating: ................................................................................... 13

 IMPORTANT
There are circumstances under which vehicles that are not currently registered or have never been
registered in a “salt belt” state may be eligible for this service campaign. These circumstances
include:
• Vehicles that were relocated into a “salt belt” area and/or
• Vehicles registered in a “non-salt belt” state and driven in a “salt belt” area
If it is determined that an owner of a vehicle within the affected VIN production date range
relocates or has operated their vehicle in a “salt belt” area, the dealer should perform this
procedure at no cost to the customer. The dealer must submit a Prior Approval request before
starting repairs.

Parts Information:

! DANGER
•
•
•

This procedure must be performed in a well-ventilated area.
Must wear safety goggles, face protection, and gloves. Rinse eyes with water or skin
with soap and water. Do not inhale spray. Seek medical attention if needed.
Flammable & pressurized. Do not spray near flames, sparks, or heated areas. Do not
pierce can.
Part Name
Cavity Wax

Image / Part Number

Remark
Use about half a can per vehicle.

00232-19034

TSB #: 23-01-058H

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SUBJECT:UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

Use about 1 can per vehicle.
Undercoat Spray
00232-19035
Set air pressure to 70 psi.
Wax Spray Gun
00232-19036

If wax output is slow, prime the
gun by blocking the nozzle with a
rag, and spraying the gun until the
flow of wax increases.
This is a newly developed nozzle
that has an improved wax
application spray pattern.

“Inside” Nozzle

The pink tubing is to signal the user
to stop spraying when pulling the
nozzle out.
09624-2H101-QQH
“Outside” Nozzle

TSB #: 23-01-058H

This nozzle must be used for this
service procedure.
This nozzle is supplied with the wax
gun.

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SUBJECT: UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

Recommended Tools and Equipment:
Tool Name

Image

Remark

Air Nozzle

Safety Goggles

Face Mask

Gloves

Rubber/Plastic Mallet
Wire Brush
Bags large enough to cover the tires
and wheels.

Plastic bags

Tape
*Above are standard shop supply.

TSB #: 23-01-058H

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SUBJECT:UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

Warranty Information:
Model
Op Code

Description

Op Time

Causal Part

Nature

Cause

UNDER BODY RUST
INSPECTION AND
0.8
62400-1R000
A12
ZZ6
PREVENTIVE SERVICE
NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type.
NOTE 2: Each labor operation will reimburse 1 can of undercoat spray and cavity wax.
NOTE 3: If a part that is not covered by this campaign is found in need of replacement while
performing the service campaign and the affected part is still under warranty, submit a separate claim
using the same repair order. If the affected part is out of warranty, submit a Prior Approval request for
goodwill consideration prior to the repair.
NOTE 4: This TSB includes Repair validation photos. Op times include VIN, Mileage and Repair
validation photos as outlined in the Digital Documentation Policy.
Accent (RB)

30D061R0

Service Procedures:

STUI

This TSB includes Repair validation photos. Refer to the latest Warranty Digital Documentation
Policy for requirements.

Wax Gun Preparation:

! DANGER
•
•
•

1.

This procedure must be performed in a well-ventilated area.
Must wear safety goggles, face protection, and gloves. Rinse eyes with water or skin
with soap and water. Do not inhale spray. Seek medical attention if needed.
Flammable & pressurized. Do not spray near flames, sparks, or heated areas. Do not
pierce can.

Unscrew the nut to remove the compression
fitting from the nozzle assembly that originally
comes with the wax gun.

TSB #: 23-01-058H

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SUBJECT: UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

2.

Attach the compression fitting to the tubing on
the new nozzle assembly.

3.

Fill wax gun reservoir with cavity wax.
Prime the wax gun by spraying the wax into a
trash bag (or similar) until a light mist is visibly
coming out of the nozzle.

i

Information

Set air supply pressure to 70 psi.
Prime the wax spray gun to increase the flow
when the mist is no longer visible.
To optimize the priming process, cover the
nozzle with a rag and spray until the flow has
increased.

TSB #: 23-01-058H

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SUBJECT:UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

Remove Debris:

! WARNING
Must wear safety goggles and a face mask during this procedure to protect eyes and prevent
debris from being inhaled.
1.

Lift the vehicle on a hoist.
Apply a plastic vinyl sheet on the floor.
If equipped, remove plastic undercovers to gain
access to the front sub-frame, brake, and fuel
tubes.

2.

Lightly tap the vehicle underbody
components with a rubber or plastic mallet
to loosen and remove debris.

Front Underbody
• Front sub-frame (A)
• Front lower control arms (B)
Rear Underbody
• Rear coupled torsion beam axle (C)
(CTBA). If equipped, remove the
rear CTBA undercover (D).

TSB #: 23-01-058H

A

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SUBJECT: UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

B

D
C

3.

Use a wire brush to remove debris from:
• Front sub-frame
• Front lower arms
• Rear CTBA

TSB #: 23-01-058H

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SUBJECT:UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

4.

Clean the brake banjo bolt surfaces at all
four calipers and brake tube fasteners using
a wire brush.

5.

Remove the remaining debris by inserting
an air nozzle into the interior cavity of the
sub-frames, control arms, and rear CTBA.
Then blow air in multiple directions.
Use the marked areas as a guideline to
insert the nozzle. Additional access might
be possible to remove more debris.

Front Underbody
• Front sub-frame
• Front lower arms
There is no internal cavity in the front lower
arms. Blow air on the exterior surface to
remove remaining debris.

TSB #: 23-01-058H

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SUBJECT: UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

Rear Underbody
• Rear CTBA

Vehicle Preparation:
1.

Wrap the brakes with plastic bags to protect
them from overspray. Use tape to secure the
plastic in place. Leave the banjo fitting area
exposed as shown.

! CAUTION
•
•
2.

The brakes must be sufficiently cooled
before it is wrapped.
May cause burns and melt the plastic.

Wrap large plastic bags around the tires and
wheels to protect them from overspray. Use
tape to secure the plastic in place.

TSB #: 23-01-058H

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SUBJECT:UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

3.

Wrap the exhaust areas adjacent to the
front and rear sub-frames with plastic bags
to protect them from overspray. Use tape
to secure the plastic in place.

! CAUTION
•
•

The exhaust must be sufficiently cooled
before it is wrapped.
May cause burns and melt the plastic.

Applying Cavity Wax:

! DANGER
•
•
•

This procedure must be performed in a well-ventilated area.
Must wear safety goggles, face protection, and gloves. Rinse eyes with water or skin
with soap and water. Do not inhale spray. Seek medical attention if needed.
Flammable & pressurized. Do not spray near flames, sparks, or heated areas. Do not
pierce can.

Apply the cavity wax at each of the locations noted in the following steps.
Generally for coating interior surfaces, insert the “inside” nozzle as deeply as possible at each point of
entry. Spray the cavity wax while simultaneously rotating the nozzle, and slowly pulling the nozzle
out. Continue this rotating/pulling motion until the pink tubing is seen coming out of the hole. The
pink tubing indicates there is about 50mm of tubing left until the end of the nozzle. Stop spraying
when the pink tubing is seen.
Generally for coating exterior surfaces, use the “outside” nozzle, provided with the wax gun. Use this
nozzle if the inside nozzle is too large to access the internal cavity of the components.
1.

Use the marked areas as a guideline to
insert the cavity wax nozzle. Additional
access into the internal cavity of the
components might be possible.

TSB #: 23-01-058H

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Information

Wipe the excess wax off the exterior
surfaces of the components.

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SUBJECT: UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

Front Underbody
• Front sub-frame
Do NOT spray cavity wax in the front lower
control arms. There is no internal cavity.

Do NOT spray cavity wax

TSB #: 23-01-058H

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Rear Underbody
• Rear CTBA

Applying Undercoating:

! DANGER
•
•
•

This procedure must be performed in a well-ventilated area.
Must wear safety goggles, face protection, and gloves. Rinse eyes with water or skin
with soap and water. Do not inhale spray. Seek medical attention if needed.
Flammable & pressurized. Do not spray near flames, sparks, or heated areas. Do not
pierce can.

Spray the black undercoating on all exterior surfaces of the front and rear sub-frames, front lower
arms, rear upper arms, rear lower arms, rear trailing arms, front and rear brake caliper banjos, brake
tube brackets, and fuel & brake tubes. Refer to the following images.
1.
Front Sub-frame

Front Lower Control Arms

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SUBJECT: UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

Rear CTBA

2.

Banjo and brackets at each wheel position

Additional brake and fuel tube brackets and
connectors:
-

Brake tube 2-way connector (A)
Brake tube mounts (B)
Rear brake and fuel tubes within the area marked in (C)
Areas marked in the boxes next to (D)

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SUBJECT:UNDERBODY CORROSION PREVENTATIVE SERVICE (SERVICE CAMPAIGN 992)

3.

Remove all the plastic bags.

4.

STUI
Using STUI, take clear photos of the
following components after the undercoating
is applied with the last 6 digits of the VIN and
the date of repair on a piece of paper. See
examples shown to the right.
1.
2.
3.
4.

Front sub-frame
Left front lower control arm
Right front lower control arm
Rear CTBA

Front Sub-Frame

Upload all four (4) photos to STUI.

Photo of left and right lower
control arms required

Rear CTBA
5.

Reinstall the parts in the reverse order of
removal.

6.

The procedure is now complete.

TSB #: 23-01-058H

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