TECHNICAL INSTRUCTIONS
FOR

SPECIAL SERVICE CAMPAIGN K0B

MILLIMETER WAVE RADAR SENSOR

CERTAIN:
2018 – 2019 TACOMA
2018 – 2019 TUNDRA

The repair quality of covered vehicles is extremely important to Toyota. All dealership technicians performing
this recall are required to successfully complete the most current version of the E-Learning course “Safety
Recall and Service Campaign Essentials”. To ensure that all vehicles have the repair performed correctly;
technicians performing this recall repair are required to currently hold at least one of the following certification
levels:

• Certified Technician (any specialty)
• Expert Technician (any specialty)
• Master Technician
• Master Diagnostic Technician
It is the dealership’s responsibility to select technicians with the above certification level or greater to
perform this recall repair. Carefully review your resources, the technician skill level, and ability before
assigning technicians to this repair. It is important to consider technician days off and vacation
schedules to ensure there are properly trained technicians available to perform this repair at all times.

I.

OPERATION FLOW CHART
Verify Vehicle Eligibility

1. Check the TIS Vehicle Inquiry System

..Not Covered..

No further action required

Covered

Perform Health Check. Are there DTC s
related to the Pre-Collision System
(i.e. C1A10, U0235, U1104, etc.)?

Follow the diagnostic procedure in the Repair
Manual for these DTC s to determine if
replacement of MWRS is needed.

..Yes..

No

Identify repair type by
radiator grill design

Remove the MWRS from the
radiator grill

..Repair B..

Repair A
Is replacement of the MWRS required
as a result of the DTC diagnosis?

Is replacement of the MWRS required
as a result of DTC diagnosis?

Yes
Yes

Replace the MWRS

Replace MWRS sensor

No
Does the NEW MWRS have breather
holes on the back cover?

Does the NEW MWRS have breather
holes on the back cover?
Yes

No

No

No
Yes

Apply large sheet of EPT-Sealer
to the grill and NEW MWRS

Apply large sheet of EPT-Sealer
to the grill and original MWRS

Perform adjustment of MWRS

Perform Health Check and identify
if a Calibration update is available for
the Pre-Collision 2 System

Apply the small pad of EPT-Sealer
to the MWRS

Install the MWRS into the
radiator grill

Perform adjustment of MWRS

..No update available..

Update Available
Update the Pre-Collision 2
System Calibration ID

Perform Verification Health Check

Campaign completed, return
the vehicle to the customer

MWRS = Millimeter Wave Radar Sensor (located behind the Toyota emblem in the radiator grille)
EPT-Sealer = A foam pad that is used to seal against water and dirt.
2

II. IDENTIFICATION OF AFFECTED VEHICLES
•
•

Check the TIS Vehicle Inquiry System to confirm the VIN is involved in this Campaign, and
that it has not already been completed prior to dealer shipment or by another dealer.
TMNA warranty will not reimburse dealers for repairs completed on vehicles that are not
affected or were completed by another dealer.

III. PREPARATION
A.

PARTS

Repair A:
Part Number

Part Description

Quantity

88278-0C010

Cushion, Skid control Computer
(EPT Sealer Repair A: 75 mm x 150 mm, t = 5 mm)

1

Part Description

Quantity

Repair B:
Part Number

88278-0C020

Cushion, Skid control Computer
(EPT Sealer Repair B: 46 mm x 32 mm, t = 3 mm)

1

Part Detail:

Repair B:

Recommended temperature for adhesion is 50° F and above.
Keep stock at room temperature.
3

B.

TOOLS & EQUIPMENT
•
•

C.

Techstream
GR8 Battery Station

•
•

Standard Hand Tools
Nitrile Gloves

•

Torque Wrench

MATERIALS
•

General Purpose Cleaner

IV. BACKGROUND
The involved vehicles are equipped with a Pre-Collision System (PCS) that may automatically
apply the brakes if the system detects a potential collision. Due to the mounting of one of the
system’s sensors, it is possible for water to enter the sensor. This can lead to PCS deactivation
or inadvertent brake activation resulting in limited deceleration for a short duration of time.

4

V. CHECK FOR PRE-COLLISION SYSTEM DTC’S
1. CHECK FOR DTC’S
a. Using a Techstream, perform a Health Check.
b. Are there any DTC’s relating the Pre-Collision system (i.e.
C1A10, U0235, U1104) as reported by any system?
Note: This Service Campaign covers the application of the EPTSealer and Calibration ID update for the Pre-Collision 2 System,
as detailed in these instructions. It will also cover the
replacement cost of the Millimeter Wave Radar Sensor (MWRS),
when necessary. It does not cover the diagnosis or replacement
of any other parts on the vehicle.

Are there DTC s
related to the Pre-Collision System
(i.e. C1A10, U0235, U1104, etc.)?

YES

Proceed to Section VI.
Diagnosis of Pre-Collision
System DTC s on p. 5

No

Proceed to Section VII. Identify
MWRS Repair Method on p. 6

VI. DIAGNOSE OF PRE-COLLISION SYSTEM DTC’S
1. DETERMINE THE CAUSE OF PRE-COLLISION SYSTEM DTC’S
a. Use the appropriate Repair Manual procedure to determine the cause of the Pre-Collision
System DTC’s.

YES

Does the Repair Manual indicate that
replacement of the MWRS is necessary?

Replace the MWRS

No

Determine the correct actions of
repair outside of this campaign

Note: Because there are multiple reasons that could cause Pre-Collision system failures, it’s
critical to diagnose the system to determine the source of the trouble. This campaign will only
cover the replacement of the Millimeter Wave Radar Sensor, which is located behind the Toyota
emblem of the radiator grill. If the diagnostic process identifies that the DTC’s are caused by
something other than the Millimeter Wave Radar Sensor, this campaign will not cover the cost
associated with the repair.

5

VII. IDENTIFY MWRS REPAIR METHOD (A or B)
1. DETERMINE THE REPAIR METHOD FOR THIS VEHICLE
a. Use the following chart, reference the trim level of each vehicle to determine which repair
method to use.

Determine Repair Method by
Radiator grill type

Tacoma

Tundra

OR

OR

Tacoma
Repair A

Tacoma
Repair B

Tundra
Repair A

Tundra
Repair B

Proceed to Section
VIII. on p. 7

Proceed to Section
IX. on p. 11

Proceed to Section
X. on p. 17

Proceed to Section
XI. on p. 21

6

VIII.

TACOMA - REPAIR A
TACOMA - Repair A vehicles will have radiator grills of these designs:

1. REMOVE RADIATOR GRILL
a. Disconnect the electrical connector.
b. Disengage the clamp.

c. Apply protective tape around the radiator grille.

d. Remove the 2 screws.
e. Remove the 2 clips.
f. Disengage the 10 guides to remove the grille.

7

2. DETERMINE IF A NEW MWRS IS REQUIRED

YES

Was there a DTC that required
MWRS replacement?

No

Replace the MWRS

Use the original MWRS

Proceed to Step #3 Replace
MWRS

Proceed to Step #5 Prepare
the MWRS for EPT-Sealer
application on p. 9

3. REPLACE MWRS (only if required)
a. Remove the 2 bolts and screw.
b. Remove the original MWRS.
c. Install the NEW MWRS by engaging the 2 guides of the
grille into the guide holes of the MWRS.
d. Install the 2 bolts and screw.
Torque: 2.5 N∙m (25 kgf∙cm, 22 in.lbs)

4. DETERMINE IF EPT-SEALER IS NECESSARY FOR NEW SENSOR

Does the NEW MWRS have vent
holes on the back cover?

.NO.

EPT-Sealer will be
necessary. Proceed to
Step #5. on p. 9

.Yes.

EPT-Sealer WILL NOT be
necessary. Proceed to
Step #7 on p. 9

8

5. PREPARE THE MWRS FOR EPT-SEALER APPLICATION
a. Place a blanket onto the table or workbench.
b. Place the radiator grille onto the blanket, front side down.
c. Using general purpose cleaner and a clean towel, clean the back side of the MWRS
sensor and the emblem area on the back side of the grille.

6. APPLY EPT-SEALER
Note: This application will use P/N 88278-0C010. (75mm x 150mm x 5mm)

Video: Tacoma Repair A EPT-Sealer Installation
a. Apply the EPT Sealer to the back side of the MWRS in the position shown below:
•
•

Start applying the EPT Sealer sheet to the horizontal lip of the radiator grill to
create a waterproof shield over the top of the sensor.
Using heavy finger pressure, thoroughly press the entire surface of the EPT sealer
to securely adhere it to all contact surfaces of the MWRS.

Recommended temperature for adhesion is 50° F and above.
Keep stock at room temperature.
7. REINSTALL RADIATOR GRILLE
a. Engage the 10 guides to install the radiator grille.
b. Install the 2 clips.
c. Install the 2 screws.
d. Remove the protective tape.
e. Engage the clamp.
f. Connect the electrical connector.

9

8. DETERMINE IF MWRS ADJUSTMENT IS NECESSARY

YES

Was the MWRS replaced with a
NEW sensor?

Proceed to Step #8 ADJUST
NEW MWRS on p. 10

No

Proceed to Section XII.
DETERMINE CALIBRATION
STATUS on p. 27

9. ADJUST NEW MWRS (only if required)
a. Follow the Repair Manual procedure to complete the adjustment of the NEW MWRS.
CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT
(RM1000000018991)

Proceed to DETERMINE CALIBRATION STATUS on p. 27

10

IX. TACOMA - REPAIR B
TACOMA Repair B vehicles will have a radiator grill of this design:

1. REMOVE RADIATOR GRILL
a. Disconnect the electrical connector.
b. Disengage the clamp.

c. Apply protective tape to the bumper around the radiator
grille.

d. Remove the 2 screws.
e. Remove the 2 clips.
f. Disengage the 10 guides by pulling the grille forward to
disengage the remaining clips.

11

2. REMOVE MWRS FROM THE GRILLE
e. Place a blanket onto a table or workbench.
f. Place the radiator grille onto the blanket, front die down.
g. Disconnect the electrical connector.

h. Remove the 2 bolts and screw.
i. Disengage the 2 guides and remove the MWRS from the
grill.

3. DETERMINE IF A NEW MWRS IS REQUIRED

YES

Was there a DTC that required
MWRS replacement?

No

Replace the MWRS

Use the original MWRS

Proceed to Step #4 Determine if
EPT-Sealer is Necessary for
NEW Sensor on p. 13

Proceed to Step #5 Apply EPTSealer to MWRS p. 13

12

4. DETERMINE IF EPT-SEALER IS NECESSARY FOR NEW SENSOR

Does the NEW MWRS have vent
holes on the back cover?

.NO.

EPT-Sealer will be
necessary. Proceed to
Step #5. on p. 13

.Yes.

EPT-Sealer WILL NOT be
necessary. Proceed to
Step #9 on p. 16

5. APPLY EPT-SEALER TO MWRS
Note: This application will use P/N 88278-0C020. (46mm x 32mm x 5mm)

The EPT-Sealer will be applied in a specific way, using the following points for orientation. Please
note the arrangement of corners A, B, C, D.

Video: EPT Sealer Installation Repair B

Recommended temperature for adhesion is 50° F and above.
Keep stock at room temperature.

13

6. CLEAN THE APPLICATION AREA
a. Using general purpose cleaner, remove all traces of
dust, dirt, and oils or grease from the application
area (indicated within the red circle). Be careful not
to get any liquids into the 2 vent holes.
Note: The MWRS housing has been painted white in
these photos to provide more contrast in the pictures.
The actual MWRS housings will be black.

Left Side

7. APPLY THE EPT SEALER
a. Wear Nitrile Gloves to prevent adhesive
contamination.
b. Apply the EPT-Sealer to the left side of the MWRS
to the following standard:
• Left Side View: Corner “A” of the EPTSealer should be placed at the inner corner
of the MWRS as indicated.
• Top View: Place the EPT-Sealer on the
surface of the side vent hole (it is ok to cover
the side vent hole). DO NOT place the EPT
Sealer on top of the ridge, as indicated with
the yellow X’s.
Note: A diagram of the EPT sealer can be found on
page 14.

c. Press the EPT sealer firmly into place in this area to
seat it thoroughly. Use a flathead screw driver or
trim tool if necessary to reach the corner.
Top View

14

d. Roll the EPT-Sealer Corner “B” onto the top edge of
the MWRS sensor as shown, aligning it’s edge
with the end of the metal bracket. Be sure to
keep the EPT-Sealer off the upper ridge.
e. Press the EPT sealer firmly into place in this area to
seat it thoroughly.

f. Bend the lower flap (Corner “C”) onto the face of the
MWRS and align the edge with the edge of the
upper flap and metal bracket.
g. Press the EPT-Sealer into the face of the MWRS to
seat it firmly. DO NOT press in the area indicated
as it’s critical there is an air gap for the vent.
ONLY PRESS THE EPT-SEALER ONTO THE
UPPER FACE OF THE MWRS. DO NOT
press the EPT sealer into the vent hole.
It’s critical that the vent hole remains open.

15

h. Roll Corner “D” downward from the top, aligning the
edge with the edge of the lower section and metal
bracket.
i. Press the EPT sealer into place, being careful to
leave an airgap above the rear vent hole.

8. INSPECT THE EPT-SEALER APPLICATION
a. Verify that all the contact points of the EPT sealer
are thoroughly applied.
b. Verify that the bottom is still open to properly
allow airflow to the rear vent hole.
Note: In case of failure during inspection, start over