T-SB-0088-21

October 4, 2021

Millimeter Wave Radar Sensor - Floor Slope
Compensation
Service
Category

ADAS/AD

Section

Advanced Driver Assistance System

Market USA

Applicability
YEAR(S)

MODEL(S)

2013 - 2015

Avalon, Avalon HV, Land
Cruiser

2015 - 2018

Camry, Camry HV

2014 - 2016

Highlander, Highlander HV

2016 - 2018

Mirai

2012 - 2015

Prius PHV

2012 - 2017

Prius V

2010 - 2015

Prius

2011 - 2017

Sienna

ADDITIONAL INFORMATION

Introduction

For proper calibration of the millimeter wave radar sensor, the vehicle and radar target must be on
a level surface with a consistent plane. If a level surface with a consistent plane is not available,
use the Floor Slope Compensation Procedure in this service bulletin in conjunction with the
appropriate model and model year Repair Manual instructions when adjusting the millimeter wave
radar sensor.

© 2021 Toyota Motor Sales, USA

Page 1 of 9

T-SB-0088-21

October 4, 2021

Page 2 of 9

Millimeter Wave Radar Sensor - Floor Slope Compensation
Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

N/A

Not Applicable to Warranty

–

–

–

–

Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)

PART NUMBER

QTY

Laser Level*

01816-00103

1

Tri-pod*

01816-00104

1

Attachment A*

09989-00010-01, 09989-00010-L

1

Digital Angle Gauge*

01815-00102

1

*Essential SST.

NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.

REQUIRED TOOLS & MATERIAL

QUANTITY

Tape Measure

1

© 2021 Toyota Motor Sales, USA

T-SB-0088-21

October 4, 2021

Page 3 of 9

Millimeter Wave Radar Sensor - Floor Slope Compensation
Floor Slope Compensation Procedure

1. Prepare the vehicle for calibration.
A. Park the vehicle where the calibration will be performed.
B. Check the tire pressures and adjust as necessary.
C. Remove ALL excess weight from the vehicle (heavy objects, luggage, etc.).
2. Determine the floor slope and set the
vertical angle of the millimeter wave
radar sensor.

Figure 1.
1

2

3

NOTE
Refer to the instruction video link:
Floor Slope Measurement and Millimeter
Wave Radar Sensor Vertical Angle
Calibration Procedure.

3. Install the laser level onto the tri-pod.
A. Install the tri-pod head attachment onto
the base of the laser level.
B. Engage the tri-pod head attachment
onto the tri-pod and lock it in position.
NOTE
Refer to the instruction video link:
3 Line Chalk Line (Automatic Laser Level)
SST: 01816-001003 Operation Overview.

4

3

5
7

6

6
8

1

Upward Slope

2

Downward Slope

3

Vehicle Front

4

Floor

5

Short

6

Long

7

Front

8

Rear

© 2021 Toyota Motor Sales, USA

7

5

4
8

T-SB-0088-21

October 4, 2021

Page 4 of 9

Millimeter Wave Radar Sensor - Floor Slope Compensation
Floor Slope Compensation Procedure (continued)

4. Measure the floor slope on BOTH sides of
the vehicle.

Figure 2.

A. Place the tri-pod and laser
approximately 6 ft. away from the side
of the vehicle.

1

2

B. Level the tri-pod base and head using
the built-in bubble levels.

3

C. Turn the laser ON and ensure that the
laser switch is placed in the unlocked
position so it can automatically level.

1

Vehicle Front

2

Self-leveling Laser

3

Center of the Wheel

D. Measure the distance from the floor to the laser line at the vertical center of the front wheel
as shown and record the value.
NOTE
Measure using inches or millimeters.
Figure 3.

E. Measure the distance from the floor to the laser line at the vertical center of the rear wheel
and record the value.

F. Repeat steps 4A – 4E for the opposite side.

© 2021 Toyota Motor Sales, USA

T-SB-0088-21

October 4, 2021

Page 5 of 9

Millimeter Wave Radar Sensor - Floor Slope Compensation
Floor Slope Compensation Procedure (continued)

5. Calculate the vertical angle for the millimeter wave radar sensor.
A. Open the Slope Calculator, select the appropriate vehicle from the dropdown, and enter
the measured values at each wheel in the correct locations.
NOTE
 Ensure the correct measurement value (inches or millimeters) is selected prior to calculating.
 Figure 4 should be used ONLY as a reference, you MUST click on the link to access the
Slope Calculator.

B. Press the finalize button and then press calculate.
C. The slope calculation sheet will calculate the required vertical angle and reflector height
adjustment based on the floor slope. Record these readings.
Figure 4.

© 2021 Toyota Motor Sales, USA

T-SB-0088-21

October 4, 2021

Page 6 of 9

Millimeter Wave Radar Sensor - Floor Slope Compensation
Floor Slope Compensation Procedure (continued)

6. Set the vertical angle of the millimeter wave radar sensor.
A. Clean the top of the radar sensor surface and Attachment A and remove ANY dust
and/or debris.
B. Place Attachment A (short or long
depending on available clearance) on
top of the radar sensor calibration
surface as shown.

Figure 5.

1

1

C. Place the digital angle gauge on
Attachment A with the screen facing
the passenger side of the vehicle and
retrieve the sensor angle.

Calibration Surface

Figure 6. Digital Angle Gauge

NOTE
 The Digital Angle Gauge is directional
and MUST be placed with the screen
facing the passenger side of the
vehicle for the up/down indicator to
properly display the angle of the radar
sensor. The tool indicates a positive or
negative angle based on the right side
of the tool’s vertical location.
 Once the digital angle gauge has been
powered on, the unit must be set to
Absolute Mode, ABS will be displayed
in the upper right corner of the display.
 Refer to the instruction video link:
Digital Angle Gauge SST 01815-00102
Operation Overview.

1

1

© 2021 Toyota Motor Sales, USA

ABS Is Displayed

T-SB-0088-21

October 4, 2021

Page 7 of 9

Millimeter Wave Radar Sensor - Floor Slope Compensation
Floor Slope Compensation Procedure (continued)

D. Adjust the radar vertical angle to the
value calculated on the slope
calculation sheet.

Figure 7.
1

NOTE
When adjusting the vertical angle ensure
you pay attention to the up/down
indicators on both the slope calculation
sheet AND the digital angle gauge.

1

Bolt A

7. Set the target placement and perform
sensor calibration.
A. Locate and mark the center line of
the vehicle.

Figure 8.

1

B. Locate the reflector calibration position.

2

3

4

1

Mark Centerline

2

Electronic Tape Measure

3

5 m (16.4 ft.)

4

Millimeter Wave Radar Sensor Position

© 2021 Toyota Motor Sales, USA

T-SB-0088-21

October 4, 2021

Page 8 of 9

Millimeter Wave Radar Sensor - Floor Slope Compensation
Floor Slope Compensation Procedure (continued)

C. Set the reflector height.
NOTE
Refer to the instruction video link:
Reflector C Placement and Height Adjustment Procedure.

(1) Place the tri-pod and laser level in front of the vehicle.
(2) Level the tri-pod base and head using the built-in bubble levels.
(3) Turn ON the laser level to the unlocked position with both the vertical AND horizontal
laser lines being projected.
(4) Adjust the height of the tri-pod head
and laser until the laser line crosses
the center of the front emblem
as shown.

Figure 9.

NOTE
The laser switch MUST be in the
unlocked position so it can
automatically self-level. If the laser
light is flashing this indicates that the
laser is NOT leveled or is in the
locked position.

1

1

© 2021 Toyota Motor Sales, USA

Millimeter Waver Radar Sensor Assembly

T-SB-0088-21

October 4, 2021

Page 9 of 9

Millimeter Wave Radar Sensor - Floor Slope Compensation
Floor Slope Compensation Procedure (continued)

(5) Turn the self-leveling laser 180°
and toward the reflector stand.

Figure 10.
1

NOTE
Do NOT change the height of the
laser level or tripod when performing
this step.
2

(6) Adjust the height of the reflector
until the center aligns with the laser
lines as shown.

1

Turn the Self-leveling Laser 180°

2

Do Not Change the Height

Figure 11.

1

1

(7) Adjust the height of the reflector up
or down in accordance with the
slope calculation sheet value.

Self-leveling Laser

Figure 12. Upward Slope Example

2

1

3

4

1

Value Shown in the Slope Calculation Sheet.

2

Reflector Height

3

0.2°

4

5 m (16.4 ft.)

8. Perform a beam axis adjustment of the millimeter wave radar sensor.
© 2021 Toyota Motor Sales, USA