Check Reflection Power [09/2023 - ]: Procedure

CHECK FRONT SIDE RADAR SENSOR REFLECTION POWER

NOTE:

If body repairs have been performed at the radio wave transmission area of the front bumper cover, be sure to perform "Check Reflection Power".

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Bumper Rear Side	*b	Scribed Line
	Radio Wave Transmission Area	-	-

The radiation range of electromagnetic waves is a guide, so when this range is adjusted, a target adjustment and a reflection power check should be performed.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	180 mm (7.09 in.)	*b	63 mm (2.48 in.)
*c	256 mm (10.08 in.)	*d	62 mm (2.44 in.)
*e	189 mm (7.44 in.)	*f	255 mm (10.04 in.)
*g	109 mm (4.29 in.)	*h	81 mm (3.19 in.)
*j	59 mm (2.32 in.)	*k	380 mm (14.96 in.)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002	Radiation Range of Electromagnetic Waves	-	-

"Check Reflection Power" enables the reflection power to be checked after beam axis alignment in accordance with the following procedure.

HINT:

Since radio waves from the front side radar sensor pass through the front bumper cover, if body repairs have been performed at the radio wave transmission area, radio wave transmission may be attenuated.
Perform "Check Reflection Power" with and without the front bumper assembly installed to check the difference.

When performing the front side radar beam axis confirmation, move the vehicle to a place where the space shown in the illustration can be secured.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE:

Perform this inspection on level ground.
Make sure that there are no metal objects around the vehicle or on the ground.
Unload the vehicle before beginning the inspection.
Confirm that the tire pressure is correct before beginning the inspection.
Refer to PROCEDURE - Step 1
Do not place any objects other than the reflector (such as a large metallic object) in the inspection area or allow people to enter the inspection area (W 6 m [19.68 ft.] x L 6 m [19.68 ft.] x H 3 m [9.84 ft.]) shown in the illustration.

Place the reflector.

except Sport Package:

Hang a weight with a pointed tip from the center of the rear bumper (center between the reflex reflector assemblies), and mark the rear center point of the vehicle (point A) on the ground.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	String	*b	Weight
*c	Center	*d	Bilateral Symmetry
*e	Edge of Reflex Reflector Assembly	-	-

HINT:

Lightly flick the string with your fingers several times to confirm that the string is aligned with mark A.

for Sport Package:

Hang a weight with a pointed tip from the center of the rear bumper (center between the reflex reflector assemblies), and mark the rear center point of the vehicle (point A) on the ground.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	String	*b	Weight
*c	Center	*d	Bilateral Symmetry
*e	Edge of Reflex Reflector Assembly	-	-

HINT:

Lightly flick the string with your fingers several times to confirm that the string is aligned with mark A.

Hang a weight with a pointed tip from the center of the No. 2 radiator grille garnish, and mark the front center point of the vehicle (point A) on the ground (placement position).

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	String	*b	Weight
*c	Center	*d	Bilateral Symmetry

HINT:

Lightly flick the string with your fingers several times to confirm that the string is perpendicular to the ground.

When using a laser line marker:

NOTE:

Do not look directly into the laser beam.

Press the laser mode button on the laser line marker to activate the laser line emitters.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Align the laser beam ground marking point (cross portion) with point B.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Ground Marking Point (Cross Portion)

Align the center of the target panel with point A, and set the target panel so that it faces forward.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Center Line

Target Panel

Adjust the position of the laser line marker so that the laser beam is aligned with the center line of the target panel.

Using a laser marker, create a vehicle center line that connects point A and point B.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Vehicle Center Line

When not using a laser line marker:

Draw a vehicle center line so that it passes through mark A and B (front and rear center points).

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Vehicle Center Line

Enlarge and print out the poster shown in the illustration.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Poster	*b	Edge of Front Bumper
*c	Line C	*d	Vehicle Center Line

Standard

Part	Angle
a	73.1°

Attach the printed poster to the floor with the vehicle center line aligned with point B as shown in the illustration.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Poster
*b	Vehicle Center Line

Align a piece of string with line C and mark point D at a distance of 3203 mm (10.51 ft.) from point B.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Vehicle Front
*b	Vehicle Center Line
*c	String
*d	Poster

Set the reflector at the point D shown in the illustration below.

SST: 09870-6000009870-60040
1. 09870-60010

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard

Part	Length
a	3203 mm (10.51 ft.)

NOTE:

Set the reflector so that its center is 760 mm (2.49 ft.) above the ground.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	SST (reflector)
*b	760 mm (2.49 ft.)

The center of the triangular pyramid is the reference point for the setting position and angle.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Center of Triangular Pyramid

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	SST (reflector)

Check reflection power.

Turn the ignition switch off.
Connect the GTS to the DLC3.
Turn the ignition switch ON and turn the front side radar system on.
Turn the GTS on.

Enter the following menus: Body Electrical / Front Side Radar "A" or Front Side Radar "B" / Utility / Front Side Radar "A" Beam Axis Display or Front Side Radar "B" Beam Axis Display.

HINT:

The "A" is on the LH side and the "B" is on the RH side.

Body Electrical > Front Side Radar "A" > Utility

Tester Display
Front Side Radar "A" Beam Axis Display

Body Electrical > Front Side Radar "B" > Utility

Tester Display
Front Side Radar "B" Beam Axis Display

Confirm the conditions displayed on the screen, and then press "Next" (*1).
Perform the procedure in accordance with the instructions on the screen.

Check the results displayed for the front side radar beam axis display.

ALLOWABLE RANGE

Item	Front Side Radar Sensor ("A")	Front Side Radar Sensor ("B")
Angle	-4.1 to +4.1°	-4.1 to +4.1°

HINT:

If the displayed results are outside the permissible range, the following are possible causes. Therefore, implement countermeasures, check the front side radar beam axis and perform the procedure again.

Possible Causes	Countermeasure
Incorrect SST (reflector) position	Check the position of SST (reflector) and checking space and perform the procedure again
A metallic object is located in the vicinity of the checking space	Check the position of SST (reflector) and checking space and perform the procedure again
The front side radar sensor installation is abnormal	Check the installation condition of the front side radar sensor Refer to ON-VEHICLE INSPECTION [09/2023 - ]

Enter the following menus: Body Electrical / Front Side Radar "A" or Front Side Radar "B" / Utility / Front Side Radar "A" Beam Axis Adjustment or Front Side Radar "B" Beam Axis Adjustment.

HINT:

The "A" is on the LH side and the "B" is on the RH side.

Body Electrical > Front Side Radar "A" > Utility

Tester Display
Front Side Radar "A" Beam Axis Adjustment

Body Electrical > Front Side Radar "B" > Utility

Tester Display
Front Side Radar "B" Beam Axis Adjustment

Confirm the conditions displayed on the screen, and then press "Next".
In accordance with the screen, perform Front Side Radar "A" Beam Axis Adjustment or Front Side Radar "B" Beam Axis Adjustment.
HINT:

When values on the axis display are in the allowable range, performing this adjustment compensates for any deviation from the normal value.
After front side radar beam axis adjustment is complete, note the value of "Reflector Reflection Power".
HINT:
- Do not move the reflector after removing the front bumper assembly, so that the process can be started again from "Front Side Radar Beam Axis Display" (*1).
- If the reflector is moved, variations in the measured values occur and the results cannot be accurately compared.
Remove the front bumper assembly.
1. except Sport Package:
  Refer to REMOVAL [09/2023 - ]
2. for Sport Package:
  Refer to REMOVAL [09/2023 - ]
Perform the procedure again from "Front Side Radar Beam Axis Display" (*1) and note the value of "Reflector Reflection Power".
Check the difference in value of "Reflector Reflection Power" with and without the front bumper assembly installed and confirm that the result is as specified.
HINT:
- Subtract the value with the front bumper assembly removed from the value with the front bumper assembly installed, and then check the result.
- If different reflectors are used with the front bumper assembly installed and removed, the measured values will vary and the correct difference cannot be determined.

Calculate the difference in reflection power.

HINT:

Formula: front bumper assembly installed - front bumper assembly removed

Standard

Item	Standard
Front Side Radar Sensor ("A")	-5.0 or higher
Front Side Radar Sensor ("B")	-5.0 or higher

HINT:

If the calculated value is -5.0 or higher, there is no problem.

*a	Calculated Value	-	-
	Outside Specified Range		Within Specified Range

If the difference in "Reflector Reflection Power" is outside of the specified range:

Suspect the following possible causes and perform the appropriate countermeasures:

Possible Causes	Countermeasure
When the front bumper cover panel was painted, too much paint base was applied Excessive addition of aluminum primary color	Strip the front bumper cover back to its base material, and then repaint
Operation of the front side radar sensor is abnormal	Replace the front side radar sensor

HINT:

If the result is outside of the specified range, it is suspected that body repair performed on the front bumper cover is reducing the reflection power.

After performing the appropriate countermeasures above, perform the operation again from "Front Side Radar Beam Axis Display"(*1) and confirm that "Reflector Reflection Power" is within the acceptable range.
HINT:

Refer to the body repair manual "INTRODUCTION > WORK NOTICES AND PRECAUTIONS > PRECAUTIONS FOR FRONT SIDE RADAR SENSOR".

Install the front bumper assembly.
1. except Sport Package:
  Refer to INSTALLATION [09/2023 - ]
2. for Sport Package:
  Refer to INSTALLATION [09/2023 - ]

After "Check Reflection Power" is completed, check "Radio Wave Irradiation Condition" of the millimeter wave radar sensor assembly.

HINT:

When performing the beam axis alignment, temporarily disable operation of the millimeter wave radar sensor assembly to prevent exposure to radio waves from the millimeter wave radar sensor assembly.

Enter the following menus: Body Electrical / Front Radar Sensor / Data List / Radio Wave Irradiation Condition.

Body Electrical > Front Radar Sensor > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Radio Wave Irradiation Condition	Status of radio wave irradiation	Under Radio Wave Irradiation or Under Radio Wave Stopping	Under Radio Wave Irradiation: Radio wave irradiation status displayed Under Radio Wave Stopping: Radio wave irradiation stopped status displayed	-

Body Electrical > Front Radar Sensor > Data List

Tester Display
Radio Wave Irradiation Condition

Standard

The value of the Data List item is displayed as "Under Radio Wave Irradiation".

When the value is "Under Radio Wave Stopping":

Enter the following menus: Body Electrical / Front Radar Sensor / Utility / Radio Wave Irradiation Stop Mode Cancellation.

Body Electrical > Front Radar Sensor > Utility

Tester Display
Radio Wave Irradiation Stop Mode Cancellation

After beam axis adjustment completes, clear the following system vehicle control history entries.
1. Clear vehicle control history (Front Side Radar Sensor System).
  Refer to VEHICLE CONTROL HISTORY (RoB) [09/2023 - ]
2. Clear vehicle control history (Front Camera System).
  Refer to VEHICLE CONTROL HISTORY (RoB) [09/2023 - 12/2023] , or refer to VEHICLE CONTROL HISTORY (RoB) [12/2023 - ]