Toyota Avalon (XX50): Ultrasonic Sensor(for Rear)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Ultrasonic Sensor(for Rear)

Components

COMPONENTS

ILLUSTRATION

*1	REAR CENTER ULTRASONIC SENSOR	*2	REAR CENTER ULTRASONIC SENSOR RETAINER
*3	REAR CORNER ULTRASONIC SENSOR	*4	REAR CORNER ULTRASONIC SENSOR RETAINER
*5	ULTRASONIC SENSOR CLIP	-	-
●	Non-reusable part	-	-

Inspection

INSPECTION

PROCEDURE

1. INSPECT REAR CENTER ULTRASONIC SENSOR

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
4 (BI) - 6 (EI)	Always	10 kΩ or higher
4 (BI) - 1 (BO)	Always	Below 1 Ω
5 (SI) - 2 (SO)	Always	Below 30 Ω
6 (EI) - 3 (EO)	Always	Below 1 Ω

If the result is not as specified, replace the rear center ultrasonic sensor.

*a	Component without harness connected (Rear Center Ultrasonic Sensor)

2. INSPECT REAR CORNER ULTRASONIC SENSOR

(a) for RH Side:

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
4 (BI) - 6 (EI)	Always	10 kΩ or higher
4 (BI) - 1 (BO)	Always	Below 1 Ω
5 (SI) - 2 (SO)	Always	Below 30 Ω
6 (EI) - 3 (EO)	Always	Below 1 Ω

If the result is not as specified, replace the rear corner ultrasonic sensor RH.

*a	Component without harness connected (Rear Corner Ultrasonic Sensor RH)

(b) for LH Side:

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
4 (BI) - 6 (EI)	Always	10 kΩ or higher
4 (BI) - 1	Always	Below 1 Ω
5 (SI) - 2	Always	Below 30 Ω
6 (EI) - 3	Always	Below 1 Ω

If the result is not as specified, replace the rear corner ultrasonic sensor LH.

*a	Component without harness connected (Rear Corner Ultrasonic Sensor LH)

Installation

INSTALLATION

CAUTION / NOTICE / HINT

PROCEDURE

1. INSTALL REAR CORNER ULTRASONIC SENSOR RETAINER

HINT:

Perform this procedure only when replacement of the rear corner ultrasonic sensor retainer is necessary.
If a rear corner ultrasonic sensor retainer has been removed, replace it with a new one.
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

(a) Clean the surface of the rear bumper assembly.

(1) Remove any remaining double-sided tape from the rear bumper assembly.

(2) Wipe off any adhesive residue with cleaner.

(b) Cover the sensor installation hole with a 27 mm (1.06 in.) circular piece of tape.

*a	27 mm (1.06 in.)

NOTICE:

Use a clean brush or felt.
Do not touch the rear bumper assembly until the primer has dried.

Primer

(d) Confirm that the primer has completely dried by touching the rear bumper assembly. Then remove the tape.

(e) Peel off the release paper from a new rear corner ultrasonic sensor retainer.

(f) Align the rear corner ultrasonic sensor retainer with the mark on the rear bumper assembly and install it as shown in the illustration.

NOTICE:

Ensure that the rear corner ultrasonic sensor retainer is within the scribed line.
The double-sided tape of a rear corner ultrasonic sensor retainer will deteriorate if it is detached. Make sure to replace the rear corner ultrasonic sensor retainer with a new one when reattachment is necessary.

HINT:

Press the area shown in the illustration with a force of 30 N (3.0 kgf) for 3 seconds to securely install the rear corner ultrasonic sensor retainer to the rear bumper assembly. Confirm there is no clearance between the rear corner ultrasonic sensor retainer and rear bumper assembly.

*a	Scribed Line
	Press area

2. INSTALL REAR CENTER ULTRASONIC SENSOR RETAINER

HINT:

Perform this procedure only when replacement of the rear center ultrasonic sensor retainer is necessary.
If a rear center ultrasonic sensor retainer has been removed, replace it with a new one. Install the rear center ultrasonic sensor with a new rear center ultrasonic sensor retainer as a set to the rear bumper assembly.
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

(a) Engage the 2 claws to install a new rear center ultrasonic sensor retainer to the rear center ultrasonic sensor.

(b) Clean the surface of the rear bumper assembly.

(1) Remove any remaining double-sided tape from the rear bumper assembly.

(2) Wipe off any adhesive residue with cleaner.

*a	19 mm (0.748 in.)

(d) Using a brush or felt, apply primer or equivalent to the rear center ultrasonic sensor retainer installation area.

NOTICE:

Use a clean brush or felt.
Do not touch the rear bumper assembly until the primer has dried.

Primer

(e) Confirm that the primer has completely dried by touching the rear bumper assembly. Then remove the tape.

(f) Peel off the release paper from the rear center ultrasonic sensor retainer.

(g) Align the rear center ultrasonic sensor retainer with rear center ultrasonic sensor with the mark on the rear bumper assembly and install it as shown in the illustration.

NOTICE:

Ensure that the sensor tip is correctly inserted into the sensor installation hole of the rear bumper assembly.
Ensure that the rear center ultrasonic sensor retainer is within the scribed line.
The double-sided tape of a rear center ultrasonic sensor retainer will deteriorate if it is detached. Make sure to replace the rear center ultrasonic sensor retainer with a new one when reattachment is necessary.

HINT:

Press the area shown in the illustration with a force of 30 N (3.0 kgf) for 3 seconds to securely install the rear center ultrasonic sensor retainer to the rear bumper assembly. Confirm there is no clearance between the rear center ultrasonic sensor retainer and rear bumper assembly.

*a	Scribed Line
	Press area

3. INSTALL ULTRASONIC SENSOR CLIP

HINT:

Perform this procedure only when replacement of the ultrasonic sensor clip is necessary.
Use the same procedure for all ultrasonic sensor clips.

(a) Engage the clamp to install the ultrasonic sensor clip to the wire.

4. INSTALL REAR CORNER ULTRASONIC SENSOR

HINT:

Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

(a) Engage the 2 claws to install the rear corner ultrasonic sensor as shown in the illustration.

Install in this Direction

(b) Connect the connector.

5. INSTALL REAR CENTER ULTRASONIC SENSOR

HINT:

Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

(a) When replacing only the rear center ultrasonic sensor:

(1) Engage the 2 claws to install the rear center ultrasonic sensor as shown in the illustration.

Install in this Direction

(b) Engage the 4 claws as shown in the illustration.

Install in this Direction

6. INSTALL REAR BUMPER ASSEMBLY

Click here

7. PERFORM CALIBRATION

for Gasoline Model: Click here

for HV Model: Click here

SST: 09989-00020

Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during ultrasonic sensor removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced (for Gasoline Model)

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function When Necessary Procedures are not Performed	Link
Rear bumper assembly Ultrasonic sensor	Measure ultrasonic sensor detection angle Ultrasonic sensor detection angle registration	Intelligent Clearance Sonar System Intuitive Parking Assist System

Necessary Procedure After Parts Removed/Installed/Replaced (for HV Model)

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function When Necessary Procedures are not Performed	Link
Rear bumper assembly Ultrasonic sensor	Measure ultrasonic sensor detection angle Ultrasonic sensor detection angle registration	Intelligent Clearance Sonar System Intuitive Parking Assist System

PROCEDURE

1. REMOVE REAR BUMPER ASSEMBLY

Click here

2. REMOVE REAR CENTER ULTRASONIC SENSOR

HINT:

Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

(a) Disconnect the connector.

Remove in this Direction

(b) Disengage the 4 claws as shown in the illustration.

Remove in this Direction

3. REMOVE REAR CORNER ULTRASONIC SENSOR

HINT:

Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

(a) Disconnect the connector.

(b) Disengage the 2 claws and remove the rear corner ultrasonic sensor as shown in the illustration.

Remove in this Direction

4. REMOVE ULTRASONIC SENSOR CLIP

HINT:

Perform this procedure only when replacement of the ultrasonic sensor clip is necessary.
Use the same procedure for all ultrasonic sensor clips.

(a) Disengage the clamp to remove the ultrasonic sensor clip from the wire.

5. REMOVE REAR CENTER ULTRASONIC SENSOR RETAINER

HINT:

Perform this procedure only when replacement of the rear center ultrasonic sensor retainer is necessary.
When removing the rear center ultrasonic sensor retainer, heat the rear bumper assembly and rear center ultrasonic sensor retainer using a heat light.
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

(a) Heat the rear bumper assembly and rear center ultrasonic sensor retainer using a heat light at the specified temperature for 3 to 5 minutes.

Heating Temperature:

Item	Temperature
Rear Bumper Assembly	40 to 60°C (104 to 140°F)
Rear Center Ultrasonic Sensor Retainer	40 to 60°C (104 to 140°F)

CAUTION:

Do not touch the heat light and heated parts.
Touching the heat light may result in burns.
Touching heated parts for a long time may result in burns.

*a	Heated Part
*b	Heat Light

(b) Remove the rear center ultrasonic sensor retainer.

6. REMOVE REAR CORNER ULTRASONIC SENSOR RETAINER

HINT:

Perform this procedure only when replacement of the rear corner ultrasonic sensor retainer is necessary.
When removing the rear corner ultrasonic sensor retainer, heat the rear bumper assembly and rear corner ultrasonic sensor retainer using a heat light.
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

(a) Heat the rear bumper assembly and rear corner ultrasonic sensor retainer using a heat light at the specified temperature for 3 to 5 minutes.

Heating Temperature:

Item	Temperature
Rear Bumper Assembly	40 to 60°C (104 to 140°F)
Rear Corner Ultrasonic Sensor Retainer	40 to 60°C (104 to 140°F)

CAUTION:

Do not touch the heat light and heated parts.
Touching the heat light may result in burns.
Touching heated parts for a long time may result in burns.

*a	Heated Part
*b	Heat Light

(b) Remove the rear corner ultrasonic sensor retainer.

Ultrasonic Sensor(for Front)

Telematics System(for Gasoline Model)

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