Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001RPRX
Model Year Start: 2021 Model: Avalon HV Prod Date Range: [08/2020 - 08/2021]
Title: SEAT: FRONT SEAT ASSEMBLY: REMOVAL; 2021 MY Avalon Avalon HV [08/2020 - 08/2021]

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 front seat assembly removal/installation are shown below.

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

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link

*: When performing learning using the Techstream.

Click here 2019 - 2022 MY Avalon [04/2018 -        ]; PARK ASSIST / MONITORING: INTELLIGENT CLEARANCE SONAR SYSTEM (for Gasoline Model): CALIBRATION

Disconnect cable from negative auxiliary battery terminal

Perform steering sensor zero point calibration

Lane departure alert system (w/ Steering Control)

2019 - 2021 MY Avalon [04/2018 - 08/2021]; PRE-COLLISION: PRE-COLLISION SYSTEM (for Gasoline Model): INITIALIZATION

Pre-collision system

Intelligent clearance sonar system*

Lighting system (for Gasoline Model with Cornering Light)

Memorize steering angle neutral point

Parking assist monitor system

2019 - 2022 MY Avalon [04/2018 -        ]; PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM (for Gasoline Model): INITIALIZATION

Panoramic view monitor system

2019 - 2022 MY Avalon [04/2018 -        ]; PARK ASSIST / MONITORING: PANORAMIC VIEW MONITOR SYSTEM (for Gasoline Model): INITIALIZATION

  • Occupant detection ECU
  • Front passenger seat

Zero point calibration (Occupant classification system)

  • Occupant classification system
  • Passenger airbag ON/OFF indicator
  • Airbag system (Front passenger side)
  • Seat belt warning system (Front passenger)

2019 - 2022 MY Avalon [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM (for Gasoline Model): INITIALIZATION

  • Separate type front seat cushion spring assembly LH
  • Front seatback frame sub-assembly LH
  • Position control ECU assembly

Initialize position control ECU

Front power seat control system

2019 - 2022 MY Avalon [04/2018 -        ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for Gasoline Model with Memory): REGISTRATION

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

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link

*: When performing learning using the Techstream.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; PARK ASSIST / MONITORING: INTELLIGENT CLEARANCE SONAR SYSTEM (for HV Model): CALIBRATION

Disconnect cable from negative auxiliary battery terminal

Perform steering sensor zero point calibration

Lane departure alert system (w/ Steering Control)

2019 - 2021 MY Avalon HV [04/2018 - 08/2021]; PRE-COLLISION: PRE-COLLISION SYSTEM (for HV Model): INITIALIZATION

Pre-collision system

Intelligent clearance sonar system*

Lighting system (for HV Model with Cornering Light)

Memorize steering angle neutral point

Parking assist monitor system

2019 - 2022 MY Avalon HV [04/2018 -        ]; PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM(for HV Model): INITIALIZATION

Panoramic view monitor system

2019 - 2022 MY Avalon HV [04/2018 -        ]; PARK ASSIST / MONITORING: PANORAMIC VIEW MONITOR SYSTEM (for HV Model): INITIALIZATION

  • Occupant detection ECU
  • Front passenger seat

Zero point calibration (Occupant classification system)

  • Occupant classification system
  • Passenger airbag ON/OFF indicator
  • Airbag system (Front passenger side)
  • Seat belt warning system (Front passenger)

2019 - 2022 MY Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM (for HV Model): INITIALIZATION

  • Separate type front seat cushion spring assembly LH
  • Front seatback frame sub-assembly LH
  • Position control ECU assembly

Initialize position control ECU

Front Power Seat Control System

2019 - 2022 MY Avalon HV [04/2018 -        ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): REGISTRATION

CAUTION:

  • Be sure to read Precaution thoroughly before servicing.

    for Gasoline Model: Click here 2021 - 2022 MY Avalon [08/2020 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for Gasoline Model): PRECAUTION

    for HV Model: Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for HV Model): PRECAUTION

  • Wear protective gloves. Sharp areas on the parts may injure your hands.

NOTICE:

If the front seat airbag assembly has been deployed, replace the front seat airbag assembly, front seatback frame sub-assembly, separate type front seatback pad and separate type front seatback cover with the necessary parts in accordance with the extent of the collision damage.

HINT:

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

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the engine switch (for Gasoline Model) or power switch (for HV Model) off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

2. REMOVE LUGGAGE TRIM SERVICE HOLE COVER (for HV Model)

Click here 2020 - 2021 MY Avalon HV [08/2019 - 08/2021]; MAINTENANCE: A25A-FXS AUXILIARY BATTERY: REMOVAL+

3. REMOVE FRONT SEAT HEADREST ASSEMBLY

(a) Remove the front seat headrest assembly from the front seat assembly.

4. REMOVE FRONT OUTER SEAT TRACK BRACKET COVER

(a) Operate the slide and vertical power seat switch knob and move the front seat assembly to the rearmost position.

(b) Disengage the claw and guide to remove the front outer seat track bracket cover as shown in the illustration.

Remove in this Direction

5. REMOVE FRONT INNER SEAT TRACK BRACKET COVER

(a) Disengage the claw and guide to remove the front inner seat track bracket cover as shown in the illustration.

Remove in this Direction

6. REMOVE REAR OUTER SEAT TRACK BRACKET COVER

(a) Operate the slide and vertical power seat switch knob and move the front seat assembly to the foremost position.

(b) Disengage the claw and guide to remove the rear outer seat track bracket cover as shown in the illustration.

Remove in this Direction

7. REMOVE REAR INNER SEAT TRACK BRACKET COVER

(a) Disengage the claw and guide to remove the rear inner seat track bracket cover as shown in the illustration.

Remove in this Direction

8. REMOVE FRONT SEAT ASSEMBLY

(a) Using a T50 "TORX" socket wrench, remove the 2 bolts on the rear side of the front seat assembly.

(b) Operate the slide and vertical power seat switch knob and move the front seat assembly to the rearmost position.

(c) Using a T50 "TORX" socket wrench, remove the 2 bolts on the front side of the front seat assembly.

(d) Operate the reclining power seat switch knob and move the seatback to the upright position.

(e) Operate the slide and vertical power seat switch knob and move the front seat assembly to the center position.

(f) Operate the slide and vertical power seat switch knob and move the front seat assembly to the uppermost position.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

for 2GR-FKS: Click here 2019 - 2021 MY Avalon [04/2018 - 08/2021]; MAINTENANCE: 2GR-FKS BATTERY: REMOVAL+

for A25A-FXS: Click here 2020 - 2021 MY Avalon HV [08/2019 - 08/2021]; MAINTENANCE: A25A-FXS AUXILIARY BATTERY: REMOVAL+

for A25A-FKS: Click here 2021 - 2022 MY Avalon [08/2020 -        ]; MAINTENANCE: A25A-FKS BATTERY: REMOVAL+

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

Click here 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

(h) Disconnect the front seat airbag assembly connector under the front seat assembly.

NOTICE:

When disconnecting any airbag connector, take care not to damage the airbag wire harness.

(1) Push down the white housing lock and slide the yellow CPA. (At this time, the connector cannot be disconnected yet.)

*a

White Housing Lock

*b

Yellow CPA

Slide

(2) Push down the white housing lock again and disconnect the connector.

NOTICE:

Do not push down the part (A) shown in the illustration when disconnecting the connector.

(i) Disconnect each connector and disengage each clamp under the front seat assembly.

(j) Remove the front seat assembly.

NOTICE:

Be careful not to damage the vehicle body.