SEAT: FRONT SEAT ASSEMBLY: INSPECTION; 2019 - 2022 MY Avalon Avalon HV [04/2018

Last Modified: 09-10-2025	6.11:8.1.0	Doc ID: RM100000001A9Y0
Model Year Start: 2019	Model: Avalon	Prod Date Range: [04/2018 - ]
Title: SEAT: FRONT SEAT ASSEMBLY: INSPECTION; 2019 - 2022 MY Avalon Avalon HV [04/2018 - ]

INSPECTION

PROCEDURE

1. INSPECT FRONT SEAT ADJUSTER ASSEMBLY LH

(a) Check the operation of the slide motor.

(1) Check that the seat cushion moves smoothly when the auxiliary battery is connected to the slide motor connector terminals.

OK:

Auxiliary Battery Connection

Operational Direction

Auxiliary battery positive (+) → Terminal 4

Auxiliary battery negative (-) → Terminal 3

Seat cushion moves forward

Auxiliary battery positive (+) → Terminal 3

Auxiliary battery negative (-) → Terminal 4

Seat cushion moves backward

If the result is not as specified, replace the front seat adjuster assembly LH.

*a	Component without harness connected (Slide Motor (Front Seat Adjuster Assembly LH))

(b) Check the operation of the front vertical motor.

(1) Check that the seat cushion moves smoothly when the auxiliary battery is connected to the front vertical motor connector terminals.

OK:

Auxiliary Battery Connection

Operational Direction

Auxiliary battery positive (+) → Terminal 3

Auxiliary battery negative (-) → Terminal 1

Seat cushion moves upward

Auxiliary battery positive (+) → Terminal 1

Auxiliary battery negative (-) → Terminal 3

Seat cushion moves downward

If the result is not as specified, replace the front seat adjuster assembly LH.

*a	Component without harness connected (Front Vertical Motor (Front Seat Adjuster Assembly LH))

(1) Check that the seat cushion moves smoothly when the auxiliary battery is connected to the lifter motor connector terminals.

OK:

Auxiliary Battery Connection

Operational Direction

Auxiliary battery positive (+) → Terminal 3

Auxiliary battery negative (-) → Terminal 1

Seat cushion moves upward

Auxiliary battery positive (+) → Terminal 1

Auxiliary battery negative (-) → Terminal 3

Seat cushion moves downward

If the result is not as specified, replace the front seat adjuster assembly LH.

*a	Component without harness connected (Lifter Motor (Front Seat Adjuster Assembly LH))

2. INSPECT FRONT SEATBACK FRAME SUB-ASSEMBLY LH

(a) Check the operation of the reclining motor.

(1) Check that the seatback moves smoothly when the auxiliary battery is connected to the reclining motor connector terminals.

OK:

Auxiliary Battery Connection

Operational Direction

Auxiliary battery positive (+) → Terminal 3

Auxiliary battery negative (-) → Terminal 1

Seatback moves forward

Auxiliary battery positive (+) → Terminal 1

Auxiliary battery negative (-) → Terminal 3

Seatback moves backward

If the result is not as specified, replace the front seatback frame sub-assembly LH.

*a	Component without harness connected (Reclining Motor (Front Seatback Frame Sub-assembly LH))

3. INSPECT FRONT SEAT ADJUSTER ASSEMBLY RH

(a) Check the operation of the slide motor.

(1) Check that the seat cushion moves smoothly when the auxiliary battery is connected to the slide motor connector terminals.

OK:

Auxiliary Battery Connection

Operational Direction

Auxiliary battery positive (+) → Terminal 3

Auxiliary battery negative (-) → Terminal 4

Seat cushion moves forward

Auxiliary battery positive (+) → Terminal 4

Auxiliary battery negative (-) → Terminal 3

Seat cushion moves backward

If the result is not as specified, replace the front seat adjuster assembly RH.

*a	Component without harness connected (Slide Motor (Front Seat Adjuster Assembly RH))

(b) Check the operation of the front vertical motor.

(1) Check that the seat cushion moves smoothly when the auxiliary battery is connected to the front vertical motor connector terminals.

OK:

Auxiliary Battery Connection

Operational Direction

Auxiliary battery positive (+) → Terminal 1

Auxiliary battery negative (-) → Terminal 3

Seat cushion moves upward

Auxiliary battery positive (+) → Terminal 3

Auxiliary battery negative (-) → Terminal 1

Seat cushion moves downward

If the result is not as specified, replace the front seat adjuster assembly RH.

*a	Component without harness connected (Front Vertical Motor (Front Seat Adjuster Assembly RH))

(1) Check that the seat cushion moves smoothly when the auxiliary battery is connected to the lifter motor connector terminals.

OK:

Auxiliary Battery Connection

Operational Direction

Auxiliary battery positive (+) → Terminal 3

Auxiliary battery negative (-) → Terminal 1

Seat cushion moves upward

Auxiliary battery positive (+) → Terminal 1

Auxiliary battery negative (-) → Terminal 3

Seat cushion moves downward

If the result is not as specified, replace the front seat adjuster assembly RH.

*a	Component without harness connected (Lifter Motor (Front Seat Adjuster Assembly RH))

4. INSPECT FRONT SEATBACK FRAME SUB-ASSEMBLY RH

(a) Check the operation of the reclining motor.

(1) Check that the seatback moves smoothly when the auxiliary battery is connected to the reclining motor connector terminals.

OK:

Auxiliary Battery Connection

Operational Direction

Auxiliary battery positive (+) → Terminal 3

Auxiliary battery negative (-) → Terminal 1

Seatback moves forward

Auxiliary battery positive (+) → Terminal 1

Auxiliary battery negative (-) → Terminal 3

Seatback moves backward

If the result is not as specified, replace the front seatback frame sub-assembly RH.

*a	Component without harness connected (Reclining Motor (Front Seatback Frame Sub-assembly RH))