Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Inspection

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Vehicle Interior / Seat / Lumbar Support Adjuster Assembly / Inspection

INSPECTION

PROCEDURE

1. INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (w/ Seat Variable Cushion Switch)

(a) Check the operation of the lumbar support adjuster assembly LH.

(1) Check that the front seatback moves smoothly when the battery is connected to the lumbar support adjuster assembly LH (forward and backward operation) connector terminals.

OK:

Battery Connection

Operational Direction

Battery positive (+) → Terminal 1

Battery negative (-) → Terminal 2

Seatback moves forward

Battery positive (+) → Terminal 2

Battery negative (-) → Terminal 1

Seatback moves backward

If the result is not as specified, replace the lumbar support adjuster assembly LH.

*a

Component without harness connected

(Lumbar Support Adjuster Assembly LH)

(b) Check the operation of the lumbar support adjuster assembly LH.

(1) Check that the front seatback moves smoothly when the battery is connected to the lumbar support adjuster assembly LH (upward and downward operation) connector terminals.

OK:

Battery Connection

Operational Direction

Battery positive (+) → Terminal 1

Battery negative (-) → Terminal 2

Seatback moves upward

Battery positive (+) → Terminal 2

Battery negative (-) → Terminal 1

Seatback moves downward

If the result is not as specified, replace the lumbar support adjuster assembly LH.

*a

Component without harness connected

(Lumbar Support Adjuster Assembly LH)

2. INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (w/o Seat Variable Cushion Switch)

(a) Check the operation of the lumbar support adjuster assembly LH.

(1) Check that the front seatback moves smoothly when the battery is connected to the lumbar support adjuster assembly LH connector terminals.

OK:

Battery Connection

Operational Direction

Battery positive (+) → Terminal 1

Battery negative (-) → Terminal 2

Seatback moves forward

Battery positive (+) → Terminal 2

Battery negative (-) → Terminal 1

Seatback moves backward

If the result is not as specified, replace the lumbar support adjuster assembly LH.

*a

Component without harness connected

(Lumbar Support Adjuster Assembly LH)

3. INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY RH (w/ Seat Variable Cushion Switch)

(a) Check the operation of the lumbar support adjuster assembly RH.

(1) Check that the front seatback moves smoothly when the battery is connected to the lumbar support adjuster assembly RH (forward and backward operation) connector terminals.

OK:

Battery Connection

Operational Direction

Battery positive (+) → Terminal 1

Battery negative (-) → Terminal 2

Seatback moves forward

Battery positive (+) → Terminal 2

Battery negative (-) → Terminal 1

Seatback moves backward

If the result is not as specified, replace the lumbar support adjuster assembly RH.

*a

Component without harness connected

(Lumbar Support Adjuster Assembly RH)

(b) Check the operation of the lumbar support adjuster assembly RH.

(1) Check that the front seatback moves smoothly when the battery is connected to the lumbar support adjuster assembly RH (upward and downward operation) connector terminals.

OK:

Battery Connection

Operational Direction

Battery positive (+) → Terminal 1

Battery negative (-) → Terminal 2

Seatback moves upward

Battery positive (+) → Terminal 2

Battery negative (-) → Terminal 1

Seatback moves downward

If the result is not as specified, replace the lumbar support adjuster assembly RH.

*a

Component without harness connected

(Lumbar Support Adjuster Assembly RH)

4. INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY RH (w/o Seat Variable Cushion Switch)

(a) Check the operation of the lumbar support adjuster assembly RH.

(1) Check that the front seatback moves smoothly when the battery is connected to the lumbar support adjuster assembly RH connector terminals.

OK:

Battery Connection

Operational Direction

Battery positive (+) → Terminal 1

Battery negative (-) → Terminal 2

Seatback moves forward

Battery positive (+) → Terminal 2

Battery negative (-) → Terminal 1

Seatback moves backward

If the result is not as specified, replace the lumbar support adjuster assembly RH.

*a

Component without harness connected

(Lumbar Support Adjuster Assembly RH)
    Components
    COMPONENTS ILLUSTRATION *A for Standard Seat Type *B for Sports Seat Type *1 FRONT SEAT CUSHION SHIELD *2 FRONT SEAT INNER CUSHION SHIELD *3 INNER NO. 1 FRONT SEAT CUSHION SH ...

    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 lumb ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Lin Communication System: How To Proceed With Troubleshooting
    CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the LIN communication system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT: In troubleshooting, confirm that the problem s ...

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Air Conditioning Amplifier: 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 air conditioning amplifier removal/installation are shown below. Necessary Procedure After Parts Remove ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2026 Copyright www.lexusrx.net
    0.0153