Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Inspection

Lexus RX (RX 350L, RX450h) 2016-2025 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)
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    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 ...

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