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

REMOVAL

CAUTION / NOTICE / HINT

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

*1: When performing learning using the Techstream.

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PROCEDURE

1. PRECAUTION

CAUTION:

Be sure to read Precaution thoroughly before servicing.

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NOTICE:

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

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2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CAUTION:

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

NOTICE:

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

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3. REMOVE LOWER NO. 3 STEERING WHEEL COVER

(a) Using a screwdriver with its tip wrapped with protective tape, disengage the claw and guide to remove the lower No. 3 steering wheel cover.

*a Protective Tape

4. REMOVE LOWER NO. 2 STEERING WHEEL COVER

(a) Using a screwdriver with its tip wrapped with protective tape, disengage the claw and guide to remove the lower No. 2 steering wheel cover.

*a Protective Tape

5. REMOVE HORN BUTTON ASSEMBLY

CAUTION:

When storing the horn button assembly, keep the airbag deployment side facing upward.

Deployment Side

(a) Check that the engine switch is off.

(b) Check that the cable is disconnected from the negative (-) battery terminal.

CAUTION:

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

(c) Using a screwdriver, push in the 3 torsion springs to disengage the 3 pins as shown in the illustration. NOTICE: Do not drop the horn button assembly. HINT: Insert the screwdriver from the installation holes for the lower No. 3 steering wheel cover and lower No. 2 steering wheel cover.

*a Torsion Spring

(d) Pull out the horn button assembly from the steering wheel assembly and hold the horn button assembly with one hand.

NOTICE:

When separating the horn button assembly, do not pull the airbag wire harness.

(e) Disconnect the horn connector from the horn button assembly.

*a Airbag Connector *b Horn Connector *c Airbag Connector Lock *d Protective Tape

(f) Using a screwdriver with its tip wrapped with protective tape, release the 2 airbag connector locks.

(g) Disconnect the 2 airbag connectors.

(h) Disengage the wire harness clamp to remove the horn button assembly

NOTICE:

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