Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Noise Occurs from V-ribbed Belt or Generator Assembly

PROCEDURE

(a) Confirm the problem symptom.

B

GO TO STEP 6

A

(a) Check the V-ribbed belt for wear or damage.

OK:

The V-ribbed belt is not worn or damaged.

NG

REPLACE V-RIBBED BELT

OK

(a) Check the generator pulley with clutch grooves for wear or damage.

OK:

The generator pulley with clutch grooves are not worn or damaged.

NG

REPLACE GENERATOR PULLEY WITH CLUTCH

OK

(a) Start the engine and check the generator pulley with clutch for looseness.

OK:

The generator pulley with clutch is not loose.

NG

TIGHTEN GENERATOR PULLEY WITH CLUTCH TO SPECIFIED TORQUE

OK

(a) Remove the generator assembly.

Generator assembly (for 150 A Type): Click here

Generator assembly (for 180 A Type): Click here

(b) Check the installation condition of the generator pulley cap.

OK:

The generator pulley cap is not loose or missing.

(c) Check for forming of particles due to friction (for dry type pulley) or grease leaks (for wet type pulley).

OK:

There are no large amounts of particles (for dry type pulley) or grease leaks (for wet type pulley).

(d) Check the generator pulley with clutch for misalignment (interference with the generator assembly).

OK:

The generator pulley with clutch is not misaligned (no interference with the generator assembly).

(e) Turn the generator pulley with clutch clockwise and counterclockwise by hand and check for noise. OK: Noise does not occur when turned in either direction.

(f) Turn the generator pulley with clutch clockwise and counterclockwise by hand and visually check for runout.

OK:

The generator pulley with clutch does not have runout.

(g) Hold the generator rotor assembly (fan) in the generator assembly with a screwdriver with its tip wrapped with protective tape, and check that the generator pulley with clutch locks when turned clockwise and turns freely when turned counterclockwise. OK: The generator pulley with clutch locks when turned clockwise and turns freely when turned counterclockwise.

*a Protective Tape

OK

INSPECT PULLEY OTHER THAN GENERATOR ASSEMBLY PULLEY

NG

REPLACE GENERATOR PULLEY WITH CLUTCH

(a) Perform a road test and check that noise does not occur when decelerating.

OK:

Noise does not occur.

(b) Stop the engine and check that generator pulley with clutch noise does not occur as the engine stops.

OK:

Noise does not occur.

NG

REPLACE GENERATOR PULLEY WITH CLUTCH

OK

(a) Remove the generator assembly.

Generator assembly (for 150 A Type): Click here

Generator assembly (for 180 A Type): Click here

(b) Hold the generator rotor assembly (fan) in the generator assembly with a screwdriver with its tip wrapped with protective tape, and check that the generator pulley with clutch locks when turned from counterclockwise (free turning direction) to clockwise (locking direction).

OK:

The generator pulley with clutch locks.

OK

REPAIR OR REPLACE GENERATOR ASSEMBLY

NG

REPLACE GENERATOR PULLEY WITH CLUTCH