M20A-FKS (BATTERY / CHARGING): CHARGING SYSTEM: Noise Occurs from V-ribbed Belt or Generator Assembly; 2020 - 2022 MY Corolla Corolla Hatchback [03/2019

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001I3M1
Model Year Start: 2020	Model: Corolla Hatchback	Prod Date Range: [03/2019 - 09/2022]
Title: M20A-FKS (BATTERY / CHARGING): CHARGING SYSTEM: Noise Occurs from V-ribbed Belt or Generator Assembly; 2020 - 2022 MY Corolla Corolla Hatchback [03/2019 - 09/2022]

Noise Occurs from V-ribbed Belt or Generator Assembly

PROCEDURE

1.	CONFIRM PROBLEM SYMPTOM

(a) Confirm the problem symptom.

Symptom	Proceed to
Noise occurs from V-ribbed belt.	A
Noise occurs from generator assembly.	B

GO TO STEP 6

2.	CHECK V-RIBBED BELT FOR WEAR

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

OK:

The V-ribbed belt is not worn or damaged.

REPLACE V-RIBBED BELT

3.	CHECK GENERATOR PULLEY WITH CLUTCH FOR WEAR

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

OK:

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

REPLACE GENERATOR PULLEY WITH CLUTCH

for Transaxle M/T with Denso Made Generator: Click here

for Transaxle CVT with Denso Made Generator: Click here

for VALEO Made: Click here

4.	CHECK FOR NOISE WHILE CLUTCH PULLEY IS OPERATING

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

OK:

The generator pulley with clutch is not loose.

TIGHTEN GENERATOR PULLEY WITH CLUTCH TO SPECIFIED TORQUE

5.	INSPECT GENERATOR PULLEY WITH CLUTCH (UNIT INSPECTION)

(a) Remove the generator assembly.

for Transaxle M/T with Denso Made Generator: Click here

for Transaxle CVT with Denso Made Generator: Click here

for VALEO Made: Click here

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

OK:

The generator pulley cap is not loose or missing.

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) Inspect generator pulley with clutch.

for Transaxle M/T with Denso Made Generator: Click here

for Transaxle CVT with Denso Made Generator: Click here

for VALEO Made: Click here

INSPECT PULLEY OTHER THAN GENERATOR ASSEMBLY PULLEY

REPLACE GENERATOR PULLEY WITH CLUTCH

for Transaxle M/T with Denso Made Generator: Click here

for Transaxle CVT with Denso Made Generator: Click here

for VALEO Made: Click here

6.	CHECK FOR NOISE WHEN ROTOR IS TURNING FREELY

(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.

REPLACE GENERATOR PULLEY WITH CLUTCH

for Transaxle M/T with Denso Made Generator: Click here

for Transaxle CVT with Denso Made Generator: Click here

for VALEO Made: Click here

7.	CHECK ENGAGEMENT OF GENERATOR PULLEY WITH CLUTCH

(a) Inspect generator pulley with clutch.

for Transaxle M/T with Denso Made Generator: Click here

for Transaxle CVT with Denso Made Generator: Click here

for VALEO Made: Click here

REPAIR OR REPLACE GENERATOR ASSEMBLY

for Transaxle M/T with Denso Made Generator: Click here

for Transaxle CVT with Denso Made Generator: Click here

for VALEO Made: Click here

REPLACE GENERATOR PULLEY WITH CLUTCH

for Transaxle M/T with Denso Made Generator: Click here

for Transaxle CVT with Denso Made Generator: Click here

for VALEO Made: Click here