Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000025DVF
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): ABS Operates Before Necessary When Braking; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

ABS Operates Before Necessary When Braking

DESCRIPTION

Troubleshooting for when ABS operates too soon due to a noisy signal from the speed sensor, a difference in output, etc.

PROCEDURE

1.

PERFORM DEALER MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CHECK)

(a) Using the GTS, perform a Dealer Mode (Signal Check) inspection sensor check and check that speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): TEST MODE PROCEDURE

Chassis > Brake/EPB > Utility

Tester Display

Signal Check

NOTICE:

  • When cleaning the front speed sensor and rear sped sensor (for AWD), make sure to clean the installation hole before installation.
  • Do not use parts cleaner when cleaning the front speed sensor rotor and rear speed sensor rotor (for AWD).

HINT:

The rear speed sensor and rear speed sensor rotor are incorporated into the rear axle hub and bearing assembly. (for 2WD)

If the rear speed sensor and rear speed sensor rotor need to be replaced, replace the rear axle hub and bearing assembly. (for 2WD)

OK:

Speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

Result

Proceed to

OK (for Front)

A

OK (for Rear, 2WD)

B

OK (for Rear, AWD)

C

NG

D
A

CLEAN FRONT SPEED SENSOR AND FRONT SPEED SENSOR ROTOR
B

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

C

CLEAN REAR SPEED SENSOR AND REAR SPEED SENSOR ROTOR
D

INSPECT AND REPAIR MALFUNCTIONING SPEED SENSOR CIRCUIT