Toyota Avalon Service & Repair Manual: 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 TEST MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CIRCUIT)

(a) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Utility / Signal Check.

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

Click here

Chassis > ABS/VSC/TRAC/EPB > Utility

Tester Display

Signal Check

OK:

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

Result

Proceed to

OK (for Front)

A

OK (for Rear)

B

NG

C

NOTICE:

  • When cleaning the front speed sensor, make sure to clean the installation hole before installation.
  • Do not use parts cleaner when cleaning the front speed sensor rotor.

HINT:

The rear speed sensor and rear speed sensor rotor are incorporated into the rear axle hub and bearing assembly.

If the rear speed sensor and rear speed sensor rotor need to be replaced, replace the rear axle hub and bearing assembly.

A

CLEAN FRONT SPEED SENSOR AND FRONT SPEED SENSOR ROTOR

B

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

C

INSPECT AND REPAIR MALFUNCTIONING SPEED SENSOR CIRCUIT

    Electronically Controlled Brake System(for Gasoline Model)

    ABS Warning Light does not Come ON

    See More:

    Toyota Avalon Service & Repair Manual > Steering Gear(for Hv Model): Disassembly
    DISASSEMBLY PROCEDURE 1. REMOVE STEERING RACK BOOT CLIP (for LH Side) (a) Using pliers, remove the steering rack boot clip. 2. REMOVE STEERING RACK BOOT CLIP (for RH Side) HINT: Perform the same procedure as for the LH side. 3. REMOVE NO. 2 STEERING RACK BOOT CLAMP (for LH Side) (a) Using a screwdri ...

    Toyota Avalon Owners Manual

    Toyota Avalon Service & Repair Manual

    © 2024 Copyright www.tavalon.net
    0.0126