Toyota Tundra Service 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

OK:

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

NOTICE:

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

CLEAN SPEED SENSOR AND SPEED SENSOR ROTOR

NG

INSPECT AND REPAIR MALFUNCTIONING SPEED SENSOR CIRCUIT

    ABS does not Operate

    ABS Warning Light does not Come ON

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