Toyota Sienna Service Manual: Speed sensor check (when using sst check wire)

(a) Check the speed sensor signal.

(1) Drive the vehicle straight forward. Drive the vehicle at a speed of 45 km/h (28 mph) or higher for several seconds and check that the ABS warning light goes off.

HINT: The signal check may not be completed if the vehicle has its wheels spun or the steering wheel turned during this check.

(b) Stop the vehicle.

NOTICE:

• Before performing the speed sensor signal check, complete the deceleration sensor and master cylinder pressure sensor checks.
• The speed sensor signal check may not be completed if the speed sensor signal check is started while turning the steering wheel or spinning the wheels.
• After the ABS warning light goes off, if vehicle speed exceeds 80 km/h (50 mph), a signal check code will be stored again.

  Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).

• If the signal check has not been completed, the ABS warning light blinks while driving and the ABS system does not operate.

HINT: When the signal check has been completed, the ABS warning light goes off while driving and blinks in the test mode pattern while stationary.