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

(a) Check the zero point voltage of the yaw rate sensor.

(1) Keep the vehicle in a stationary condition on a level surface for 1 second or more.

(b) Check the output of the yaw rate sensor.

(1) Move the shift lever to the D position, drive the vehicle at a speed of approximately 3 mph (5 km/h), and turn the steering wheel either to the left or right 90° or more until the vehicle makes 180° turn.

(2) Stop the vehicle and move the shift lever to the position. Check that the skid control buzzer sounds for 3 seconds.

HINT:

• If the skid control buzzer sounds, the signal check is completed normally.
• If the skid control buzzer does not sound, check the skid control buzzer circuit, then perform the signal check again.
• If the skid control buzzer does not sound yet, there is a malfunction in the yaw rate sensor, so check the DTC.
• Make a 180° turn. At the end of the turn, the direction of the vehicle should be within 180 +- 5° of its start position.
• Do not spin the wheels.

11. DTC OF TEST MODE (SIGNAL CHECK) FUNCTION

ABS sensor:

VSC sensor:

HINT: The codes in this table are output only in Test Mode (signal check).

Problem symptoms table

Vehicle Stability Control System: