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:
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 goe ...
Terminals of ecu
1. Terminal of ECU
(*1): Models with dynamic laser cruise control
(*2): 2WD model
2. Terminal Inspection
(a) Disconnect the connector and measure the voltage
or resistance on the wire harness ...
Other materials:
Read vin (vehicle identification number)
(a) The VIN reading process is shown in the flowchart
below. Reading the VIN stored in the ECM is
necessary when comparing it to the VIN provided
with the vehicle.
(b) Read the VIN using the intelligent tester.
(c) Check the vehicle's VIN.
(d) Connect the intelligent tester to the DLC3.
...
Removal
1. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
2. REMOVE ENGINE UNDER COVER NO.1
3. DRAIN AUTOMATIC TRANSAXLE FLUID
(a) Remove the drain plug and gasket, and drain the
ATF.
(b) Install a new gasket and the drain plug.
Torque: 49 N*m (500 kgf*cm, 36 ft.*lbf)
4. REMOVE AUTOMATIC TRANSA ...
Adjustment
HINT:
If the malfunction does not disappear by following the
procedure in ADJUSTMENT and the rear No. 2 seat
assembly needs to be replaced, do not disassemble the rear
No. 2 seat assembly.
1. ADJUST FRONT LEG
HINT:
Perform the following procedure if the inner leg does not
lock.
P ...
