Toyota Sienna Service Manual: On-vehicle inspection
1. INSPECT STEERING PAD (VEHICLE NOT INVOLVED IN COLLISION)

- Perform a diagnostic system check.
- With the steering pad installed on the vehicle,
perform a visual check. If there are any defects as
mentioned below, replace the steering pad with a
new one:
Cuts, minute cracks or marked discoloration on the
steering pad top surface or in the grooved portion.
2. INSPECT STEERING PAD (VEHICLE INVOLVED IN COLLISION AND AIRBAG HAS NOT
DEPLOYED)

- Perform a diagnostic system check.
- With the steering pad removed from the vehicle,
perform a visual check. If there are any defects as
mentioned below, replace the steering pad or
steering wheel assembly with a new one:
- Cuts, minute cracks or marked discoloration on
the steering pad top surface or in the grooved
portion.
- Cracks or other damage to the connectors.
- Deformation of the steering wheel assembly.
- Deformation of the horn button contact plate of
the steering pad.
- There should be no interference between the
steering pad and steering wheel assembly, and
the clearance should be uniform all the way
around when the new steering pad is installed on
the steering wheel assembly.
CAUTION:
Be sure to follow the correct removal and
installation procedures.
1. PRECAUTION
CAUTION: Be sure to read "PRECAUTION" thoroughly before
servicing.
2. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
CAUTION:
Wait for 90 seconds after disconnecting th ...
Other materials:
Terminals of ECU
1. CENTER AIRBAG SENSOR ASSEMBLY (w/ Side
Airbag)
2. CENTER AIRBAG SENSOR ASSEMBLY (w/o Side
Airbag)
...
Adjustment procedure
Second seat
Tip-up seat (7-passenger models)
Seat position adjustment
lever
Seatback angle adjustment
lever
Tip-up seat (8-passenger models)
Seat position adjustment
lever
Seatback angle adjustment
lever
Ottoman seat
Seat position adjustment
...
Stop light switch
ON-VEHICLE INSPECTION
1. STOP LIGHT SWITCH ASSEMBLY
Check the resistance between the terminals at each
switch position as shown ion the chart.
Resistance
...