Toyota 2005 Sienna Owner's Manual page 516

J Operation Requirements
y16058q
Even if these requirements are met, the system may not
operate properly under certain conditions such as bad
weather. See "Owner's Manual" for details.
SIENNA (QRG_U)
Cruising from about 45 km/h (28 mph) to about 135 km/h (85 mph)
The wipers are not operating at all or operating
intermittently (including the same wiper operation
in the "AUTO" position).
The selector lever is in the "D" position.
− 2 −
See Owner's Manual for Complete Information.
2005 SIENNA QRG from Sep. '04 Prod. (OM45430U)