Toyota Sienna Service Manual: On-vehicle inspection
1. CHECK AUTO SLIDE-OPEN / CLOSE FUNCTION
- Check that the sliding roof switch can operate the
sliding roof glass as follows while the tilt-up / DOWN
function is not operating.
Standard

HINT:
The sliding roof stops partway when the sliding roof
switch is pushed on either side during AUTO
operation.
2. CHECK AUTO TILT UP / DOWN FUNCTION
- Check that the sliding roof switch can operate the
sliding roof as follows while the slide-OPEN /
CLOSE function is not operating:
Standard

HINT:
The sliding roof stops partway when the sliding roof
switch is pushed on either side during AUTO
operation.
3. CHECK SLIDING ROOF OPERATION FUNCTION
AFTER IGNITION IS TURNED OFF
- When both of the following conditions are fulfilled,
check that the power windows, the back door glass
and the roof can be operated even after the ignition
switch is turned OFF:
- Within 43 seconds after the ignition switch is
turned OFF.
- Either of the front doors is opened.
4. CHECK DEFLECTOR OPERATION
- Check that the sliding roof automatically tilts UP /
DOWN depending on the vehicle speed.
- Conditions that enable the sliding roof to
automatically tilt DOWN:
- Sliding roof in fully open position
- Sliding roof in UP position
- Vehicle speed 70 km/h (43 mph) or less
(during acceleration)
- Conditions that enable the sliding roof to
automatically tilt UP:
- Sliding roof in fully open position
- Sliding roof in DOWN position
- Vehicle speed 65 km/h (40 mph) or less
(during deceleration)
- Move the sliding roof into the fully open position
from any position except the fully open position
while the vehicle is driving in the vehicle speed of 85
km/h (53 mph) or more. Then operate the sliding
roof switch on the TILT UP side. At this time, check
that the sliding roof does not tilt UP.
5. CHECK JAM PROTECTION FUNCTION
HINT:
The jam protection function prevents any part of your
body from getting caught by accident between the
vehicle body and the roof glass during sliding roof
operation.
Operative condition:
- AUTO CLOSE
- AUTO CLOSE during sliding roof operation after the
ignition switch is turned OFF.
- AUTO TILT-DOWN
- AUTO TILT-DOWN during sliding roof operation after
the ignition switch is turned OFF.
CAUTION:
- Do not check this function using a part of your
body such as your hand. Also, pay thorough
attention that nothing gets caught by accident in
this process.
- If checking this function with something thin (less
than 5 mm (0.20 in.)) inserted between the roof
glass and vehicle body, this function may not
operate.

- When the slide-OPEN / CLOSE function is
operating:
Check that the sliding roof opens by approximately
200 mm (7.87 in.) right when something gets caught
between the vehicle body and the roof glass during
sliding roof operation.

- When the tilt-UP / DOWN function is operating:
Check that the sliding roof tilts up fully when
something gets caught between the vehicle body
and the roof glass during sliding roof operation.
6. CHECK FAIL-SAFE FUNCTION
- If the sliding roof does not close because the jam
protection function operates improperly, press the
sliding roof switch on the TILT UP side and hold it
until the sliding roof glass is fully tilted up. (It goes
down a little after it is fully tilted up) Then, you can
manually close the sliding roof.
7. CHECK SLIDING ROOF DRIVER GEAR SUBASSEMBLY

- Disconnect the drive gear wire harness connector.
- Check the resistance or voltage between the
terminals of the wire harness side connector.
Standard

If the result is not as specified, the drive gear subassembly
(sliding roof ECU) may have a
malfunction.

- Reconnect the drive gear wire harness connector.
- Reset the sliding roof position (See page RF-2).
- Check the voltage of the terminals of the wire
harness side connector
Standard

If the result is not as specified, the drive gear
assembly (sliding roof ECU) may have a
malfunction.
SLIDING ROOF SYSTEM
Symptom
Suspected area
AUTO function does not operate
Sliding roof motor assembly
Sliding roof system does not operate
ECU-IG fu ...
Other materials:
Diagnostic trouble code chart
1. DTCS FOR OCCUPANT CLASSIFICATION SYSTEM
If a trouble code is displayed during the DTC check,
check the circuit listed for the code in the table below
(proceed to the page listed for that circuit).
HINT:
When DTC B1150/23 is detected as a result of
troubleshooting for the airbag system, pe ...
Poor Sound Quality in All Modes (Low Volume)
INSPECTION PROCEDURE
1 CHECK AUDIO SETTINGS
Set "BASS", "MID" and "TREB" to the initial values and
check that sound is normal.
OK:
Malfunction disappears.
2 COMPARE WITH ANOTHER VEHICLE OF SAME MODEL
Compare with another vehicle of the same model.
...
Improper Aiming of Radar Sensor Beam Axis
DTC P1572 Improper Aiming of Radar Sensor Beam Axis
DESCRIPTION
This DTC is output when the scanning angle of the laser sensor is incorrect.
This DTC is also output when
the laser sensor beam axis is determined to be in an incorrect position.
DTC No.
DTC Detection Condition
...