Toyota Sienna Service Manual: Inspection
1. INSPECT OIL PUMP RELIEF VALVE
(a) Coat the relief valve with engine oil and check that it falls smoothly into the valve hole under its own weight.
If the valve does not fall smoothly, replace the relief valve. If necessary, replace the oil pump assembly.
2. INSPECT OIL PUMP ROTOR SET
(a) Install the rotors to the timing chain cover with the rotors' marks facing outward. Check that the rotors rotate smoothly.
(b) Check the tip clearance.
(1) Using a feeler gauge, measure the clearance between the drive and driven rotors, as shown in the illustration.
Tip clearance 
If the clearance is greater than the maximum, replace the drive and driven rotors.
(c) Check the side clearance.
(1) Using a feeler gauge and precision straightedge, measure the clearance between the rotors and precision straightedge, as shown in the illustration.
Side clearance 
If the side clearance is greater than the maximum, replace the timing chain cover.
(d) Check the body clearance.
(1) Using a feeler gauge, measure the clearance between the timing chain cover and driven rotor, as shown in the illustration.
Body clearance
If the body clearance is greater than the maximum, replace the timing chain cover.
Disassembly
1. REMOVE OIL PUMP RELIEF VALVE
(A) using a 27 mm socket wrench, remove the relief
valve plug.
(B) remove the valve spring and oil pump relief valve.
2. REMOVE OIL PUMP COVER
(a) Remove ...
Reassembly
1. INSTALL OIL PUMP COVER
(a) Coat the drive and driven rotors with engine oil and
place them into the timing chain cover with the
marks facing outward (oil pump cover side). Check
that the ro ...
Other materials:
Installation
1. Install speed sensor (nc sensor)
(a) Coat the O-ring with ATF.
(b) Install the speed sensor with the bolt.
Torque: 11 N*m (115 kgf*cm, 8 ft.*lbf)
HINT:
Make sure to install the same manufacturer's
sensor.
(c) Connect the speed sensor connector.
2. INSTALL SPEED SENSOR (NT SENSOR)
...
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
...
Installation
HINT:
Use the same procedures for the RH side and LH side.
The procedures listed below are for the LH side.
1. INSTALL REAR AIRBAG SENSOR LH
Check that the ignition switch is off.
Check that the battery negative (-) terminal is
disconnected.
CAUTION:
...
