Toyota Sienna Service Manual: Inspection
1. Inspect generator clutch pulley
(a) Hold the center of the pulley, and confirm that the outer ring turns counterclockwise and does not turn clockwise.
If the result is not as specified, replace the clutch pulley.
2. Remove generator drive end frame bearing
(a) Check that the bearing is not rough or worn.V
Ok: the bearing rotates smoothly.
If the bearing does not rotate smoothly, replace the bearing.
3. Inspect generator brush holder assembly
(a) Using vernier calipers, measure the length of the exposed brushes.
Standard exposed length: 9.5 to 11.5 mm (0.374 to 0.453 in.) Minimum exposed length: 4.5 mm (0.177 in.) If the exposed length is less than the minimum, replace the brush holder assembly.
4. INSPECT GENERATOR ROTOR ASSEMBLY
(a) Check that the generator rotor bearing is not rough or worn.
If necessary, replace the generator rotor assembly.
(b) Check the generator rotor for an open circuit.
(1) Using an ohmmeter, measure the resistance between the slip rings.
Standard resistance
If the result is not as specified, replace the generator rotor assembly.
(c) Check the rotor for a short to ground.
(1) Using an ohmmeter, measure the resistance between the slip ring and rotor.
Standard resistance 
If the result is not as specified, replace the generator rotor assembly.
(d) Using vernier calipers, measure the slip ring diameter.
Standard diameter: 14.2 to 14.4 mm (0.559 to 0.567 in.) Minimum diameter: 14.0 mm (0.551 in.)
If the diameter is less than the minimum, replace the generator rotor assembly.
Disassembly
1. REMOVE GENERATOR CLUTCH PULLEY
(A) using a screwdriver, remove the generator pulley
cap.
(b) Set SST (A) and (B).
SST 09820-63020
(c) Clamp SST (A) in a vise.
NOTICE:
...
Replacement
1. REPLACE GENERATOR DRIVE END FRAME BEARING
(a) Remove the 4 screws and retainer plate from the
drive end frame.
(b) Using SST and a hammer, tap out the drive end
frame bearing from the d ...
Other materials:
Sleep Operation Failure of Occupant Classification
ECU
DTC B1796 Sleep Operation Failure of Occupant Classification
ECU
DESCRIPTION
During sleep mode, the occupant classification ECU reads the condition of
each sensor while the ignition
switch is off.
In this mode, if the occupant classification ECU detects an internal
malfunction, DTC B1796 ...
Vehicle Speed Sensor "A"
DTC P0500 Vehicle Speed Sensor "A"
DESCRIPTION
The speed sensor detects the wheel speed and sends the appropriate signals to
the skid control ECU.
The skid control ECU converts these wheel speed signals into a 4-pulse signal
and outputs it to the ECM
via the combination meter. Th ...
No. 1 Ultrasonic sensor
COMPONENTS
REMOVAL
1. REMOVE FRONT FENDER LINER LH
2. REMOVE FRONT FENDER LINER RH
3. REMOVE FRONT BUMPER COVER
4. REMOVE REAR BUMPER COVER (2)
5. REMOVE NO. 1 ULTRASONIC SENSOR RETAINER
Remove the No. 1 ultrasonic sensor retainer as
shown in the illustration
6. REMOVE ...
