Toyota Sienna Service Manual: Air Inlet Damper Position Sensor Circuit
DESCRIPTION
This sensor detects the position of the air inlet control servo motor and sends the appropriate signals to the A/C amplifier. The position sensor is built in the air inlet control servo motor.
The position sensor's resistance changes as the air inlet control servo motor arm moves.
It outputs voltage (5 V) that is input to terminal 1 and terminal 3 via the variable resistor, and then to the A/ C amplifier.
The A/C amplifier determines the arm position based on the input voltage from
the position sensor. 
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the intelligent tester main switch on.
(c) Select the items below in the DATA LIST, and read the display on the intelligent tester.
DATA LIST / AIR CONDITIONER 
OK: The display is as specified in the normal condition column.
Result 
2 INSPECT AIR INLET CONTROL SERVO MOTOR
(a) Remove the air inlet control servo motor.
(b) Disconnect the connector from the air inlet control servo motor.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance 
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance 
(e) As the air inlet control servo motor moves from RECIRCULATION to FRESH, the resistance decreases gradually without interruption.
3 CHECK HARNESS AND CONNECTOR (AIR INLET CONTROL SERVO MOTOR - A/C AMPLIFIER)
(a) Disconnect the connector from the A/C amplifier.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance
Standard resistance
Air Mix Damper Position Sensor Circuit (Passenger Side)
DESCRIPTION
This sensor detects the position of the air mix control servo motor (air mix
damper) and sends the
appropriate signals to the A/C amplifier. The position sensor is built in the
a ...
Air Outlet Damper Position Sensor Circuit
DESCRIPTION
This sensor detects the position of the air outlet control servo motor and
sends the appropriate signals to
the A/C amplifier. The position sensor is built in the air outlet contro ...
Other materials:
Unmatched Encryption Code
DTC B2794 Unmatched Encryption Code
DESCRIPTION
This DTC is output when a key with an incomplete key code is inserted into
the ignition key cylinder.
DTC No.
DTC Detection Condition
Trouble Area
B2794
Key with incomplete key code inserted
Key
IN ...
Horn
To sound the horn, press on or
close to the mark.
WARNINGCaution while driving
Do not adjust the steering wheel while driving.
Doing so may cause the driver to mishandle the vehicle and cause an
accident,
resulting in death or serious injury.
After adjusting the steeri ...
Front wiper rubber
COMPONENTS
REMOVAL
1. REMOVE FRONT WIPER BLADE
Remove the front wiper blade from the front wiper
arm LH.
NOTICE:
Do not fold down the front wiper arm with the
front wiper blade being removed from it.
2. REMOVE FRONT WIPER RUBBER
Remove the front wiper rubber from th ...
