Toyota RAV4 manuals

Toyota Sienna Service Manual: Air Mix Damper Position Sensor Circuit (Passenger Side)

DESCRIPTION

Air Mix Damper Position Sensor Circuit (Passenger Side)

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 air mix control servo motor. The position sensor's resistance changes as the air mix 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

Air Mix Damper Position Sensor Circuit (Passenger Side)

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 MIX CONTROL SERVO MOTOR

INSPECT AIR MIX CONTROL SERVO MOTOR

(a) Remove the air mix control servo motor.

(b) Disconnect the connector from the air mix 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

INSPECT AIR MIX CONTROL SERVO MOTOR

(e) As the air mix control servo motor moves from the cool side to the hot side, the resistance decreases gradually without interruption.

3 CHECK HARNESS AND CONNECTOR (AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER)

CHECK HARNESS AND CONNECTOR (AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER)

(a) Disconnect the connector from the A/C amplifier.

CHECK HARNESS AND CONNECTOR (AIR MIX CONTROL SERVO MOTOR - A/C AMPLIFIER)

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance

REPLACE A/C AMPLIFIER

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