Toyota Sienna Service Manual: Air Inlet Damper Control Servo Motor Circuit

DESCRIPTION

The air inlet control servo motor is controlled by the A/C amplifier and moved to the desired position.

The air inlet control servo motor switches the air inlet mode by rotating (normal, reverse) with electrical power from the A/C amplifier. This controls intake air and changes the mode between "RECIRCULATION", "FRESH", and "HALF-RECIRCULATION".

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: When the target position is "RECIRCULATION" (- 10%), the actual opening angle is 19.0% or less.

When the target position is "FRESH" (110%), the actual opening angle is 81.0% or more.

Result

2 PERFORM ACTIVE TEST BY INTELLIGENT TESTER

(a) Remove the glove box to see and check the recirculation damper operation.

(b) Connect the intelligent tester to the DLC3.

(c) Turn the ignition switch to the ON position and turn the intelligent tester main switch on.

(d) Select the item below in the ACTIVE TEST and then check that the damper operates.

ACTIVE TEST / AIR CONDITIONER

OK: Lever turns from "RECIRCULATION" side to "FRESH" side smoothly.

Lever turns from "FRESH" side to "RECIRCULATION" side smoothly.

Result

3 PERFORM ACTUATOR CHECK

(a) Remove the glove box to see and check the recirculation damper operation.

(b) Enter the actuator check mode (See page AC-15).

(c) Press the DEF switch and check the operation of the recirculation damper.

OK: Recirculation damper position changes in accordance with each display code.

Result

4 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) Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 4, then check that the lever turns to the "FRESH" position smoothly.

OK: Lever turns to "FRESH" position smoothly.

(d) Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 5, then check that the lever turns to the "RECIRCULATION" position smoothly.

OK: Lever turns to "RECIRCULATION" position smoothly.

5 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

REPLACE A/C AMPLIFIER