Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

Actuator check.

PREPARATION:

Remove glove box to see and check the air inlet damper operation.
Set to the actuator check mode (See PRE-CHECK ).
Press the driver side UP switch and change it to step operation.

CHECK:

Press the driver side UP switch in order and check the operation of air inlet damper.

OK:

DAMPER POSITION RESISTANCE SPECIFICATION

Display Code	Air Inlet Damper
0 - 1	FRS
2	F/R
3	REC
4 - 9	FRS

Fig 1: Checking Actuator

OK : Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
NG : Go to next step.

Check air inlet damper control servomotor.
PREPARATION:

Remove air inlet servomotor (See ).

CHECK:

Connect positive (+) lead to terminal 4 and negative (-) lead to terminal 5.

OK:

The lever moves smoothly to REC position.

CHECK:

Connect positive (+) lead to terminal 5 and negative (-) lead to terminal 4.

OK:

The lever moves smoothly to FRS position.

Fig 2: Identifying Air Inlet Damper Control Servomotor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : Replace air inlet damper control servomotor assembly.
2. OK : Go to next step.
Check harness and connector between A/C ECU and air inlet damper control servomotor (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG : Repair or replace harness or connector.
2. OK : Check and replace A/C ECU.