Lexus ES300 (1997 year). Manual - part 447

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–565

717

1997 LEXUS ES300   (RM511U)

3

Check harness and connector between A/C control assembly and air mix control
servomotor (See page 

IN–27

).

NG

Repair or replace harness or connector.

OK

Chek and replace A/C control assembly
(See page 

IN–27

).

I00360

From HEATER Fuse

A/C Control Assembly

IG

AIF

AIR

GND

26

A13

6

A13

7

A13

14

A13

L–Y

R

Air Inlet Control Servomotor

6

7

II

W–B

J/C

J15

A

A

W–B

J/C

DI–566

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

718

1997 LEXUS ES300   (RM511U)

DTC

    42

Air Inlet Control Servomotor Circuit

CIRCUIT DESCRIPTION

The air inlet control servomotor is controlle by the A/C control assembly and moves the air inlet damper to
the desired position.

DTC No.

Detection Item

Trouble Area

42

Air inlet damper position sensor value does not change even if

A/C control assembly operates air inlet control servomotor.

Air inlet damper position sensor.

Harness or connector between air inlet control servomotor

and A/C control assembly.

A/C control assembly.

WIRING DIAGRAM

DI0DI–01

AC3023

I00358

REC

FRS

1

2

1

2

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–567

719

1997 LEXUS ES300   (RM511U)

INSPECTION PROCEDURE

1

Actuator check.

PREPARATION:
(a)

Remove glove box to see and check the air inlet damper
operation.

(b)

Set to the actuator check mode (See page 

DI–528

).

(c)

Press the DEF switch and change it to step operation.

CHECK:
Press the DEF switch and check the operation air inlet damper.
OK:

Display Code

Air Inlet Damper

0 – 2

FRS

3

REC/FRS

4 – 9

REC

OK

Proceed to next circuit inspection shown on
matrix chart (See page 

DI–535

).

NG

2

Check air inlet control servomotor.

PREPARATION:
Remove air inlet control servomotor (See page 

AC–70

).

CHECK:
Connect positive (+) lead to terminal 2 and negative (–) lead to
terminal 1.
OK:

The lever moves smoothly to REC position.

CHECK:
Connect negative (–) lead to terminal 2 and positive (+) lead to
terminal 1.
OK:

The lever moves smoothly to FRS position.

NG

Replace air inlet control servomotor assembly.

OK

DI–568

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

720

1997 LEXUS ES300   (RM511U)

3

Check harness and connector between A/C control assembly and air inlet con-
trol servomotor. (See page 

IN–27

).

NG

Repair or replace harness or connector.

OK

Check and replace A/C control assembly.