Lexus ES300 (1997 year). Service manual - part 55

AC0BT–01

N21075

N21076

N21078

LCD Lighting

Night Lighting

Night Lighting

AC–104

–

AIR CONDITIONING

AIR CONDITIONING CONTROL ASSEMBLY

1661

1997 LEXUS ES300   (RM511U)

DISASSEMBLY

1.

REMOVE A/C AMPLIFIER

(a)

Release the 4 claws and remove the rear cover.

(b)

Pull out the A/C amplifier backward.

HINT:
Hold the supply parts A/C amplifier using the electrostatic pre-
vention bag it comes packed in.

2.

SEPARATE A/C CONTROL PANEL AND A/C AMPLIFI-
ER CASE

(a)

Remove the 3 screws.

(b)

Release the 4 claws, then separate the A/C control panel
and A/C amplifier case.

3.

REMOVE BULB

Using a screwdriver, turn the bulb to left and pull out the bulb.

Z19570

28

18

AC0BU–02

Z19568

30

29

42

–

AIR CONDITIONING

AIR CONDITIONING CONTROL ASSEMBLY

AC–105

1662

1997 LEXUS ES300   (RM511U)

INSPECTION

1.

INSPECT NIGHT LIGHTING

Connect the positive (+) lead from the battery to terminal 28 and
the negative (–) lead to terminal 18, then check that the illumina-
tion lights up.
If there is bulb not light up, replace the bulb only.
If all bulb does not light up, replace the A/C control panel.

2.

INSPECT LCD LIGHTING

Connect the positive (+) lead from the battery to terminal 29, 42
and the negative (–) lead to terminal 30, then check that the illu-
mination lights up.
If there is bulb not light up, replace the replace the bulb only.
If the 2 bulbs do not light up, try replace the bulb with a new one
If the bulbs do not light up, replace the A/C control panel.

Z19567

29

42

30

Z19569

21

30

AC–106

–

AIR CONDITIONING

AIR CONDITIONING CONTROL ASSEMBLY

1663

1997 LEXUS ES300   (RM511U)

3.

INSPECT SWITCH OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
29, 42 and the negative (–) lead to terminal 30.

(b)

Operate the switches and check that the indicator and
LCD indication change, as shown in the illustration.

If operation is not as specified, replace the A/C control panel.

4.

INSPECT SECURITY INDICATOR

Connect the positive (+) lead from the battery to terminal 21 and
negative (–) lead to terminal 30, then check that the indicator
light up.
If operation is not as specified, replace the A/C control panel.
5.

INSPECT A/C CONTROL ASSEMBLY CIRCUIT (See
page 

DI–526

)

AC0BV–01

–

AIR CONDITIONING

AIR CONDITIONING CONTROL ASSEMBLY

AC–107

1664

1997 LEXUS ES300   (RM511U)

REASSEMBLY

Reassembly is in the reverse order of disassembly (See page 

AC–104

).