Lexus SC300 / Lexus SC400. Manual — part 944

1992 - 1995 SC 300/400 A/C CONTROL ASSEMBLY SERVICE PARTS

Page 6 of 6

MODEL

YEAR

Control Panel

Control Switch

Bulb

PART NUMBER INFORMATION:

PART NAME

PART NUMBER

MODEL APPLICATION

QTY

55902-24010

‘92-‘94

SC 300/SC 400

1

55902-24020

‘95

SC 300/SC 400

1

88601-24020

‘92-‘94

SC 300/SC 400

1

88601-24030

‘95

SC 300/SC 400

1

84999-60360

‘92-‘94

SC 300/SC 400

3

84999-60340

‘95

SC 300/SC 400

3

88650-24150

‘92

SC 300

1

88650-24160

‘92

SC 400

1

Amplifier with Case

88650-24190

‘93-‘94

SC 300

1

88650-24200

‘93-‘94

SC 400

1

88650-24231

‘95

SC 300/SC 400

1

Wire Harness

88484-24010

‘92-‘95

SC 300/SC 400

1

Screws

90094-90416

‘92-‘95

SC 300/SC 400

*

*

Screw Replacement not required for repair

WARRANTY INFORMATION:

OPCODE

DESCRIPTION

TIME*

OPN

T1

T2

883851

A/C Control Assy, R&R

0.6

55900-XXXXX

**

**

Combo “A”

Control Panel R&R

0.2

22902-XXXXX

**

**

Combo “C”

Bulbs R&R

0.2

84999-XXXXX

**

**

Combo “D”

Amplifier with Case R&R

0.2

88650-XXXXX

**

**

Combo “E”

Wire Harness R&R

0.2

88484-XXXXX

**

**

Combo “G”

Control Switch R&R

0.2

88601-XXXXX

**

**

*

Listed time for sub–operations are to be added to base operation to R&R the A/C control Assembly
and include all necessary checks and tests.

** As applicable per the Lexus Universal Flat Rate Manual.

TSIB

Introduction

A musty odor may be emitted from the air conditioning system of some vehicles which are
usually operated in areas with high temperature and humidity. It is most noticeable when
the air conditioner is first turned “ON” after the vehicle has been parked for several hours.
The odor could result from one or more of the following conditions:

1.

Blockage of the evaporator housing drain pipe, resulting in the build up of condensation.

2.

Microbial growth in the evaporator, arising from dampness in the evaporator housing
where the cooling air flow is dehumidified.

To address excessive air conditioning evaporator odor, check the evaporator housing drain
pipe for blockage. If no problems are found, the evaporator and housing should be cleaned
and disinfected using the general procedure given on page 2, and the model specific
procedure on the pages indicated in the Table of Contents at the bottom of this page.

Affected

S

While this procedure may be used on any Lexus vehicle, this bulletin gives details

Vehicles

specifically for the ’92–’96 ES 300, all GS 300, ’93–’94 LS 400, all SC 300/400 and the
LX 450.

Tools &

PART NUMBER

DESCRIPTION OF TOOLS & MATERIALS

QUANTITY

SOURCE

Materials

08821–00810–01

Spray Gun Kit

1

OTC

08821–00811–01

Spray Gun (replacement)

(1)

OTC

08821–00812–01

Spray Gun Nozzle (replacement)

(1)

OTC

08821–00813–01

Freshener Mixing Container (replacement)

(1)

OTC

08821–00801–DS

Air Conditioning Freshener

1 per vehicle

TMS

CAUTION:

Wear safety glasses, protective mask, and gloves while working with the
freshener.

Warranty

OPCODE

DESCRIPTION

TIME

OPN

T1

T2

Information

N/A

No applicable warranty information

–

–

–

–

Table of

MODEL

PAGE

MODEL

PAGE

MODEL

PAGE

MODEL

PAGE

Contents

ES 300

3

GS 300

5

LS 400

7

GENERAL

2

SC 300

9

SC 400

9

LX 450

11

General Procedure applies to all models and model years.

The Specific Model Sections cover only the listed “affected models.”

HEA

TING &

AIR CONDITIONING

September 12, 1997

Title:

AIR CONDITIONING EVAPORATOR ODOR

Models:

’92–96 ES 300, ’93–’94 LS 400,
All GS 300, SC 300/400, LX 450.

Page 1 of 11

AC001–97

AIR CONDITIONING EVAPORATOR ODOR

– AC001–97

September 12, 1997

General

1.

Preparation of freshener solution:

Procedure

(a) Invert freshener container and shake vigorously for 30 seconds.
(b) Mix 3.4 fl. oz. of freshener (1 container) with 30 fl. oz. to make 1 qt. of solution.

2.

Drying the evaporator:

S

Dry the evaporator for 10 minutes with the following settings:
A/C:

Off

. . . . . . . . . . .

Air Outlet:

Foot

. . . . . .

Mode:

Recirc.

. . . . . . . . . .

Blower:

High

. . . . . . . .

Temp:

Max Warm

. . . . . . . . . .

3. Evaporator Treatment Preparation:

(a) Ensure availability of 30–45 psi compressed air to be used with spray gun

for application of freshener.

(b) Place a tray under the evaporator housing drain hose to collect used cleaning

solution.

(c) Place shop cloth under the evaporator housing in the vehicle to prevent cleaning

solution from dripping onto the floor mat.

4.

Vehicle Preparation: See specific model section.

5.

Evaporator treatment:

(a) Set HVAC mode as follows:

A/C:

Off

. . . . . . . . . . .

Air Outlet:

Face

. . . . . .

Mode:

Fresh

. . . . . . . . . .

Blower:

High

. . . . . . . .

Temp:

Max Warm

. . . . . . . . . .

Windows:

Open

. . . . . .

(b) Insert spray nozzle into the filter inlet

and spray the entire quantity (1 qt.) of
freshener solution into the evaporator
while moving the nozzle around to
cover the complete evaporator surface.

(c) Turn the blower OFF.

6.

Reinstallation of Parts.

7.

Completion of Treatment.

(a) Dry the evaporator for 30 minutes with

the following settings:
A/C:

Off

. . . . . . . . . . .

Air Outlet:

Foot

. . . . . .

Mode:

Recirc.

. . . . . . . . . .

Blower:

High

. . . . . . . .

Temp:

Max Warm

. . . . . . . . . .

Windows:

Closed

. . . . . .

(b) If the vehicle still has alcohol smell, open

windows for ventilation. Do not turn on
the AC switch until the evaporator is
completely dry as this can reduce the
effectiveness of the solution.

Page 2 of 11

CAUTION

Do not get into the vehicle during
this drying operation.

Page 3 of 11

AIR CONDITIONING EVAPORATOR ODOR

– AC001–97

September 12, 1997

ES 300

1.

Removal of parts.

(’92–’96)

(a) Pull down the carpet from the center

console as indicated by red arrow in the
illustration.

(b) Remove the plate on the side of the

heater unit using steps

¬

and

Ë

,

indicated with red arrows to show
direction, in the illustration.

CAUTION:

Do not bend the cable.

NOTE:

The Plate will be reused.

(c) Remove the filter.

(d) Remove the blower controller.

2.

Clean the Evaporator.

S

Follow the general procedures given
on page 2.

NOTE:

Location for insertion of spray nozzle
is indicated by the

red

arrow in the

illustration.