T-SB-0048-20

May 27, 2020

HVAC Servo Motor Malfunction
Service
Category

Vehicle Interior

Section

Heating/Air Conditioning

Market USA

Applicability
YEAR(S)

MODEL(S)

2017 - 2019

Land Cruiser

ADDITIONAL INFORMATION

Introduction

Some 2017 – 2019 model year Land Cruiser vehicles may exhibit one or more of the following
HVAC conditions:




Uneven temperature or air flow between the vents
Little or no air flow from the vent(s)
Improper MODE control function

Additionally, some vehicles may store one or more of the following HVAC servo Diagnostic
Trouble Codes (DTCs):













B1441 – Air Mix Damper Control Servo Motor Circuit
(Front Passenger Side Lower Air Mix)
B1442 – Air Inlet Damper Control Servo Motor Circuit
B1443 – Air Outlet Damper Control Servo Motor Circuit
B1445 – Passenger Side Cool Air Bypass Damper Control
B1446 – Air Mix Damper Control Servo Motor Circuit (Driver Side Lower Air Mix)
B1447 – Rear Air Mix Damper Control Servo Motor Circuit (Driver Side Lower Air Mix)
B1448 – Passenger Side Face Servo Motor Circuit
B1449 – Rear Air Outlet Damper Control Servo Motor Circuit
B1457 – Driver Side Air Outlet Damper Control Servo Motor Circuit
B1458 – Passenger Side Air Outlet Damper Control Servo Motor Circuit
B1486 – Driver Side Air Outlet Damper Control Servo Motor Circuit
B1488 – Rear Air Mix Damper Control Servo Motor Circuit (Front Passenger Side)

Follow the Repair Procedure in this bulletin to address these conditions.

© 2020 Toyota Motor Sales, USA

Page 1 of 4

T-SB-0048-20

May 27, 2020

Page 2 of 4

HVAC Servo Motor Malfunction
Production Change Information

This bulletin applies to vehicles produced AFTER the Production Change Effective VIN
shown below.
MODEL

FRAME TYPE

DRIVETRAIN

PRODUCTION CHANGE EFFECTIVE VIN

Land Cruiser

URJ200L

4WD

JTMCY7AJ#H4059943

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

AC2019

Air Conditioning Amplifier Reprogramming

0.5

88650-#####*

72

41

*Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being repaired
by searching Air Conditioning, Amplifier (88650) in the Electronic Parts Catalog using the VIN filter.

APPLICABLE WARRANTY
 This repair is covered under the Toyota Basic Warranty. This warranty is in effect for
36 months or 36,000 miles, whichever occurs first, from the vehicle’s in-service date.
 Warranty application is limited to occurrence of the specified condition described in
this bulletin.

Required Tools & Equipment
REQUIRED EQUIPMENT

SUPPLIER

Techstream ADVi*

QTY

TSADVUNIT

Techstream 2.0
Techstream Lite

PART NUMBER

TS2UNIT
ADE

Techstream Lite (Green Cable)

1

TSLITEPDLR01
TSLP2DLR01

*Essential SST.

NOTE
 Only ONE of the Techstream units listed above is required.
 Software version 15.00.028 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
 Use Techstream or an approved J2534 interface to perform flash reprogramming updates.
Visit techinfo.toyota.com for more information regarding J2534 reprogramming.
SPECIAL SERVICE TOOLS (SST)

PART NUMBER

QTY

Battery Diagnostic Tool*

DCA-8000P T

1

*Essential SST.

NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
© 2020 Toyota Motor Sales, USA

T-SB-0048-20

May 27, 2020

Page 3 of 4

HVAC Servo Motor Malfunction
Calibration Information
CALIBRATION ID

MODEL YEAR

MODEL

2017 – 2019

Land Cruiser

PREVIOUS

NEW

8865060Q2201
8865060Q2101
8865060Q1001

8865060W0001

Repair Procedure

1. Confirm one or more of the following conditions are present:


Uneven temperature or air flow between the vents.



Little or no air flow from the vent(s).



Improper MODE control function.

Does the vehicle exhibit ANY of the conditions listed above?


YES — Go to step 3.



NO — Continue to step 2.

2. Using Techstream, check for the following stored DTCs:


B1441 – Air Mix Damper Control Servo Motor Circuit
(Front Passenger Side Lower Air Mix).



B1442 – Air Inlet Damper Control Servo Motor Circuit.



B1443 – Air Outlet Damper Control Servo Motor Circuit.



B1445 – Passenger Side Cool Air Bypass Damper Control.



B1446 – Air Mix Damper Control Servo Motor Circuit (Driver Side Lower Air Mix).



B1447 – Rear Air Mix Damper Control Servo Motor Circuit (Driver Side Lower Air Mix).



B1448 – Passenger Side Face Servo Motor Circuit.



B1449 – Rear Air Outlet Damper Control Servo Motor Circuit.



B1457 – Driver Side Air Outlet Damper Control Servo Motor Circuit.



B1458 – Passenger Side Air Outlet Damper Control Servo Motor Circuit.



B1486 – Driver Side Air Outlet Damper Control Servo Motor Circuit.



B1488 – Rear Air Mix Damper Control Servo Motor Circuit (Front Passenger Side).

Are ANY of the DTCs listed above present?


YES — Continue to step 3.



NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.

© 2020 Toyota Motor Sales, USA

T-SB-0048-20

May 27, 2020

Page 4 of 4

HVAC Servo Motor Malfunction
Repair Procedure (continued)

3. Flash reprogram the air conditioning amplifier assembly.
NOTE
The air conditioning amplifier flash reprogram is ONLY performed one time if the air conditioning
amplifier has NOT been flash reprogrammed previously.

Follow the procedure outlined in Service Bulletin T-SB-0134-16, Techstream ECU Flash
Reprogramming Procedure and flash the air conditioning amplifier with the NEW calibration
file update.
NOTICE
 Damage to the air conditioning amplifier may occur if the correct battery charge mode
setting is NOT used.
 Power Supply Mode is used to maintain battery voltage at 13.5V while
flash reprogramming.
 For details on how to use the DCA-8000 battery diagnostic tool, refer to the
DCA-8000 Instruction Manual located at TIS – Diagnostics – Tools & Equipment –
Battery Diagnostics.

4. Confirm the condition(s) is (are) no longer present.
A. Does the vehicle exhibit ANY of the conditions listed in step 1?



YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
NO — Continue to sub step B.

B. Using Techstream, check for ANY stored DTCs.
Are ANY of the DTCs in step 2 present?



YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
NO — The repair is complete.

© 2020 Toyota Motor Sales, USA