T-SB-0001-21

T-SB-0001-21
January 5, 2021
Driver Side and/or Passenger Side LED Parking Lights
Intermittent Operation When the Headlights are On
Service
Category
Vehicle Exterior
Section
Lighting (ext)
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2019 - 2021
Avalon, Avalon HV
Introduction
Some 2019 – 2021 model year Avalon and Avalon Hybrid vehicles may exhibit a condition where
the driver side and/or passenger side LED parking lights do not fully illuminate when the headlight
switch and the engine are on and the vehicle is in reverse. Follow the Repair Procedure in this
bulletin to address this condition.
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.

All 2019 – 2020 model year Avalon and Avalon Hybrid vehicles.

2021 model year Avalon and Avalon Hybrid vehicles produced BEFORE the Production
Change Effective VINs shown below.
MODEL
Avalon HV
MODEL YEAR
2021
VDS
PRODUCTION CHANGE EFFECTIVE VIN
AA1AB
4T1AA1AB#MU002937
CA1AB
4T1CA1AB#MU002956
DA1AB
4T1DA1AB#MU002952
EA1AB
4T1EA1AB#MU002955
JA1AB
4T1JA1AB#MU002977
© 2021 Toyota Motor Sales, USA
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Driver Side and/or Passenger Side LED Parking Lights Intermittent Operation
When the Headlights are On
Production Change Information (continued)
MODEL
Avalon
MODEL YEAR
2021
VDS
PRODUCTION CHANGE EFFECTIVE VIN
AZ1FB
4T1AZ1FB#MU059379
CZ1FB
4T1CZ1FB#MU059453
DZ1FB
4T1DZ1FB#MU059406
EZ1FB
4T1EZ1FB#MU059392
FZ1FB
4T1FZ1FB#MU059381
GZ1FB
4T1GZ1FB#MU059347
HZ1FB
4T1HZ1FB#MU059437
JZ1FB
4T1JZ1FB#MU059424
KB1BB
4T1KB1BB#MU001784
LB1BB
4T1LB1BB#MU001785
NB1BB
4T1NB1BB#MU001778
BZ1FB
4T1BZ1FB#MU059399
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EL1963
Replace the Headlight Assembly
FBD Module (Both Sides)
2.0
81107-07210
87
74
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.
© 2021 Toyota Motor Sales, USA
T-SB-0001-21
January 5, 2021
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Driver Side and/or Passenger Side LED Parking Lights Intermittent Operation
When the Headlights are On
Parts Information
PART NUMBER
PART NAME
QTY
81107-07210
Full Beam Driver Module (FBD) L & R
2
90069-32108
Screw
6
Repair Procedure
1. Taking ALL safety precautions, confirm the condition exists.
CAUTION
It is recommended this step be completed by two technicians as the vehicle engine will be
ON and the vehicle will be in reverse.
NOTE
As the condition is intermittent, repeat step 1 three times to ensure the condition exists.
Do the driver side AND passenger side LED parking lights fully illuminate when the headlight
switch and the engine are ON and the vehicle is in reverse?


YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
NO — Continue to step 2.
2. Remove BOTH headlight assemblies.
Refer to TIS, applicable model and model year Repair Manual:

2019 – 2021 Avalon and Avalon HV:
Vehicle Exterior – Lighting (Ext) – “Lighting (Ext) Headlight Assembly: Removal”
3. Perform the following action on BOTH headlight assemblies:
Uninstall the Full Beam Driver (FBD) module from the headlight assembly.
NOTICE
Place the headlight assembly on a clean and soft surface so the bottom of the light is
exposed, and the lens is NOT damaged.
© 2021 Toyota Motor Sales, USA
T-SB-0001-21
January 5, 2021
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Driver Side and/or Passenger Side LED Parking Lights Intermittent Operation
When the Headlights are On
Repair Procedure (continued)
A. Identify the FBD module on the
headlight assembly.
Figure 1.
1
1
B. Using a standard T20 screwdriver,
remove the three T20 screws from the
FBD module.
FBD Module
Figure 2.
1
1
© 2021 Toyota Motor Sales, USA
T20 Screw
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January 5, 2021
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Driver Side and/or Passenger Side LED Parking Lights Intermittent Operation
When the Headlights are On
Repair Procedure (continued)
C. Remove the FBD module from the
headlight assembly.
Figure 3.
NOTICE
Do NOT stress the wires
when disassembling.
D. Depress the connector locking tab and
pull it away from the FBD module.
Figure 4.
1
1
© 2021 Toyota Motor Sales, USA
Connector Locking Tab
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Driver Side and/or Passenger Side LED Parking Lights Intermittent Operation
When the Headlights are On
Repair Procedure (continued)
4. Install the NEW FBD module.
Figure 5.
A. Confirm the FBD module seal position
on the NEW FBD module.
1
NOTICE
Confirm the FBD module seal is
FULLY flush with the FBD module
body along its full seal mounting
surface (diameter).
2
1
2
B. Line up the FBD module with the
headlight assembly mounting feature
as shown.
Correct Seal Position
(Fully Flush With the FBD Module Body)
Incorrect Seal Position
(Not Fully Flush With the FBD Module Body)
Figure 6.
© 2021 Toyota Motor Sales, USA
T-SB-0001-21
January 5, 2021
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Driver Side and/or Passenger Side LED Parking Lights Intermittent Operation
When the Headlights are On
Repair Procedure (continued)
C. Flip the FBD module over as shown.
Ensure to leave enough hand space
for the connector installation.
Figure 7.
D. Plug the harness into the NEW
FBD module.
Figure 8.
NOTICE
Listen for a click and pull slightly on
the connector to ensure it is FULLY
seated and locked in place.
© 2021 Toyota Motor Sales, USA
T-SB-0001-21
January 5, 2021
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Driver Side and/or Passenger Side LED Parking Lights Intermittent Operation
When the Headlights are On
Repair Procedure (continued)
E. Place the NEW FBD module into the
headlight assembly.
Figure 9.
NOTICE
Ensure there are NO wire harness
wires trapped between the FBD
module and the headlight assembly
mounting feature.
1
1
F. Install the three T20 screws to secure
the FBD module to the
headlight assembly.
Potential Pinch Surface
Figure 10.
Torque: 17 in-lbs
G. The FBD module installation
is complete.
Figure 11.
© 2021 Toyota Motor Sales, USA
T-SB-0001-21
January 5, 2021
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Driver Side and/or Passenger Side LED Parking Lights Intermittent Operation
When the Headlights are On
Repair Procedure (continued)
5. Install BOTH headlight assemblies.
Refer to TIS, applicable model and model year Repair Manual:

2019 – 2021 Avalon and Avalon HV:
Vehicle Exterior – Lighting (Ext) – “Lighting (Ext.) Headlight Assembly: Installation”
NOTE
AFTER installing the headlight assembly, ensure ALL applicable Repair Manual procedures are
followed (e.g., Initialization Procedure, Headlight Aiming Procedure, etc.).
6. Confirm the condition is no longer present.
© 2021 Toyota Motor Sales, USA