NHTSA ID Number: 10187278
Manufacturer Communication Number: T-SB-0002-21
TSB/Document Date: 2021-02-16
Summary
TSB: Some 2016 ? 2017 model year Land Cruiser vehicles may exhibit one 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 (Passenger Side). ?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). ?B1447 ? Rear Air Mix Damper Control Servo Motor Circuit (Driver Side). ?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). Follow the procedures in this bulletin to address these conditions.
Figure 14.
A
1
z
B
z
z
1
2
1
z
2
z
A
Damper Servo Sub-assembly Side
1
Point 1
2
Point 2
B
© 2021 Toyota Motor Sales, USA
z
z
Air Conditioning Radiator Side
2
z
T-SB-0002-21
January 11, 2021
Page 27 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group A (Servo Replacement on Vehicle) (continued)
G. Confirm each link pin is inserted into
each corresponding link groove.
Figure 15.
A
z
CAUTION
B
The link pins will be misaligned if the
damper servo sub-assembly is
installed using force.
z
z
C
D
z
E
z
F
H. Install the damper servo sub-assembly with the four screws.
I.
Reconnect the clamp and the two connectors.
J. Is this the last servo being replaced?
YES — Go to the appropriate completion procedure.
NO — Go to the next servo replacement procedure.
© 2021 Toyota Motor Sales, USA
z
T-SB-0002-21
January 11, 2021
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group A (Servo Replacement on Vehicle) (continued)
2. Remove the passenger side lower
[9] air mix servo (F & R P).
A. Remove the instrument panel
safety pad assembly.
Refer to TIS, applicable model and
model year Repair Manual:
Figure 16.
Figure 17.
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior
Panels/Trim – “Interior Panels /
Trim: Instrument Panel Safety
Pad: Removal”
B. Disconnect the connector, remove the
three screws and the air mix servo.
Figure 18.
NOTE
Reuse the attaching screws. If a screw is
lost, order the following: 90099-00968.
© 2021 Toyota Motor Sales, USA
Page 28 of 68
T-SB-0002-21
January 11, 2021
Page 29 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group A (Servo Replacement on Vehicle) (continued)
C. Mark and store the removed air mix servo in a separate container to avoid reinstalling it
in error.
D. Install the NEW passenger side lower
air mix servo (F & R P) by aligning the
lever with the mark on the air
conditioning radiator side.
Figure 19.
1
NOTE
Do NOT wipe off the grease in
the groove.
E. Install the NEW passenger side lower
air mix servo (F & R P) three screws
and reconnect the connector.
2
1
Mark
2
Do Not Wipe the Grease
Figure 20.
STOP
Confirm the link pin is inserted into
the link groove.
F. Is this the last servo being replaced?
YES — Go to the appropriate completion procedure.
NO — Go to the next servo replacement procedure.
© 2021 Toyota
Motor Sales, USA
T-SB-0002-21
January 11, 2021
Page 30 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group B (Servo Replacement on Vehicle)
[11] Replace Air Outlet Servo (Rr D)
[12] Replace Rear Air Mix Servo (P)
NOTE
If there are currently servos requiring replacement that are BOTH in group B AND in group D, perform
the rear cooling unit removal steps from group D (page 59) first, then follow the servo replacement steps
from group B to replace the group B servo. Replace ALL group B servo(s) BEFORE reinstalling rear
cooling unit.
1. Remove the [11] air outlet servo (Rr D).
Figure 21.
Figure 22.
A. Remove the rear No. 2
seat assembly LH.
Refer to TIS, applicable model and
model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Seat –
“Seat: Rear No. 2 Seat
Assembly: Removal”
© 2021 Toyota Motor Sales, USA
T-SB-0002-21
January 11, 2021
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group B (Servo Replacement on Vehicle) (continued)
B. Remove the rear floor mat rear
support plate.
Figure 23.
Refer to TIS, applicable model and
model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior
Panels/Trim – “Interior Panels /
Trim: Roof Headlining: Removal”
C. Remove the rear step cover.
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior Panels/Trim –
“Interior Panels / Trim: Roof Headlining: Removal”
D. Remove the rear door scuff plate LH.
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior Panels / Trim –
“Interior Panels / Trim: Roof Headlining: Removal”
E. Remove the No. 1 luggage
compartment trim hook.
Figure 24.
Refer to TIS, applicable model and
model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior
Panels/Trim – “Interior Panels /
Trim: Roof Headlining: Removal”
© 2021 Toyota Motor Sales, USA
Page 31 of 68
T-SB-0002-21
January 11, 2021
Page 32 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group B (Servo Replacement on Vehicle) (continued)
F. Remove the front quarter trim panel
assembly LH.
Figure 25.
Refer to TIS, applicable model and
model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior
Panels/Trim – “Interior Panel /
Trim: Roof Headlining: Removal”
G. Remove the two screws and plate
cover from the air outlet servo (Rr D).
Figure 26.
NOTE
Reuse the attaching screws. If a screw is
lost, order the following: 90099-00968.
H. Disengage the claw and remove
the plate.
Figure 27.
CAUTION
Do NOT raise the claws too much to
avoid breaking them. ONLY raise
them enough to disengage.
1
Claw
1
© 2021 Toyota Motor Sales, USA
z
T-SB-0002-21
January 11, 2021
Page 33 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group B (Servo Replacement on Vehicle) (continued)
I.
Mark and store the removed plate in a separate container to avoid reinstalling it in error.
J. Disconnect the connector and remove
the two screws to remove the servo.
Figure 28.
NOTE
Reuse the attaching screws. If a screw is
lost, order the following: 90099-00968.
K. Mark and store the removed air mix servo in a separate container to avoid reinstalling
it in error.
L. Before you install the NEW air outlet servo (Rr D), turn the gear on the rear cooling unit
side clockwise fully.
CAUTION
If the servo is installed with the gear turned counterclockwise fully, the servo
malfunctions and it will be required to remove/install the servo again. Make sure to
install the servo after turning the gear clockwise fully.
© 2021 Toyota Motor Sales, USA
T-SB-0002-21
January 11, 2021
Page 34 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group B (Servo Replacement on Vehicle) (continued)
M. Align the NEW servo as shown in the illustration.
Figure 29.
1
1
Match Marks
N. Install the two screws and reconnect the connector.
© 2021 Toyota Motor Sales, USA
z
T-SB-0002-21
January 11, 2021
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group B (Servo Replacement on Vehicle) (continued)
O. Reinstall the plate cover with the
two screws.
Figure 30.
P. Is this the last servo being replaced?
YES — Go to the appropriate completion procedure.
NO — Go to the next servo replacement procedure.
© 2021 Toyota Motor Sales, USA
Page 35 of 68
T-SB-0002-21
January 11, 2021
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group B (Servo Replacement on Vehicle) (continued)
2. Remove the [12] rear air mix servo (P).
A. Remove the rear No. 2 seat
assembly LH.
Figure 31.
Figure 32.
Refer to TIS, applicable model and
model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Seat –
“Seat: Rear No. 2 Seat
Assembly: Removal”
B. Remove the rear floor mat rear
support plate.
Figure 33.
Refer to TIS, applicable model and
model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior
Panels/Trim – “Interior Panels /
Trim: Roof Headlining: Removal”
© 2021 Toyota Motor Sales, USA
Page 36 of 68
T-SB-0002-21
January 11, 2021
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group B (Servo Replacement on Vehicle) (continued)
C. Remove the rear step cover.
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior Panels/Trim –
“Interior Panels / Trim: Roof Headlining: Removal”
D. Remove the rear door scuff plate LH.
Refer to TIS, applicable model and
model year Repair Manual:
Figure 34.
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior
Panels/Trim – “Interior Panels /
Trim: Roof Headlining: Removal”
E. Remove the front quarter trim panel
assembly LH.
Figure 35.
Refer to TIS, applicable model and
model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior
Panels/Trim – “Interior Panels /
Trim: Roof Headlining: Removal”
© 2021 Toyota Motor Sales, USA
Page 37 of 68
T-SB-0002-21
January 11, 2021
Page 38 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group B (Servo Replacement on Vehicle) (continued)
F. Disconnect the connector, remove the
two screws, and the servo.
Figure 36.
NOTE
If it is difficult to remove the servo and
gear together, remove the servo after
disconnecting the gear.
Reuse the attaching screws.
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TSB/Document ID: T-SB-0002-21
Replacement Service Bulletin Number:
MFR Communication Date: 2021-01-11
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: AIR BAGS
MFR Component System:
MFR Component Subsystem:
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