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.
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group D (Servo Requiring the Rear A/C Unit Removal From the Vehicle)
[6] Rear Air Mix Servo
1. Remove the rear cooling unit Assembly.
Figure 74.
Refer to TIS, applicable model and model
year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Heating/Air
Conditioning – “Heating /
Air Conditioning: Rear Air
Conditioning Unit: Removal”
NOTE
Replace the packing for the radiator
drain cock even though the repair
manual states to reuse. The
replacement of the rear air mix
Servo can be performed without
removing the rear bumper.
Figure 75.
1
z
2
1
A. Remove the rear quarter panel
mudguard LH by removing the six
T30 “TORX” screws and removing
the two clips.
A
z
z
z
A
Hold Air Conditioner Tube and Accessory Firmly
1
Convex Portion
2
Protective Tape
Figure 76.
© 2021 Toyota
Motor Sales, USA
T-SB-0002-21
January 11, 2021
Page 60 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group D (Servo Requiring the Rear A/C Unit Removal From the Vehicle) (continued)
B. Remove the No. 2 luggage
compartment side cover protector
by removing the five screws and
two grommets.
Figure 77.
C. Mark and store the removed grommets in a separate container to avoid reinstalling
it in error.
D. Remove the rear air mix servo by
disconnecting the connector and
removing the two screws.
Figure 78.
© 2021 Toyota Motor Sales, USA
T-SB-0002-21
January 11, 2021
Page 61 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Replacement Procedure Group D (Servo Requiring the Rear A/C Unit Removal From the Vehicle) (continued)
E. Install the NEW air mix servo by
aligning the servo as shown in the
illustration and install it with the two
screws and reconnect the connector.
Figure 79.
1
1
Alignment Point
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
z
T-SB-0002-21
January 11, 2021
Page 62 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Completion Procedure – Group A
1. Reassemble the vehicle in the following order by servo replacement:
Group A servos:
NUMBER
DTC CODE
[1]
B1446
[3]
B1443
[9]
B1458
2. Reinstall the instrument panel safety
pad assembly.
Refer to TIS, applicable model and model
year Repair Manual:
PART NUMBER
87106-60290
87106-50550
Figure 80.
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior Panels / Trim
– “Interior Panels / Trim: Instrument
Panel Safety Pad: Installation”
3. Initialize the servo(s).
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Heating/Air Conditioning –
“Heating / Air Conditioning: Air Conditioning System: Initialization”
4. Check for DTCs.
© 2021 Toyota Motor Sales, USA
DESCRIPTION
Air Mix Servo (D)
Air Outlet Servo (D)
Air Mix Servo (F & R P)
T-SB-0002-21
January 11, 2021
Page 63 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Completion Procedure – Group B
1. Reassemble the vehicle in the following order by servo replacement:
Group B servos:
NUMBER
DTC CODE
PART NUMBER
DESCRIPTION
[11]
B1449
87106-58030
Air Outlet Servo (Rr D)
[12]
B1488
87106-60280
Rear Air Mix Servo (P)
2. Reinstall the front quarter trim panel
assembly LH.
Figure 81.
Refer to TIS, applicable model and model
year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior Panels/Trim –
“Interior Panels / Trim: Roof
Headlining: Installation”
3. Reinstall the No.1 luggage compartment
trim hook.
Figure 82.
Refer to TIS, applicable model and model
year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior Panels/Trim –
“Interior Panels / Trim: Roof
Headlining: Installation”
4. Reinstall 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: Installation”
© 2021 Toyota Motor Sales, USA
T-SB-0002-21
January 11, 2021
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Completion Procedure – Group B (continued)
5. Reinstall the rear floor mat rear
support plate.
Figure 83.
Refer to TIS, applicable model and model
year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Interior Panels/Trim –
“Interior Panels / Trim: Roof
Headlining: Installation”
6. Reinstall the rear No. 2 seat
assembly LH.
Figure 84.
Refer to TIS, applicable model and model
year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Seat – “Seat: Rear
No. 2 Seat Assembly: Installation”
7. Initialize the servo(s).
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Heating/Air Conditioning –
“Heating / Air Conditioning: Air Conditioning System: Initialization”
8. Check for DTCs.
© 2021 Toyota Motor Sales, USA
Page 64 of 68
T-SB-0002-21
January 11, 2021
Page 65 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Completion Procedure – Group C
1. Reassemble the vehicle in the following order by servo replacement:
Group C servos:
NUMBER
DTC CODE
[1]
B1446
[3]
B1443
[2]
B1441
[5]
B1445
[7]
B1448
[8]
B1457
[10]
B1486
[4]
B1442
2. Reinstall the air conditioning
radiator assembly.
PART NUMBER
87106-60290
DESCRIPTION
Air Mix Servo (D)
Air Outlet Servo (D)
Air Mix Servo (P)
87106-60310
Cool Air Bypass Servo
Air Outlet Servo (P)
87106-60330
87106-50550
Air Mix Servo (F & R D)
Air Outlet Servo (F & R D)
Air Inlet Damper Servo
Figure 85.
Refer to TIS, applicable model and model
year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Heating/Air
Conditioning – “Heating /
Air Conditioning: Front Air
Conditioning Unit: Reassembly”
3. Reinstall the air conditioning harness.
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Heating/Air Conditioning –
“Heating / Air Conditioning: Front Air Conditioning Unit: Reassembly”
© 2021 Toyota Motor Sales, USA
T-SB-0002-21
January 11, 2021
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Completion Procedure – Group C (continued)
4. Reinstall the blower assembly.
Figure 86.
Refer to TIS, applicable model and model
year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Heating/Air
Conditioning – “Heating /
Air Conditioning: Blower
Unit: Installation”
5. Reinstall the front air conditioning
unit assembly.
Figure 87.
Refer to TIS, applicable model and model
year Repair Manual:
2016 – 2017 Land cruiser:
Vehicle Interior – Heating/Air
Conditioning – “Heating /
Air Conditioning: Front Air
Conditioning Unit: Installation”
6. Initialize the servo(s).
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Heating/Air Conditioning –
“Heating / Air Conditioning: Air Conditioning System: Initialization”
7. Check for DTCs.
© 2021 Toyota Motor Sales, USA
Page 66 of 68
T-SB-0002-21
January 11, 2021
Page 67 of 68
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Completion Procedure – Group D
1. Reassemble the vehicle in the following order by servo replacement:
Group D servos:
NUMBER
DTC CODE
PART NUMBER
DESCRIPTION
[6]
B11447
87106-28170
Rear Air Mix Servo
2. Reinstall the rear cooling unit assembly.
Refer to TIS, applicable model and model
year Repair Manual:
Figure 88.
2016 – 2017 Land Cruiser:
Vehicle Interior – Heating/Air
Conditioning – “Heating /
Air Conditioning: Rear Air
Conditioning Unit: Installation”
3. Reinstall the No. 2 luggage compartment
side cover protector with the two NEW
grommets and install the six screws.
Figure 89.
1
4. Reinstall the rear quarter panel mudguard
LH with the two clips and install the six T30
“TORX” screws.
NEW Grommet
Figure 90.
© 2021 Toyota Motor Sales, USA
T-SB-0002-21
January 11, 2021
HVAC Servo Motor Malfunction
Damper Servo Sub-assembly Replacement Procedure (continued)
Completion Procedure – Group D (continued)
5. Initialize the servo(s).
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2017 Land Cruiser:
Vehicle Interior – Heating/Air Conditioning –
“Heating / Air Conditioning: Air Conditioning System: Initialization”
6. Check for DTCs.
© 2021 Toyota Motor Sales, USA
Page 68 of 68
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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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