TSB007022

T-SB-0070-22
Rev1
August 16, 2022
Rear Air Suspension Feels Rough Over Bumps
Service
Category
Suspension
Section
Suspension Control System
Market USA and Mexico
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2023
Sequoia HV
VDS(s): AAAAA, AAABA
2022 - 2023
Tundra, Tundra HV
VDS(s): JA5AA, JA5AB, JA5BC, JA5DA,
JA5DB, JA5EC, JC5AB, JC5BC, JC5DB,
JC5EC, LA5AA, LA5AB, LA5BC, LA5CD,
LA5DA, LA5DB, LA5EC, LA5GD, MA5AB,
MA5BC, MA5DB, MA5EC, MC5AB, MC5BC,
MC5DB, MC5EC, NA5AB, NA5BC, NA5DB,
NA5EC, NC5AB, NC5BC, NC5DB, NC5EC,
VC5DB
REVISION NOTICE
February 02, 2023 Rev1:
 Applicability has been updated to include 2023 model year Sequoia Hybrid, Tundra, and
Tundra Hybrid vehicles.
Any previous printed versions of this bulletin should be discarded.
Introduction
Some 2023 model year Sequoia Hybrid and 2022 – 2023 model year Tundra and Tundra Hybrid
vehicles equipped with air suspension may exhibit a rough-ride feel when driving over uneven road
conditions such as bumps or dips. Follow the Repair Procedure in this bulletin to address
this condition.
© 2022 Toyota Motor Sales, USA
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Rear Air Suspension Feels Rough Over Bumps
Table of Contents

Warranty Information .................................................................................................................. 3

For USA Market .................................................................................................................... 3

For Mexico Market ................................................................................................................ 3

Required Tools & Equipment...................................................................................................... 4

Repair Procedure ....................................................................................................................... 4
© 2022 Toyota Motor Sales, USA
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Rear Air Suspension Feels Rough Over Bumps
Warranty Information
For USA Market
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
SU1922
Adjust the Height Control Sensor for
Both Sides and Adjust the Headlights
1.0
89407-0C010
34
99
APPLICABLE WARRANTY (USA)
 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.
For Mexico Market
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
SU1922
Adjust the Height Control Sensor for
Both Sides and Adjust the Headlights
1.0
89407-0C010
34
99
APPLICABLE WARRANTY (MEXICO)
 This repair is covered under the Toyota Basic Warranty. This warranty is in effect for
36 months or 60,000 kilometers, whichever occurs first, from the vehicle’s in-service date.
 Warranty application is limited to occurrence of the specified condition described in
this bulletin.
© 2022 Toyota Motor Sales, USA
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Rev1
August 16, 2022
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Rear Air Suspension Feels Rough Over Bumps
Required Tools & Equipment
REQUIRED TOOLS & MATERIAL
QUANTITY
Metric Ruler
1
REQUIRED EQUIPMENT
SUPPLIER
Techstream ADVI*
PART NUMBER
QTY
TSADVUNIT
Techstream 2.0
TS2UNIT
ADE
1
Techstream Lite
TSLITEPDLR01
Techstream Lite (Green Cable)
TSLP2DLR01
*Essential SST.
NOTE
 Only ONE of the Techstream units listed above is required.
 Software version 17.30.011 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787 (USA) or 01-55-50103041 (Mexico).
Repair Procedure
1. Confirm the condition exists.
Does the vehicle exhibit a rough-ride feel when driving over uneven road conditions such as
bumps or dips?


YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Drive the vehicle onto an alignment rack and cycle the vehicle height twice.
Refer to TIS, applicable model and model year Repair Manual:
NOTE
ONLY perform step 1.

2023 Sequoia Hybrid:
Suspension – Suspension Control System – “Suspension Control: Suspension Control
System: Adjustment”

2022 – 2023 Tundra and Tundra Hybrid:
Suspension – Suspension Control System – “Suspension Control: Suspension Control
System: Adjustment”
© 2022 Toyota Motor Sales, USA
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Rear Air Suspension Feels Rough Over Bumps
Repair Procedure (continued)
3. Using Techstream, perform a Health Check on the vehicle. From the Health Check results,
select Air suspension as shown.
Figure 1. Health Check
4. Ensure the Techstream display settings are set to metric. Note the initial values displayed by Air
Suspension Live for the RR Height Control Sensor and the RL Height Control Sensor.
Figure 2. Techstream Air Suspension Live
© 2022 Toyota Motor Sales, USA
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Rear Air Suspension Feels Rough Over Bumps
Repair Procedure (continued)
5. Under the vehicle, measure the distance between each rear bump stop and the top of the rear
axle housing, as shown below.
Figure 3.
Figure 4. Bump Stop to Rear Axle Housing Gap
1
2
1
Bump Stop
2
Rear Axle Housing
Is the gap less than 35 mm?

YES — Continue to step 6.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
© 2022 Toyota Motor Sales, USA
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Rear Air Suspension Feels Rough Over Bumps
Repair Procedure (continued)
6. Adjust the height control sensor for each side.
A. Loosen the height control sensor nut.
B. Move the height control sensor link plate along the slotted hole of the bracket until it is
positioned at the bottom of the slotted hole (see Figure 5).
C. Tighten and retorque the nut.
Torque: 5.6 N*m (57 kgf*cm, 50 in*lbf)
D. Repeat on the opposite side.
Figure 5. Nominal Factory Setting Versus New
Target Setting
Figure 6.
1
1
2
3
1
Nut (Loosen)
1
2
Factory Setting for Nut Position
3
New Target Setting for Nut Position
7. Cycle the suspension twice by repeating step 2 once.
© 2022 Toyota Motor Sales, USA
Height Control Sensor Link Plate
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Rear Air Suspension Feels Rough Over Bumps
Repair Procedure (continued)
8. Measure the bump stop to axle housing.
Is the gap measurement between
35 – 45 mm and equal side to side?

YES — Continue to step 9.

NO — Continue to adjust the height
control sensors until an axle
housing to bump stop gap of
35 – 45 mm is achieved. Then
continue to step 9.
Figure 7. Bump Stop to Rear Axle Housing Gap
NOTICE
Do NOT exceed 45 mm.
9. Using Techstream Air Suspension Live, confirm that the RR Height Control Sensor and the
RL Height Control Sensor measurements are within 10 mm of each other.
Figure 8.
Is the difference 10 mm or less?

YES — Continue to step 10.

NO — Continue to adjust the height control sensors until the side-to-side difference is
10 mm or less AND a rear axle housing to bump stop gap of 35 – 45 mm
is achieved, then continue to step 10.
10. Adjust the headlight aim.
Refer to TIS, applicable model and model year Repair Manual:

2023 Sequoia Hybrid:
Vehicle Exterior – Lighting (ext) – “Lighting (Ext): Headlight Assembly: Adjustment”

2022 – 2023 Tundra and Tundra Hybrid:
Vehicle Exterior – Lighting (ext) – “Lighting (Ext): Headlight Assembly: Adjustment”
11. Test-drive the vehicle to confirm the rough-ride condition is no longer present.
© 2022 Toyota Motor Sales, USA