T-TT-0538-19

Tech Tip T-TT-0538-19
Subject
April 23, 2019
Market
ABS Self Check Sound (Vehicle Characteristic)
USA
Service Category
Section
Brake
Brake Control/Dynamic Control System
Applicability
2018-2019 Sequoia
APPLICABLE VEHICLES
2018-2019
Sequoia
CONDITION
Customers may raise a concern of a clunk type noise coming from the engine compartment shortly
after start-up, due to repeated depressing of the brake pedal or shortly after the vehicle begins to
move.
RECOMMENDATIONS
This is normal operation, refer to page 306 in the Owner’s manual. (see below excerpt)
“A sound may be heard from the engine compartment when the brake pedal is depressed repeatedly,
when the engine is started or just after the vehicle begins to move. This sound does not indicate that a
malfunction has occurred in any of these systems.
Any of the following conditions may occur when the above systems are operating. None of these
indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.”
If the noise or phenomena being generated is something other than what is listed above, diagnosis
per the repair manual.
LINK REFERENCES
1.
2.
Toyota 2018 Sequoia Owner's Manual (OM0C011U)
Toyota 2019 Sequoia Owner's Manual (OM0C013U)
Expires on
Ver. 3.0 01/01/2019 T
04/23/2020
© 2019, Toyota Motor Sales, USA
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