Service bulletin T-TT-0352-15

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10132528
Published by NHTSA	2018-04-02
Manufacturer's number	T-TT-0352-15
Manufacturer's date	2015-08-20
NHTSA component	LANE DEPARTURE

NHTSA's summary

TechTip: In some cases, combination meters may automatically initialize for options detected on a specific vehicle. If a meter is exchanged between vehicles for diagnostic purposes, it may become unusable in the original vehicle. For example, if a combination meter is removed from a vehicle not equipped with LDA (Lane Departure Alert) and temporarily installed in a vehicle equipped with LDA, it may display ?CHECK LDA SYSTEM? on the multi-information display and set DTC U023A when reinstalled in the original vehicle. This condition cannot be reset, and the combination meter must be replaced.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Driver assistance

Trouble codes named

U023A

Vehicles listed
TOYOTA HIGHLANDER	2014, 2015, 2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
TTT063620	2022-06-21. Service bulletin. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions
T-SB-0088-21	2021-11-15. Service bulletin. TSB: For proper calibration of the millimeter wave radar sensor, the vehicle and radar target must be on a level surface with a consistent plane. If a level surface with a consistent plane is not available, use the Floor Slope Compensation Procedure in this service bulletin in conjunction with the appropriate model and model year Repair Manual instructions when adjusting the millimeter wave radar sensor.
T-TT-0636-20 Rev	2021-04-19. Service bulletin. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.
T-TT-0636-20	2021-02-16. Service bulletin. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.
T-TT-0603-20	2020-04-20. Service bulletin. TT: For proper calibration of the millimeter wave radar sensor, the vehicle must be on a level surface. If a level surface is not available, this tech tip should be used in conjunction with the repair manual to set the angle of the front millimeter wave radar sensor and reflector height before performing beam axis adjustment.
T-TT-0352-15	2018-04-23. Service bulletin. TechTip: In some cases, combination meters may automatically initialize for options detected on a specific vehicle. If a meter is exchanged between vehicles for diagnostic purposes, it may become unusable in the original vehicle. For example, if a combination meter is removed from a vehicle not equipped with LDA (Lane Departure Alert) and temporarily installed in a vehicle equipped with LDA, it may display ?CHECK LDA SYSTEM? on the multi-information display and set DTC U023A when reinstalled in the original vehicle. This condition cannot be reset, and the combination meter must be replaced.
T-TT-0010-10 Rev	2018-04-02. Service bulletin. Tech Tip: Low battery voltage can contribute to a MIL "ON" condition for P0335 (Crankshaft Position Sensor Circuit) and/or P0340 (Camshaft Position Sensor Circuit) due to inconsistent rotational speed of the engine's crankshaft.
T-SB-0016-16 Rev	2018-04-02. Service bulletin. TSB: Revision Notice: Production Change Information section has been updated. Any previous printed versions of this bulletin should be discarded. Some 2014 model year Highlander and Highlander HV vehicles may exhibit an abnormal noise, like a ?squeak/squawk/groan? type noise, from the rear suspension when traveling over uneven roads which may become more pronounced in colder ambient temperatures. The abnormal noise may be caused by the Rear Trailing Arm bushing. An updated Rear Trailing Arm Assembly is available. Follow the Repair Procedure in this bulletin to address this condition.