WenmarOpen by Wenmar Pro

Service bulletin L-TT-0172-15

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)
TypeService bulletin
NHTSA id10111341
Published by NHTSA2017-08-14
Manufacturer's numberL-TT-0172-15
Manufacturer's date2015-01-05
NHTSA componentEQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

TT: Techstream Health Check Results screenshots "Yes" for a Telematics ECU (DCM) Calibration update regardless of whether a calibration update is available or not. The issue is related to the Techstream software and will be corrected in a future Techstream software release.

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

Electrical system, Equipment and accessories, Software

Vehicles listed
LEXUS CT HYBRID2011 to 2015
LEXUS ES HYBRID2013 to 2015
LEXUS ES3502010 to 2015
LEXUS GS 3502010 to 2011
LEXUS GS 3502013 to 2015
LEXUS GS HYBRID2010
LEXUS GS HYBRID2013
LEXUS GS450H2011
LEXUS GS450H2014 to 2015
LEXUS GS4602010 to 2011
LEXUS GX4602010 to 2015
LEXUS HS 250 HYBRID2010 to 2012
LEXUS IS 2502010 to 2015
LEXUS IS 250C2010 to 2015
LEXUS IS 3502010 to 2015
LEXUS IS 350C2010 to 2015
LEXUS IS F2010 to 2014
LEXUS LFA2012
LEXUS LS4602010 to 2015
LEXUS LS600H2010 to 2015
LEXUS LX5702010 to 2011
LEXUS LX5702013 to 2015
LEXUS NX HYBRID2015
LEXUS NX200T2015
LEXUS RC 3502015
LEXUS RC F2015
LEXUS RX HYBRID2011 to 2015
LEXUS RX3502010 to 2015
LEXUS RX450H2010

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
LSB002514A2021-12-20. Service bulletin. Immobilizer and Smart Key Reset
LSB0025142021-12-20. Service bulletin. Immobilizer and Smart Key Reset.
KLG_19LE05-TI-Up2020-09-14. Service bulletin. TI: TECHNICAL INSTRUCTIONS FOR LIMITED SERVICE CAMPAIGN KLG CUSTOMER SUPPORT PROGRAM 19LE05 SAFETY CONNECT SYSTEM ? VEHICLE LOCATION INACCURATE
L-TT-0221-17_Rev2019-05-13. Service bulletin. TT: Some customers may encounter Bluetooth® connectivity concerns such as: ? Difficulty to pair the phone. ? Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ? Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as ability to change the track using the steering wheel controls. These concerns can be caused by changes made on the customer?s phone. Make sure to inquire with the customer if the connectivity concerns occurred after receiving an operating system update on their phone or if they have restored their phone data/settings recently.
L-TT-0172-152018-04-23. Service bulletin. TT: Techstream Health Check Results screen shows "Yes" for a Telematics ECU (DCM) Calibration update regardless of whether a calibration update is available or not. The issue is related to the Techstream software and will be corrected in a future Techstream software release.
L-SB-0015-10 Rev2018-04-23. Service bulletin. Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream ECU flash reprograming process and outlines use of the TIS and the CUW.
L-SB-0083-13 Rev2018-04-02. Service bulletin. TSB: OBSOLETE NOTICE October 5, 2016: This bulletin is now obsolete. Please see L-SB-0086-16.
L-SB-0021-142018-04-02. Service bulletin. TSB: Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream ECU flash reprogramming process and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard (CUW). Flash calibration updates can only be applied to the vehicle/ECU combination for which they are intended. ECUs have internal security that will not allow them to be programmed with another ECU?s information.
L-TT-0172-152018-04-02. Service bulletin. TT: Techstream Health Check Results screen shows "Yes" for a Telematics ECU (DCM) Calibration update regardless of whether a calibration update is available or not. The issue is related to the Techstream software and will be corrected in a future Techstream software release.
L-TT-0121-132018-04-02. Service bulletin. MY 2013 Gen 7 navigation systems use a USB SST to update the firmware and map. MY 2014 IS and GX models incorporate a Gen 8 navigation system that uses a USB stick to update the firmware ONLY. Refer to the chart below for a comprehensive list of all current and previously issued USB SSTs and their applicability.