Service bulletin JSD-Region Lette

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	10145741
Published by NHTSA	2018-10-15
Manufacturer's number	JSD-Region Lette
Manufacturer's date	2018-08-28
NHTSA component	POWER TRAIN; ELECTRICAL SYSTEM

NHTSA's summary

Region Letter: August 28,2018 The instructions for Option #1 have been corrected. An Electronic Control Unit (ECU) in the subject vehicles has improper programming that could lead a component in the Continuously Variable Transmission (CVT) to unnecessarily cycle and experience abnormal wear. If this component becomes damaged, the Malfunction Indicator Lamp (MIL) may illuminate in the instrument cluster and the vehicle could experience a reduction of speed. After reaching a pre-determined gear ratio, the vehicle can be operated up to approximately 37 mph.

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, Transmission and driveline

Vehicles listed
SCION IM	2016
TOYOTA COROLLA	2014, 2015, 2016, 2017
TOYOTA COROLLA IM	2017

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

Recalls for the same vehicles and component
2021723	2021-11-24. Electrical
2017363	2017-07-20. Electrical
2013352	2013-10-10. Electrical

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
T-SB-0058-23 Rev1	2025-07-10. Service campaign. The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks.
T-SB-0057-18	2023-06-26. Service bulletin. TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system.
T-SB-0003-22	2022-02-14. Service bulletin. TSB This Service Bulletin includes guidelines meant to help determine whether to repair or replace a wire harness assembly based on damage type. This Service Bulletin should be used in conjunction with the applicable model and model year Electronic Wiring Diagram (EWD) and/or Repair Manual.
JSD-082118	2021-06-14. Service bulletin. An electric control unit has improper programming.
J0D-032818	2021-06-14. Service bulletin. Transmission has improper programming.
T-TT-0578-19 Rev	2020-11-23. 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.
T-TT-0553-19 Rev	2020-08-24. Service bulletin. TT: The new DCA-8000 Diagnostic Charger may cause your facility?s Ground Fault Circuit Interrupter (GFCI) breaker to trip. A GFCI breaker can be tripped for various reasons, one of the reasons may be related to the DCA-8000. We are investigating this issue to determine the root cause. Other reasons the GFCI breaker may trip ?Circuit demand is too high for GFCI rating ?Worn out GFCI internal contacts ?Improper installation or wiring of GFCI breaker
T-SB-0003-19 Obs	2020-04-13. Service bulletin. TSB: OBSOLETE NOTICE March 10, 2020: This bulletin is now obsolete. Please see T-SB-0024-20.
T-SB-0024-20	2020-04-13. Service bulletin. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0003-19. ?The Introduction and Software Update Information sections have been updated. Service Bulletin No. T-SB-0003-19 is obsolete and any printed versions should be discarded. Some 2016 model year vehicles equipped with Entune? Audio (version UU.11.13), Entune? Audio Plus (version EU.20.21), or Entune? Premium Audio (CU.20.22) or older may exhibit one or more of the following conditions: ?Bluetooth® audio information is missing from instrument cluster MID ?Long street names are not indicated when using turn-by-turn directions ?Abnormal navigation routing ?Toyota Park Assist Settings button displays in the Settings menu ?System is unable to call phone numbers with ?-? present in the number ?System is unable to send SMS via the Quick Message feature ?Abnormal Bluetooth® audio playback when inserting and removing the iPhone® USB cable from the USB port ?System is unable to play audio from iPhone® connected via USB when two phones are connected via Bluetooth® at the same time ?Browse button operates intermittently in Bluetooth® audio ?Screen flickers when switching between day and night modes ?Abnormal Pandora Internet Radio operation when switching between two iPhones ?Unit reboots intermittently ?Diagnostic Trouble Code (DTC) U1110 or B15E6 is present ?Diagnostic screen displays intermittently ?Weather Map is inoperative ??Unable to connect to server? displays when using voice recognition and searching for ?IHOP? ?Panoramic view monitor operates abnormally
T-SB-0117-19_Rev	2020-01-27. Service bulletin. TSB: REVISION NOTICE December 02, 2019 Rev1: ? The bulletin title and Software Update section have been updated. Any previous printed versions of this bulletin should be discarded. Some 2014 model year Corolla vehicles equipped with Entune? Audio (version BU.26.42) or Entune? Premium Audio (version AU.26.61) may exhibit one or more of the following conditions. ? Apps screen displays after reroute (Entune? Premium Audio only) ? Voice command system freezes during phonebook transfer ?Voice command system freezes when radio is in XM mode ? Bluetooth® is inoperative while using Apps ? Sent SMS message continually appears on display audio for BlackBerry® devices (Q10 and Z10)