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Service bulletins for the 2014 Toyota Highlander

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.

438 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
T-SB-0229-12_Rev2018-04-23. Service bulletin. ELECTRICAL SYSTEM. TSB: REVISION NOTICE November 22, 2017 Rev1: ? Applicability has been updated to include 2014 ? 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. In the event that a Toyota vehicle becomes submerged in water, many components may be physically damaged. Electrical and electronic components, including wiring harnesses, are particularly susceptible to corrosion and subsequent malfunction. Although any flooding can be damaging, salt water flooding elevates the potential for abnormal conditions and may increase risks due to its highly corrosive and conductive nature. Salt residue also continues to corrode and remain conductive even after a vehicle dries. This bulletin is intended to assist with safe handling and inspection of flood damaged vehicles and to provide basic guidance on likely needed repairs.
T-SB-0012-13 Rev2018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TSB: OBSOLETE NOTICE: September 14, 2016: This bulletin is now obsolete. Please see T-SB-0134-16.
T-SB-0027-15 OBS2018-04-02. Service bulletin. ELECTRICAL SYSTEM. TSB: OBSOLETE NOTICE: March 25, 2016: This bulletin is now obsolete. Please see T-SB-0023-16.
T-TT-0293-142018-04-02. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM:SOFTWARE. Tech Tip: Safety Connect is a vehicle option which requires a subscription fee for the system to be active. The first year of service is provided in the vehicle purchase price. Once the subscription has lapsed the DCM will be in an inactive state. In some instances, a DCM may need to be replaced even though the customer is not using the service.
T-SB-0012-13 Rev2018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. 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.
T-TT-0246-13 Rev2018-04-02. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM. Tech Tip: Tips for writing a DPR (Dealer Product Report) on manufacturing issues for windows and windshields.
T-SB-0006-14 Rev2018-04-02. Service bulletin. ELECTRICAL SYSTEM. TSB: Some 2014 model year applicable vehicles equipped with Entune? Audio (version 010169) / Entune? Audio Plus (version 010171) / Entune? Premium Audio (version 010185) may exhibit one or more of the following conditions: ? Bluetooth® sometimes disconnects with Android? phones ? Bluetooth® disconnects with iPhone® 4 when connected to USB ? Radio reboots with heavy radio load condition (e.g., dual map and POIs ON and Entune? Audio music ON and multiple destinations set) (Entune? Premium Audio only) ? Radio reboots after completing a navigation route by voice command system and pressing Talk Switch (Entune? Premium Audio only)
T-TT-0309-14 Rev2018-04-02. Service bulletin. ELECTRICAL SYSTEM. TT: Some customers may experience Bluetooth disconnections or loss of SMS text message functionality on the navigation/audio system with Android phones running OS 4.4 or later. Condition tends to occur to customers who have many previous text messages on their phones.
T-TT-0340-152018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TT: While accessing the repair manuals for models that have undergone a full model change starting with the 2013 RAV4, you may encounter disabled (i.e. greyed out) "INFO Button" links while browsing with Internet Explorer 10. You can identify the affected manuals by locating the adjustable Production Date Range, or PDR, drop downs above the navigation tree. Only repair manuals with these drop downs will be affected.
T-TT-0339-152018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TT: Some vehicles may exhibit an error message when trying to perform a radio software update: ?Unable to update the software. Please try again later.? If the following screen is seen; follow the directions below.
T-TT-0355-152018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. TechTip: Condition: Customers may experience connectivity issues when the following conditions are met: The customer?s iPhone is operating on iOS9 firmware The customer?s iPhone is connected to the vehicle via Bluetooth. If the vehicle is equipped with a Fujitsu-Ten brand head unit, the customer may complain of one or more of the following: When playing media via Bluetooth audio and pressing the ?Pause? button on the phone, media playback pauses for one second before resuming playback. Yelp searches return an error when search criteria includes a special character, e.g. !,$,#. If the vehicle is equipped with a Pioneer brand head unit, the customer may complain of one or more of the following: The customer?s iPhone does not support the album image feature. When playing media via Bluetooth audio, one or more of a number of play/pause issues occur.
T-SB-0160-14 Rev2018-04-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. TSB: Some 2014 model year applicable vehicles equipped with Entune? Audio (version 010169) / Entune? Audio Plus (version 010171) Entune? Premium Audio (version 01085) may exhibit one or more of the following conditions: Bluetooth® sometimes disconnects with Android? phones Bluetooth® disconnects with iPhone® 4 when connected to USB Radio reboots with heavy radio load condition (e.g., dual map and POIs ON and Entune? Audio music ON and multiple destinations set) (Entune? Premium Audio only) Radio reboots after completing a navigation route by voice command system and pressing Talk Switch (Entune? Premium Audio only)
T-TT-0118-11 Rev2018-04-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Technicians should confirm the following key points to minimize the potential for future MIL "ON" concerns after HV battery replacement.
T-TT-0268-132018-04-02. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. 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 they have restored their phone data/settings recently.
T-TT-0280-142018-04-02. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM. During Pre-Delivery Service (PDS), it is standard procedure (as outlined in the PDS check sheets) to verify that the Safety Connect system is in ?Shelled Mode? with a green LED illuminated prior to delivering the vehicle. Occasionally settings in the Data Communication Module (in-vehicle DCM), or on the network may prevent the ?Shelled Mode? status. In these potential cases, the vehicle is likely to be in ?Shipping Mode? and a red LED may be detected with or without a DTC.
T-SB-0006-14 Rev2018-04-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Some 2014 model year applicable vehicles equipped with Entune (version 010169) / Entune Plus (version 010171) / Entune Premium (version 010185) Audio may exhibit one or more of the following conditions. Bluetooth sometimes disconnects with Android phones. Bluetooth disconnects with iPhone 4 when connected to USB. Radio reboots with heavy radio load condition. Radio reboots after completing a navigation route by voice command system and pressing Talk Switch.
T-TT-0365-15 Rev2018-04-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: A vehicle may arrive to the dealer with a MIL ?ON? condition and P0A80 or P1AC000 stored in the memory. Some cases have been identified with internal modification done to the HV Battery. Modified or altered parts are not covered under warranty.
T-SB-0162-13_Rev2018-02-21. Service bulletin. HYBRID PROPULSION SYSTEM; ELECTRICAL SYSTEM. TSB: REVISION NOTICE January 05, 2018 Rev1: ? Applicability has been updated to include 2012 ? 2017 Camry HV and Prius C, 2015 ? 2017 Prius V, 2006 ? 2017 Highlander HV, 2010 ? 2016 Prius, and 2016 ? 2017 RAV4 HV model year vehicles. ? The Repair Procedure section has been updated. Any previous printed versions of this bulletin should be discarded. Some 2006 ? 2017 Highlander HV, 2010 ? 2016 Prius, 2012 ? 2017 Camry HV, Prius C and Prius V, and 2016 ? 2017 RAV4 HV model year vehicles used under certain severe operating conditions may exhibit an excessive buildup of dust, lint, or other debris in the HV battery cooling fan, which can reduce the efficiency of the HV battery cooling system. Follow the Repair Procedure in this bulletin to address this condition.
T-SB-0025-152017-08-14. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. TSB: While a vehicle is in inventory, the battery is subject to conditions that can reduce its performance and life. Batteries can become discharged due to an extended storage period, temperature, parasitic drain, or while demonstrating vehicle features and benefits in the sales process. Battery inspection and maintenance are required in order to ensure proper operation and optimal battery life. As described in this bulletin, operating the engine for 30 minutes after 60 days in storage and every 30 days thereafter will help to maintain battery State of Charge (SOC). This process supplements other movements of the vehicle as it is staged, and has specific restrictions on how maintenance is to be done. Also described in this bulletin are 2 other approved methods for maintaining battery State of Charge.
T-SB-0005-13 Rev2017-08-14. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TSB: Obsolete Notice November 2, 2015: This bulletin is now obsolete. Please see T-SB-0101-15
T-TT-0337-152017-08-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TT: When updating either the navigation or radio firmware, verify the vehicle applicability BEFORE beginning the update.
T-SB-0101-11 Rev2017-08-14. Service bulletin. ELECTRICAL SYSTEM. TSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many lubricants, cleaners, and automotive chemicals contain silicone or other compounds that may contaminate electrical contacts, and therefore increase electrical resistance and decrease switch performance. The use of any cleaners or fluids may increase the risk of further damage to electrical components.
T-TT-307-14 Rev12017-08-14. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TT: Customers complain of various Bluetooth connectivity concerns after upgrading to iOS 8.0 and later. Conditions typically experienced include inability to pair the iPhone to the system, poor sound quality during phone calls placed through the audio/navigation system, and the inability to place a hands free phone call using the audio/navigation system.
T-TT-0268-13 Rev2017-08-14. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE. 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.
TT-0307-14 Rev22017-08-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TT: Some customers may encounter various Bluetooth connectivity concerns after upgrading to iOS 8.0 and later. Conditions typically experienced include inability to pair the iPhone to the system, poor sound quality during phone calls placed through the audio/navigation system, and the inability to place a hands free phone call using the audio/navigation system.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.