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Service bulletins for the 2016 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.

284 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-TT-0360-152018-04-23. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TT: 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. The customer may complain of the following issues: When receiving two incoming calls simultaneously, both calls are ended automatically. iTunes Radio app does not play via Bluetooth audio. Podcast and Audiobook media playback is inoperative via Bluetooth audio.
T-TT-0381-162018-04-23. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Tech Tip: Some customers may experience difficulty programming HomeLink.
TSB-0012-13 Rev22018-04-23. Service bulletin. ENGINE; 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-0399-162018-04-23. Service bulletin. ELECTRICAL SYSTEM. TT: Multimedia systems reset procedure should be performed when the multimedia system no longer responds or reboots itself.
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-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-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-0027-14 Rev2018-04-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TSB: Hybrid vehicles are equipped with 2 types of batteries: ? Hybrid Vehicle (HV) battery ? 12-volt auxiliary battery If the hybrid vehicle is put into storage, the state of charge (SOC) of its HV battery and auxiliary battery will gradually decrease. To prevent the auxiliary battery from becoming discharged during storage, proper maintenance is necessary. Please perform the following maintenance service for the HV battery and 12-volt auxiliary battery
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-0112-152017-08-14. Service bulletin. EQUIPMENT:MECHANICAL; STRUCTURE; ELECTRICAL SYSTEM. TSB: Pre-Delivery Service (PDS) is a critical step in satisfying your dealership's new car customers. Customer feedback indicates the following areas deserve special attention when performing PDS: ? Careful inspection for paint chips/scratches and body dents/dings. ? Proper operation of electrical accessories (including interior light, clock, and radio reset). ? Interior cleanliness. ? Proper function of mechanical systems. Customer retention and proper maintenance of vehicles has been a major focus for Toyota. To help remind customers that regular oil changes are essential to the proper maintenance of their vehicle, dealers are required to begin installing a first oil change reminder sticker prior to delivery. By doing this, customers will be reminded to return to your dealership for their first oil change. Your current oil change reminder sticker may be used. (See PDS Check Sheet item 8 of "Final Inspection & Cleaning.")
T-SB-0111-152017-08-14. Service bulletin. EQUIPMENT:MECHANICAL; ELECTRICAL SYSTEM; STRUCTURE. TSB: Pre-Delivery Service (PDS) is a critical step in satisfying your dealership"s new car customers. Customer feedback indicates the following areas deserve special attention when performing PDS: ? Careful inspection for paint chips/scratches and body dents/dings. ? Proper operation of electrical accessories (including interior light, clock, and radio reset). ? Interior cleanliness. ? Proper function of mechanical systems. Customer retention and proper maintenance of vehicles has been a major focus for Toyota. To help remind customers that regular oil changes are essential to the proper maintenance of their vehicle, dealers are required to begin installing a first oil change reminder sticker prior to delivery. By doing this, customers will be reminded to return to your dealership for their first oil change. Your current oil change reminder sticker may be used. (See PDS Check Sheet item 8 of "Final Inspection & Cleaning.")
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-TT-0344-152017-08-14. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE. TT: iPhone text messages do not appear on multimedia display.
T-SB-0012-13 REV2017-03-21. Service bulletin. ENGINE; ELECTRICAL SYSTEM. "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-SB-0124-152017-03-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. "A BATTERY IN A STORED VEHICLE IS SUBJECT TO CONDITIONS THAT CAN REDUCE ITS PERFORMANCE AND LIFE. THESE CONDITIONS INCLUDE STORAGE PERIOD, TEMPERATURE, PARASITIC DRAIN, AND BATTERY LOAD. BECAUSE OF THESE FACTORS, BATTERY INSPECTION AND MAINTENANCE ARE REQUIRED IN ORDER TO ENSURE PROPER OPERATION AND OPTIMAL BATTERY LIFE. AS A MATTER OF POLICY, TOYOTA DOES NOT PROVIDE BATTERY WARRANTY COVERAGE FOR DISCHARGED AND/OR FAILED BATTERIES DUE TO LACK OF MAINTENANCE. IT IS THE DEALER’S RESPONSIBILITY TO MAINTAIN THE SPECIFIED STATE OF CHARGE (SOC) OF THE VEHICLE’S BATTERY WHILE IN STOCK AND ASSURE PROPER STATE OF CHARGE (SOC) AT DELIVERY. TO ELIMINATE CUSTOMER SERVICE CONCERNS DUE TO AN UNDERCHARGED BATTERY DURING THE FIRST FEW WEEKS OF OWNERSHIP, ALL DEALERS SHOULD CHECK BATTERY STATE OF CHARGE (SOC) AND RECHARGE, IF NECESSARY, WITHIN 48 HOURS OF DELIVERY TO CUSTOMERS."
T-SB-0119-152017-03-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. TSB: THIS BULLETIN INCLUDES BASIC PROCEDURES FOR PERFORMING A RESCUE CHARGE ON NI-MH HIGH VOLTAGE (HV) BATTERIES. THIS BULLETIN SHOULD BE USED IN CONJUNCTION WITH THE REPAIR MANUAL WHILE PERFORMING RESCUE CHARGE. THE GRX-5100 SHOULD BE USED WHEREVER THE REPAIR MANUAL REFERENCES THE TOYOTA HYBRID SYSTEM (THS) CHARGER.
T-TT-0385-162017-03-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. "TECH TIP: THIS TECH TIP IS BEING PROVIDED TO BRING ATTENTION TO THE NEW LOCATION OF THE ENTUNE/NAV/MAP UPDATE AND UPGRADE USB DIRECTORY. CLICK ON THE TIS TAB, DIAGNOSTICS TAB, TELEMATICS TAB, AND THE DOCUMENT IS NOW LOCATED UNDER THE REFERENCE DOCUMENTS SECTIONS. THIS CHANGE HAS OCCURRED TO HELP SPEED UP THE UPDATING PROCESS OF THIS DOCUMENT. "
T-TT-0395-162017-02-23. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. TT: HV BATTERIES HAVE LIQUID FILLED CELL MODULES, TO PREVENT LEAKAGE FROM CELLS, IT IS VERY IMPORTANT TO CONFIRM THE PROPER ORIENTATION MARK OF THE DRC.
T-TT-0392-16 REV2017-02-23. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. TT: SOME CUSTOMERS MAY EXPERIENCE BLUETOOTH CONNECTION ISSUES AFTER UPDATING THE ANDROID OPERATING SYSTEM TO 5.X.X (LOLLIPOP) OR LATER.
T-SB-0198-11 REV2017-01-05. Service bulletin. ELECTRICAL SYSTEM; HYBRID PROPULSION SYSTEM. TSB: FOR VEHICLES THAT ARE USED UNDER CERTAIN SEVERE OPERATING CONDITIONS, THE HV BATTERY COOLING FAN MAY EXPERIENCE AN EXCESSIVE BUILDUP OF DUST, LINT, OR OTHER DEBRIS THAT CAN REDUCE THE EFFICIENCY OF THE HV BATTERY COOLING SYSTEM. HV BATTERY COOLING FAN MAINTENANCE AND CLEANING SHOULD BE PERFORMED TO ADDRESS THIS CONDITION.
T-SB-0103-162016-11-16. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TSB: SOME 2016 MODEL YEAR APPLICABLE VEHICLES EQUIPPED WITH ENTUNE™ AUDIO (VERSION 01013E) / ENTUNE™ AUDIO PLUS (VERSION 010156 OR 01015C) / ENTUNE™ PREMIUM AUDIO (VERSION 010171 OR 010170 OR 01017D) MAY EXHIBIT ONE OR MORE OF THE FOLLOWING CONDITIONS: *HEAD UNIT REBOOTING AT A SPECIFIC LOCATION. *ABNORMAL DESTINATION SEARCH OPERATION. *REBOOTING CAUSED BY NO SONGS ON THE USB CONNECTED IPHONE. *ONE TIME REBOOT AFTER ACC-ON. *AUDIO STAYS MUTED AFTER THE KEY IS CYCLED.

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