Service bulletins for the 2020 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.
236 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| T-TT-0588-19_Rev | 2020-03-30. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. TT: Some 2020 model year vehicles may display abnormal Safety Connect operation during PDS or after replacement due to DCM activation issues. If there are no DTCs present and after the initial SOS light flashing sequence after ignition on, neither the red nor green light stays on in the overhead console determine if the vehicle is in shipping mode. To determine if a vehicle is experiencing this condition, connect a Techstream and navigate to: Telematics-Data List - ?Telematics Activation Status?. If this value is displayed as ?Shipping?, continue to the Shipping Mode recommendations below, and do not create a TAS case. |
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| T-TT-0528-19_Rev | 2020-03-30. Service bulletin. WHEELS. TT: Some 2014-2020 model year Highlander and Highlander HV vehicles are equipped with alloy wheels that are clad with a plastic cover. Use of a heat gun to facilitate removal of stick-on wheel weights may damage the coating on the cladding and cause it bubble and/or peel off |
| T-TT-0594-20_Rev | 2020-03-30. Service bulletin. EQUIPMENT:ELECTRICAL. TT: Some vehicles equipped with Dynamic Navigation may experience a pop-up message notifying them that their map update service will end soon. The date that is shown could be more than one year in the future. This does not indicate any issues with the vehicle, and is only informing the user of the expiration date. |
| Safety Recall an | 2020-03-30. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements |
| T-SB-0164-19_Rev | 2020-03-30. Service bulletin. STRUCTURE; ELECTRICAL SYSTEM. TSB: Pre-Delivery Service (PDS) is a critical step in satisfying our 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. - Interior cleanliness. - Proper function of mechanical systems. Customer retention and proper maintenance of vehicles are and have always been a major focus for Toyota. To help remind customers that regular service is essential to the proper maintenance of the vehicle, dealers are required to install a service reminder sticker before delivery. By doing this, customers will be reminded to return to your dealership for service. Your current service reminder sticker may be used. (See PDS Check Sheet ?Final Inspection and Cleaning.?) A new PDS Check Sheet has been developed for the 2020 model year Highlander and Highlander HV. Some check points have been added, expanded, or clarified. |
| T-SB-0008-19_Rev | 2020-03-30. Service bulletin. EQUIPMENT. An initialization procedure is required to activate the Entune? 3.0 App Suite Connect for Audio, Audio Plus, and Premium Audio head units before they are used for the first time on new vehicles. The initialization procedure may also be performed under other circumstances, such as following a head unit replacement or after the customer?s personal settings are erased. The initialization procedure requires between 3 and 15 minutes to complete, depending on file size, cellular connection speed, and other factors. Connection to a wireless network is recommended for optimal functionality when downloading software via a smartphone. Download the latest Entune? 3.0 smartphone app on a smartphone. Following the initialization procedure, individual Entune? 3.0 apps may periodically update through an over-the-air update system. Updates are optional or mandatory. The update procedure will take approximately 1 minute for each app requiring an update. Follow the Initialization/Update Procedure in this bulletin to perform the initialization and app updates |
| T-TT-0594-20 | 2020-02-24. Service bulletin. EQUIPMENT. TT: Some vehicles equipped with Dynamic Navigation may experience a pop-up message notifying them that their map update service will end soon. The date that is shown could be more than one year in the future. This does not indicate any issues with the vehicle, and is only informing the user of the expiration date. |
| T-TT-0593-20 | 2020-02-24. Service bulletin. EQUIPMENT. TT: Some customers may experience the Remote Connect becoming inoperative when attempting to send commands to the vehicle. To simplify the diagnosis of this system and prevent the unnecessary replacement of parts, please refer to the procedure below. |
| T-TT-592-20 | 2020-02-24. Service bulletin. SUSPENSION. TT: Alignment specifications for the 2020 Highlander and Highlander HV have been updated and are significantly different from the previous model. |
| T-TT-0520-19_Rev | 2020-02-18. Service bulletin. EQUIPMENT. TT: In certain cases of leaking air conditioning systems, the root cause of the leak is inadvertently overlooked, causing a repeat repair. To improve customer satisfaction and repair A/C system leaks in one dealer visit, Toyota has developed a set of guidelines for evaluating A/C system components. |
| T-SB-0009-19_Rev | 2020-02-18. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE January 22, 2020 Rev1: ? The Battery subsection has been updated. Any previous printed versions of this bulletin should be discarded. Long-term or off-site storage requires special care to keep vehicles factory fresh and ready for delivery. The following guidelines should be performed to minimize vehicle component/part degradation due to extended vehicle storage conditions. Long-term storage can affect a vehicle?s systems and components. Any problems that are found should be corrected immediately. |
| T-SB-0006-19_Rev | 2020-02-18. Service bulletin. ELECTRICAL SYSTEM. TSB: REVISION NOTICE January 15, 2020 Rev2: ? The entire bulletin has been updated. February 11, 2019 Rev1: ? The Introduction and Every Two Months sections have been updated. Any previous printed versions of this bulletin should be discarded. Hybrid vehicles are equipped with two types of batteries: ? Hybrid Vehicle (HV) battery ? Auxiliary (12V) 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. Perform the following maintenance service for the HV battery and auxiliary battery. NOTE ? BEFORE disconnecting the auxiliary battery, confirm the shift lever is in the ?P? position and apply the parking brake completely. The shift lever CANNOT be shifted from the ?P? position with the auxiliary battery disconnected. ? If the negative (?) terminal of the auxiliary battery is reconnected, even if the vehicle is powered ON (Ready ON), the hybrid system may NOT start. In this case, depress the brake pedal and press the Power button to start the hybrid system (the Ready light is ON). If the hybrid system still does NOT start (the Ready light is OFF), refer to the Repair Manual. |
| T-TT-0593-20_Rev | 2020-02-18. Service bulletin. ELECTRICAL SYSTEM. TT: Some customers may experience the inability to activate Remote Connect or Remote Connect becoming inoperative when attempting to send commands to the vehicle. To simplify the diagnosis of this system and prevent the unnecessary replacement of parts, please refer to the procedure below. |
| T-TT-0580-19_Rev | 2020-02-18. Service bulletin. POWER TRAIN. TT: Currently under investigation. Please contact TAS if you have a vehicle that exhibits a leak from the Transmission Side Cover with no signs of damage or other conditions unrelated to regardless of miles or months in service. If it?s a Sunday or holiday continue with diagnosis and repair, save all parts and details, contact TAS on the next available work day and review details with TAS engineer. |
| T-SB-0008-20 | 2020-02-18. Service bulletin. EQUIPMENT. TSB: Vehicles may display evidence of a fluid leak or fluid seep from powertrain components. This bulletin explains how to determine the differences between a fluid leak versus a fluid seep. Cases that are determined to be a ?leak? should be repaired accordingly and will be covered under warranty if applicable. Cases that are determined to be a ?seep? should be documented on the repair order and inspected at the next service interval. Follow the Repair Information in this bulletin to determine if the concern in question is a fluid leak or fluid seep and review the Repair Procedure section to address the condition. NOTE This bulletin applies to ALL powertrain fluids excluding fuel and coolant. |
| T-SB-0007-19_Rev | 2020-02-18. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE January 24, 2020 Rev1: ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. A battery in a stored vehicle is subject to conditions that can reduce its performance and service 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 ensure proper 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 SOC and recharge, if necessary, no more than 48 hours before to customer delivery. |
| T-SB-0164-19 | 2020-01-27. Service bulletin. STRUCTURE; ELECTRICAL SYSTEM. TSB: Pre-Delivery Service (PDS) is a critical step in satisfying our 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. ? Interior cleanliness. ? Proper function of mechanical systems. Customer retention and proper maintenance of vehicles are and have always been a major focus for Toyota. To help remind customers that regular service is essential to the proper maintenance of the vehicle, dealers are required to install a service reminder sticker before delivery. By doing this, customers will be reminded to return to your dealership for service. Your current service reminder sticker may be used. (See PDS Check Sheet item 8 of ?Final Inspection and Cleaning.?) A new PDS Check Sheet has been developed for the 2020 model year Highlander and Highlander HV. Some check points have been added, expanded, or clarified. Bulletins are available for items in bold. |
| T-SB-0047-19_Rev | 2020-01-13. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE December 13, 2019 Rev1: ? Applicability has been updated to include several 2020 model year Toyota vehicles. ? The Required Tools & Equipment section has been updated. Any previous printed versions of this bulletin should be discarded. Some 2018 ? 2020 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software. The SST is used with applicable vehicles to deliver the update; however, the process for generating license keys differs from previous generations. Before attempting to perform a map update, the head unit?s expiration date must be checked. If the expiration date is still valid, a license key may be generated without the use of an activation card number. Updating the maps without the use of an activation card number is considered an Embedded Navigation Update (refer to pg. 9) and performing this process does not extend the duration of telematic map services. If the head unit?s expiration date is expired, or is expiring within the next 90 days, it should be recommended to the customer to purchase an activation number. Utilizing an activation number will initiate a Dynamic Navigation Update (refer to pg. 3). This Dynamic Navigation Update will perform the Embedded Navigation Update and provide telematic map services for a period of two years from the day that the Dynamic Navigation Update is performed. Activation card numbers are provided in an activation card number pamphlet available through the normal parts ordering system. Follow the process in this bulletin to perform the update. |
| T-TT-0580-19 | 2019-12-16. Service bulletin. POWER TRAIN. TT: Some 2018-2020 model year UA80/UB80 transmission equipped models may experience a leak from the Transmission Side Cover. This issue is currently under investigation. Vehicles are being sought regardless of months in service or mileage. Only seeking vehicles with leaking transmissions with no other signs of damage to the side cover. |
| T-TT-0442-17_Rev | 2019-12-16. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TT: Safety Connect is a vehicle option which requires a subscription fee for the system to be active after the initial trial period. Once the subscription has expired the DCM (Telematics Transceiver) 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. If registration of the replacement DCM part is attempted using the Techstream utility after the account has become inactive, the registration will fail, and messages such as ?ATX webserver is Down? or ?ATX error? will be displayed. |
| T-TT-0578-19 | 2019-12-02. Service bulletin. STEERING. 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 | 2019-09-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. 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-0158-18-Rev | 2019-09-03. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. TSB: REVISION NOTICE July 03, 2019 Rev1: ? Applicability has been updated to include 2020 model year Supra vehicles. ? The Hook and Loop Style section has been added. Any previous printed versions of this bulletin should be discarded. 2020 model year Toyota vehicles are equipped with driver side floor mat retainers to secure the floor mat in the correct position. In addition, some models may also utilize retainers for passenger side and rear seat floor mats. During Pre-Delivery Service (PDS), follow the appropriate Installation Procedure to attach the driver side, and if applicable, the passenger side and rear seat floor mats to the vehicle carpet using the floor mat retainers. If installation instructions are included in the floor mat kit, place the instructions in the vehicle?s glove box for customer reference. CAUTION ? ALWAYS verify the floor mat is designed specifically for the model and model year it is being installed in. ? ONLY use floor mats that can be secured using the retainers. ALL OEM Toyota floor mats are specifically designed to fit correctly and be secured using the retainers. ? Make sure the floor mat is properly placed on the vehicle carpet and secured with the retainers. If the driver side floor mat is NOT properly placed and secured, it could slip and interfere with the movement of the pedals during driving and may cause an accident. ? Verify the operation of the accelerator, brake, and clutch (if equipped) pedals and clearance to the mat. ? NEVER install more than one floor mat at a time in the driver?s seating position. ? If applicable, ANY secondary set of floor mats (based upon customer preference, such as the all-weather floor mats or other floor mats) MUST be placed in the trunk with ALL the packaging material intact. Do NOT install the secondary mat on top of the primary floor mat already installed in the driver?s seating position. |
| T-SB-0134-16-Rev | 2019-09-03. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM; ENGINE. TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections have been updated. October 30, 2017 Rev1: ? Applicability has been updated to include 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0012-13. Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. Flash reprogramming allows the Electronic Control Unit (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. NOTE ECU is a Toyota term used to describe integrated computerized devices responsible for managing the operation of a system or subsystem. For the purposes of this bulletin, the term ?ECU? is used as a generic label for the following SAE J1930 standard references: ? Powertrain Control Module (PCM) ? Engine Control Module (ECM) ? Transmission Control Module (TCM) ? Any other Toyota specific control unit |
| T-TT-0549-19 | 2019-07-15. Service bulletin. ELECTRICAL SYSTEM. TT: The new 12V Battery Warranty Testers (DSS-5000 & DCA-8000) require certain information to generate a test result and warranty code. Below is an explanation of what information is required when testing a 12V battery on the new Warranty Battery Testers. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.