2020 Toyota Highlander Technical Service Bulletins

186 technical service bulletins (TSBs) are on record for the 2020 Toyota Highlander. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10198104May 3, 2021Equipment, Electrical system. TSB: Some 2020 ? 2021 model year vehicles equipped with Audio, Audio Plus, or Premium Audio (versions 1784) or earlier may exhibit one or more of the following conditions: ?Intermittent blank screen. ?Navigation map update fails. ?Album art inoperative. ?Pause function intermittently inoperative in CD mode. ?Intermittent DTC B15FE present. ?Abnormal energy flow screen appearance on Hybrid models. ?Abnormal phone…
• 10190461Mar 22, 2021Equipment. TSB: This Service Bulletin provides a procedure to properly perform the Techstream ?Control the Injection Mode? active test in some 2016 ? 2021 model year Toyota vehicles equipped with an FKS engine.
• 10190460Mar 17, 2021Air bags. Toyota Safety Recall and Service Campaign - Technician Certification Requirements
• 10190453Mar 12, 2021Back-over prevention (rear camera), Brakes. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.
• 10190448Mar 5, 2021Seats. TSB: Some 2010 ? 2021 model year Toyota vehicles may exhibit paint stains after the removal of Rapgard?. The paint stains may appear to be under the clear coat but are usually under wrinkles in the Rapgard?. The wrinkles may trap water and cause the paint to stain from the trapped moisture, especially on horizontal surfaces such as the hood, roof, and trunk. Follow the Repair Procedure in this bulletin to address…
• 10188913Feb 3, 2021Equipment. TSB: Replacement certification labels (the vinyl label installed on the driver door or door post) and VIN plates (the metal plate riveted to dashboard) (see Figure 1) for most 1979 ? 2021 model year vehicles may be available provided the requests meet the criteria listed in this Service Bulletin. Follow the Procurement Procedure in this bulletin to request a replacement certification label or VIN plate.
• 10187264Jan 20, 2021Back-over prevention (rear camera). TT: Vehicle control apps might not operate as expected at times due to preconditions (normal operating parameters) not being established, vehicle settings and/or network/cellular coverage concerns.
• 10187274Jan 5, 2021Seat belts, Back-over prevention (rear camera). TSB: Some 2020 ? 2021 model year Tundra vehicles equipped with Audio Plus (version 1186) or earlier may exhibit one or more of the following conditions: ?WiFi intermittently inoperative. ?DTC B15DB present. ?Changing the Auto Relock Timer setting also changes the Remote 2-Press unlock setting. Some 2020 ?
• 10185762Dec 22, 2020Brakes, Back-over prevention (rear camera). TSB: Some 2020 model year Highlander and Highlander Hybrid vehicles may experience a sudden loss of air conditioning cooling with Diagnostic Trouble Code (DTC) B1423 (Open in Pressure Sensor Circuit/Abnormal Refrigerant Pressure) present. Follow the Repair Procedure in this bulletin to address these conditions.
• 10185760Dec 17, 2020Electrical system, Brakes, Equipment. TSB: Some 2020 model year vehicles equipped with Audio Plus (version 1060) or Premium Audio (version 1060) or earlier may exhibit the following concern: ?Distorted screen when using Apple CarPlay® while making a hands-free phone call. Some 2020 model year vehicles equipped with Audio Plus (version 1021) or Premium Audio (version 1021) or earlier may exhibit one or more of the following conditions: ?Barge in…
• 10187241Dec 14, 2020Back-over prevention (rear camera), Brakes. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.
• 10186195Dec 14, 2020Brakes. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.
• 10185788Dec 11, 2020Equipment. OBSOLETE NOTICE December 11, 2020: This bulletin is now obsolete. Please see T-SB-0119-20.
• 10184549Nov 13, 2020Equipment, Electrical system. TT: Some vehicles may experience an issue related to the DCM, the following information is consolidating the available diagnostic information in one document.
• 10184539Nov 2, 2020Electrical system, Equipment. TSB: This bulletin includes basic procedures for performing an at battery rescue charge on high voltage (HV) Ni-MH and Li-ion batteries. This bulletin should be used in conjunction with the applicable model and model year Repair Manual while performing the battery rescue charge. The GRX-5100 should be used wherever the Repair Manual references the Toyota Hybrid System (THS) charger.
• 10183281Oct 21, 2020Engine cooling. TT: HVAC drain tube is found to be blocked/clogged.
• 10183272Oct 18, 2020Electrical system. TSB: Some 2020 model year Highlander vehicles may exhibit a shift flare condition during wide open throttle (WOT) acceleration from 40 ? 60 mph and during the upshift from 2nd to 3rd. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition. Follow the Repair Procedure in this bulletin to address this condition.
• 10183188Oct 16, 2020Equipment, Engine cooling. TSB: This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 ? 2021 model year Toyota vehicles.
• 10182983Oct 12, 2020Equipment, Electrical system, 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…
• 10182982Oct 9, 2020Equipment. 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…
• 10182969Oct 6, 2020Electrical system, Equipment. TSB: Some 2020 model year vehicles equipped with Audio Plus (version 1021) or Premium Audio (version 1021) or earlier may exhibit one or more of the following conditions: ?Barge in function defaulted to OFF. ?Limited phone book grammar. ?Difficult Hand Free operation. ?Abnormal Electronic Owner?s Manual operation ?Music does not automatically resume when using Android Auto?. ?Cover art is not displayed. ?Vehicle…
• 10181786Sep 1, 2020Equipment, Electrical system. TSB: Some 2020 model year Toyota vehicles equipped with JBL amplifiers may exhibit no sound in all modes, an intermittent loud popping noise, and/or static noise coming from the speakers. Updated amplifiers are available through the exchange program to address this condition. Follow the Repair Procedure in this bulletin to address this condition.
• 10179791Aug 31, 2020Engine cooling, Equipment. TT: Any HVAC repair requiring reassembly of the quick connect fitting between the suction hose sub-assembly and the suction pipe sub-assembly located at the top right of the engine compartment.
• 10179747Aug 31, 2020Equipment. TT: Any HVAC repair requiring reassembly of the quick connect fitting between the suction hose sub-assembly and the suction pipe sub-assembly located at the top right of the engine compartment.
• 10179786Aug 27, 2020Body and structure, Equipment. TT: Starting with 8/11/2020 production, 2020 model year Highlander vehicles will not include visor bracket covers.
• 10179742Aug 27, 2020Equipment, Body and structure. TT: Starting with 8/11/2020 production, 2020 model year Highlander vehicles will not include visor bracket covers.
• 10179765Aug 12, 2020Equipment, Electrical system. TSB: 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…
• 10179721Aug 12, 2020Electrical system. TSB: 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…
• 10179702Aug 7, 2020Engine. TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation condition (inconsistent acceleration) and would like to recover detailed customer voice and vehicle data.
• 10179606Aug 7, 2020Engine, Equipment. TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation condition (inconsistent acceleration) and would like to recover detailed customer voice and vehicle data.
• 10178528Jul 31, 2020Body and structure. OBSOLETE NOTICE July 31, 2020: This bulletin is no longer applicable and is now obsolete.
• 10178524Jul 30, 2020Engine cooling. TT: HVAC drain tube is found to be blocked/clogged.
• 10178787Jul 20, 2020Electrical system. 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…
• 10177779Jun 23, 2020Engine cooling. TT: Repairing a 1234YF HVAC system on a gas powered (non-hybrid) Toyota vehicle may require additional compressor oil to complete the repairs. The various 1234YF compressor oils (ND-12, PS-D1, or VC100YF) are available through the Toyota Approved Dealer Equipment website.
• 10177592Jun 12, 2020Engine. TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation condition (inconsistent acceleration) and would like to recover detailed customer voice and vehicle data.
• 10177575Jun 1, 2020Engine. TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation condition (inconsistent acceleration) and would like to recover detailed customer voice and vehicle data.
• 10176704May 28, 2020Equipment, Body and structure. TT: Unibody vehicles commonly have lashing holes on the under body used for securing the vehicle during logistics -The lashing holes are intended to be plugged during Pre-Delivery Service (PDS) -The plugs are: oRequired for anti-corrosion purposes oUsually located in the glove box prior to PDS -The number of plugs may be different based on model and production location
• 10176504May 18, 2020Electrical system, Equipment. TT: To assist with the early detection and early resolution of audio related concerns, it may be requested as part of the remanufactured head unit return to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by audio suppliers, FTS, and/or FPEs.
• 10176493May 13, 2020Equipment, Electrical system. TT: The microphone circuit passes through the DCM before reaching the radio/navigation system. To simplify the diagnosis of the microphone, Safety Connect SOS button lights, and DCM (Data Communication Module/telematics transceiver) inoperative conditions, refer to the procedure below to prevent unnecessary parts replacement.
• 10174921Apr 23, 2020Equipment. TT: Due to the challenges caused by the COVID-19 virus threat, some dealers are experiencing reduced traffic into their stores and causing dealer stock to age.
• 10174896Apr 9, 2020Visibility (wipers, defrost, mirrors), Lane departure. TT: The blind spot monitor (BSM) sensor angle inspection is used to confirm that the BSM sensor is within the specified angle before performing axis beam adjustment. When used in conjunction with the repair manual, these BSM tips leverage SSTs and readily available tools to support sensor angle confirmation in varying shop environments.
• 10174890Apr 6, 2020Equipment. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. PG021-88, PG015-89, PG0015-90, PG002-91, PG002-93, PG005-97, PG007-01, PG007-07, PG006-01, PG004-97, T-SB-0144-08, and T-SB-0304-17. The aforementioned bulletins are obsolete, and any printed versions should be discarded. Replacement certification labels (the vinyl label installed on the driver door or door post)…
• 10173990Mar 30, 2020Electrical system, Equipment. Some 2020 model year vehicles equipped with Audio Plus (version 1021) or Premium Audio (version 1021) or earlier may exhibit one or more of the following conditions: ?Barge in function defaulted to OFF ?Limited phone book grammar ?Difficult Hand Free operation ?Abnormal Electronic Owner?s Manual operation ?Music does not automatically resume when using Android Auto?
• 10173984Mar 26, 2020Body and structure. TT: In the interest of customer satisfaction, the adoption of wrap guard film to the Front and Rear Door, Window Frame Moldings (Black Out Moldings), was implemented on 2020 model year Highlander and Highlander HV. This film should be removed after transportation to dealerships, as part of the normal Pre-Delivery Service (PDS).
• 10173972Mar 19, 2020Equipment. Safety Recall and Service Campaign - Technician Certification Requirements
• 10173969Mar 19, 2020Electrical system. Some 2020 model year Tundra vehicles equipped with Audio Plus (version 1186) or earlier may exhibit one or more of the following conditions: ?WiFi intermittently inoperative ?DTC B15DB present ?Changing the Auto Relock Timer setting also changes the Remote 2-Press unlock setting Some 2020 model year Tundra, RAV4, RAV4 Hybrid, Highlander, or Highlander Hybrid vehicles equipped with Audio Plus (version 1210), or…
• 10190459Mar 16, 2020Electrical system, Back-over prevention (rear camera). TT: Vehicle control apps might not operate as expected at times due to preconditions (normal operating parameters) not being established, vehicle settings and/or network/cellular coverage concerns.
• 10173966Mar 12, 2020Equipment. Safety Recall and Service Campaign - Technician Certification Requirements
• 10173805Mar 10, 2020Electrical system, Brakes, Equipment. TSB: 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.
• 10173740Mar 3, 2020Electrical system, Equipment. TSB: 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.

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