2020 Toyota 4RUNNER Technical Service Bulletins

158 technical service bulletins (TSBs) are on record for the 2020 Toyota 4RUNNER. 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.

• 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 OBSOLETE NOTICE July 31, 2020: This bulletin is no longer applicable and is now obsolete.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…
• 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.
• 10177589Jun 9, 2020Tires, Steering, Suspension. TT: Some 2019-2020 model year 4Runner SR5 and TRD Off Road grade models with Dunlop Grandtrek AT20 P265/70R17 tires may experience vibration (flutter) in the steering wheel when driving at highway speeds 55 mph and above.
• 10176697May 28, 2020Body and structure. TSB: Some 2014 - 2020 model year 4Runner vehicles may exhibit a gap due to disengagement of the front bumper cover clips and the fender retainer near the headlamp assembly. Follow the Repair Procedure in this bulletin to address this condition.
• 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, 2020Electrical system, Equipment. 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.
• 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?
• 10173972Mar 19, 2020Equipment. Safety Recall and Service Campaign - Technician Certification Requirements
• 10173968Mar 18, 2020Air bags, Forward collision avoidance. TSB: All 2018 ? 2021 model year Sequoia, Tacoma, and Tundra vehicles and All 2020 ? 2021 model year 4Runner vehicles are equipped with Pre-collision System (PCS) and Dynamic Radar Cruise Control (DRCC) as part of the Toyota Safety Sense (TSS) package. The PCS and DRCC systems are designed to help mitigate a potential collision and maintain a pre-determined traveling distance.
• 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, Equipment, Brakes. 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.
• 10173792Mar 9, 2020Tires, Steering. TT: Some 2019-2020 model year 4Runner SR5 and TRD Off Road grade models with Dunlop Grandtrek AT20 P265/70R17 tires may experience vibration (flutter) in the steering wheel when driving at highway speeds 55 mph and above.
• 10173740Mar 3, 2020Equipment, Electrical system. 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.
• 10172863Feb 25, 2020Equipment, Electrical system. 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…
• 10172862Feb 25, 2020Equipment. TT: Some new vehicles may experience the SOS/Telematics functions inoperative during Pre-Delivery Inspection or after replacement. The following procedure outlines the process to activate the DCM with the cellular network.
• 10173776Feb 22, 2020Wheels, Tires, Body and structure. This Technical Service Bulletin provides procedures to inspect and repair certain model year 2020 Toyota 4Runner vehicles equipped with GST installed wheels that are part of its Blackout Package which may exhibit an abnormal noise when in Reverse with the wheels at or near full lock due to interference between the tire and bumper and/or fender liner. The non-Toyota wheel accessory was installed as a Gulf States…
• 10172858Feb 21, 2020Equipment, Electrical system. 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…
• 10172856Feb 19, 2020Body and 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…
• 10172854Feb 18, 2020Equipment. 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.
• 10172852Feb 18, 2020Equipment. Safety Recall and Service Campaign - Technician Certification Requirements
• 10172846Feb 14, 2020Equipment. TSB: To prevent paint damage during transportation, the roof rack leg covers are kept inside the vehicle so that the Rapgard? protective film can remain in place on the roof panel. Install roof rack leg covers on all vehicles according to the procedure outlined in this bulletin during Pre-Delivery Service (PDS).
• 10172836Feb 7, 2020Equipment. 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.
• 10172819Feb 4, 2020Equipment. TT: Some vehicles may experience a ?New software is not compatible with the system.? Pop-up while performing T-SB-0003-20 during the head unit software installation process
• 10172379Jan 31, 2020Brakes. TT: Some 2014-2020 model year 4Runner vehicles may experience the ABS Light ON with DTC C0226, C0236, C0246 and C0256 stored current in the ABS system.
• 10171410Jan 29, 2020Electrical 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.
• 10171405Jan 27, 2020Equipment. 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…
• 10171404Jan 24, 2020Equipment. 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…
• 10171457Jan 23, 2020Equipment. 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.
• 10171453Jan 22, 2020Equipment. 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…
• 10171442Jan 13, 2020Brakes, Equipment. TSB: REVISION NOTICE January 13, 2020 Rev1: ? Applicability has been updated to exclude 2020 model year Tacoma vehicles. ? The Introduction, Software Update Information, and Software Update Procedure sections have been updated. Any previous printed versions of this bulletin should be discarded. Some 2020 model year vehicles equipped with Audio Plus (version 1021) or Premium Audio (version 1021) or earlier may…
• 10171701Jan 8, 2020Equipment. 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.
• 10171697Jan 7, 2020Equipment. 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.
• 10171695Jan 7, 2020Electrical system, Equipment. TT: Some 2020 model year vehicles may display abnormal Safety Connect operation during PDS due to DCM activation issues. This condition is characterized by 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. To determine if a vehicle is experiencing this condition, connect a Techstream and navigate to: Telematics-Data…
• 10170184Dec 13, 2019Equipment. 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…
• 10170728Dec 5, 2019Equipment, Electrical system. TT: Some 2020 model year vehicles may display abnormal Safety Connect operation during PDS due to DCM activation issues. This condition is characterized by 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. To determine if a vehicle is experiencing this condition, connect a Techstream and navigate to: Telematics-Data…
• 10169440Nov 20, 2019Electrical 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 doesn?t automatically resume when using Android Auto ? Cover art isn?t displayed ?Vehicle…
• 10169334Nov 18, 2019Equipment, Electrical 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.
• 10169412Nov 7, 2019Equipment. TSB: Some 2017 ? 2020 model year 4Runner vehicles equipped with JBL® audio may exhibit poor sound quality coming from the dash speakers or static/feedback heard by the incoming caller. Updated speakers are available to address this condition. Follow the Repair Procedure in this bulletin to address this condition.
• 10168537Oct 21, 2019Steering. 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…
• 10166035Sep 24, 2019Equipment. TT: Some new vehicles may experience the SOS/Telematics functions inoperative during Pre-Delivery Inspection or after replacement. The following procedure outlines the process to activate the DCM with the cellular network. To begin the process below, move the vehicle to an area with cell reception.
• 10164905Aug 15, 2019Equipment. 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…
• 10164352Jul 16, 2019Equipment, Electrical 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…
• 10164337Jul 3, 2019Equipment. 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…
• 10164330Jul 1, 2019Transmission and drivetrain, 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…
• 10162757Jun 24, 2019Equipment, Body and structure. TSB: TMNA Accessory Sales and Marketing has developed a Toyota paint protection film (PPF) decal (treated with a specially developed light adhesive) for 2019 ? 2020 model year Toyota vehicles. The decal comes in two sizes (2.8 in. x 8 in. and 4 in. x 8 in.) for small and large hoods and will be applied to the top of PPF for all series at TLS accessory installation facilities. The decal is intended to stay affixed…

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