2012 Toyota Sienna Technical Service Bulletins

372 technical service bulletins (TSBs) are on record for the 2012 Toyota Sienna. 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.

• 10109492Sep 30, 2014Transmission and drivetrain. TSB: The purpose of this bulletin is to provide precautions to follow when installing an automatic transmission/transaxle assembly to avoid MIL "ON" shifting issues and/or transmission damage. Use the information in this bulletin when installing an automatic transmission/transaxle assembly.
• 10109587Aug 19, 2014Equipment. Tech Tip: Since MY 2011, several different update or upgrade USB SSTs have been issued for Toyota audio and navigation systems.
• 10132742Jul 29, 2014Electrical system, Visibility (wipers, defrost, mirrors). Tech Tip: Tips for writing a DPR (Dealer Product Report) on manufacturing issues for windows and windshields.
• 10132715Jul 25, 2014Equipment. TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased.
• 10132741Jul 8, 2014Engine. Tech Tip: Starting with the 2010 Model Year, Toyota began a gradual transition to the use of synthetic 0w20 viscosity engine oil. There are multiple benefits of this oil including: Reduced friction and wear on engine surfaces, Improved fuel economy, Reduction in waste oil stream (in vehicles approved for 10,000 mile oil change intervals), Reduced maintenance cost (in vehicles approved for 10,000 mile oil change…
• 10132710Jul 8, 2014Brakes. TSB: Some 2011 ? 2014 model year Sienna vehicles may exhibit a vibration/pulsation from the front brakes that can be felt in the brake pedal while lightly applying the brake pedal. New front brake pads and a new field fix repair procedure have been developed to improve this condition.
• 10060734Jul 8, 2014Brakes. Summary to be provided on a future date.
• 10132708Jul 7, 2014Equipment. TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased.
• 10132762Jun 12, 2014Electrical 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).
• 10132794Jun 4, 2014Forward collision avoidance. Dealer Letter: The Pre-Collision System (PCS) uses a radar sensor to determine the possibility of a frontal collision. FCC regulations require the radar sensor to be temporarily inactive while the vehicle is stopped. Due to a program error in the Driving Support ECU, if the radar sensor is inactive for 10 seconds or more, the PCS may not reactivate on certain 2011-2014 Model Year Sienna vehicles equipped with PCS.
• 10132786Jun 4, 2014Forward collision avoidance. Region Letter: The Pre-Collision System (PCS) uses a radar sensor to determine the possibility of a frontal collision. FCC regulations require the radar sensor to be temporarily inactive while the vehicle is stopped. Due to a program error in the Driving Support ECU, if the radar sensor is inactive for 10 seconds or more, the PCS may not reactivate Pre-Collision Braking on certain 2011-2014 Model Year Sienna…
• 10056062Jun 4, 2014Equipment. Toyota: see document search button for owner letter. A program error, in driving support ecu, has radar sensor pre-collision system (pcs) inactive 10 seconds or more, while stopped, will fail to reactivate pre-collision braking. Model 2011-2014 sienna.
• 10132814May 14, 2014Air bags, Electrical system. 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.
• 10132812May 1, 2014Engine, Back-over prevention (rear camera). Tech Tip: Low battery voltage can contribute to a MIL "ON" condition for P0335 (Crankshaft Position Sensor Circuit) and/or P0340 (Camshaft Position Sensor Circuit) due to inconsistent rotational speed of the engine's crankshaft.
• 10131826Apr 28, 2014Engine cooling. Some vehicles in particular geographic areas may exhibit a condition where the HVAC Evaporator Drain Hose has become obstructed with an insect nest. An insect repellent drain hose tip (ARINIX® Tip) is now available to help minimize future occurrences of this environmental condition. For some models, a new drain hose is required to properly fit the ARINIX® Tip. Follow the procedures in this bulletin for proper…
• 10131825Apr 23, 2014Transmission and drivetrain. This bulletin includes basic procedures for inspecting and adjusting World Standard (WS) Automatic Transmission Fluid (ATF) level at normal vehicle operating temperature.
• 10133741Mar 26, 2014Engine cooling. Prior to installing remanufactured U660 and U760 transaxles, it is necessary to remove the lower oil cooler tube union from the original transaxle case and install it into the reman unit. A NEW O-ring and printed installation instructions are supplied in separate bag with the reman unit. An instruction tag is also affixed to the unit.
• 10133740Mar 26, 2014Electrical system. The vehicle will not start or ready0on and the steering wheel lock is engaged so that the steering wheel may only be turned very little from side-to-side. If the operator attempts to ready-on or start the vehicle while there is tension on the steering lock actuator, it will not be able to fully disengage when the "ENGINE START STOP" or "POWER" switch is depressed.
• 10133728Mar 12, 2014Seats. Some 2011 ? 2014 model year Sienna vehicles with the factory mobility seat option may exhibit a condition where the seat slide function becomes inoperative due to plastic spacer interference in the lift mechanism. The seat lift mechanism has been improved to address this condition.
• 10131933Feb 28, 2014Equipment. Customer complains of Bluetooth connectivity concerns such as: Difficulty to pair phone, Intermittent Bluetooth failure to connect to the vehicle when first turning on the vehicle. 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…
• 10131930Feb 11, 2014Equipment. Since MY 2011, several different update or upgrade USB SSTs have been issued for Toyota audio and navigation systems. Refer to the chart below for a comprehensive list of all current and previously issued USB SSTs and their applicability.
• 10131927Feb 4, 2014Engine. Starting with the 2010 Model Year, Toyota began a gradual transition to the use of synthetic 0w-20 viscosity engine oil. There are multiple benefits of this oil. Due to the improved performance and durability of 0w-20 synthetic oil, Toyota has extended the oil change intervals to 10,000 miles for most vehicle that require this oil.
• 10131951Jan 23, 2014Tires. Toyota vehicles are equipped with either conventional or run-flat tires. Sometimes punctures may occur as a result of contact with road debris or other hazards. If a puncture occurs, it may be possible to repair the tire and return it to service. With a conventional tire it is not possible to drive for an extended amount of time with the tire at low pressures as damage to the tire may occur.
• 10131961Jan 14, 2014Air bags. Toyota vehicles are equipped with Supplemental Restraint Systems (SRS), including various airbags and in some models, seat belt pre-tensioners, to help reduce the risk of injury in a collision. If a customer expresses any concerns that the SRS airbags or pre-tensioner devices did not perform as expected (including an unintended deployment event), please follow the steps in the recommendations section below.
• 10131887Jan 10, 2014Seats. Some Sienna vehicles may exhibit a condition where the passenger or driver side 2nd row seat with the tip-up style lower seat cushion has excessive up and down movement. While some seat movement is a normal characteristic of the design, this bulletin will help identify excessive movement and provide steps to address this condition.
• 10132010Dec 23, 2013Equipment. The customer is unable to delete their call history or contacts from the Denso GEN7 Navigation System. The ?delete? soft button on the multi-information display is greyed out and not selectable.
• 10131993Dec 19, 2013Visibility (wipers, defrost, mirrors). This bulletin is now obsolete. Please see T-SB-0185-13.
• 10131988Dec 19, 2013Visibility (wipers, defrost, mirrors). The following procedures are recommended during routine maintenance or in the event of a customer concern for wiper performance.
• 10132055Nov 4, 2013Seats, Air bags, Equipment. Beginning in 1998, Toyota introduced side airbags as optional equipment. Toyota does NOT recommend replacement of original seat covers with non-Toyota leather or other seat cover materials on vehicles due to the following: Seat covers NOT recommended by Toyota may affect side airbag performance, in general or in part, during an accident. Modifications that negatively affect side airbag performance can result in…
• 10132135Oct 24, 2013Equipment, 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.
• 10132100Oct 24, 2013Engine. Immediately following a cold soak startup, some 2009 ? 2013 model year vehicles equipped with 1AR-FE or 2AR-FE engines may exhibit a brief knock/rattle noise from the engine compartment for approximately one second. Follow the repair procedure below to address this condition.
• 10062070Oct 24, 2013Equipment. Summary to be provided on a future date.
• 10132136Oct 23, 2013Visibility (wipers, defrost, mirrors). The appearance of spots in tempered glass (when viewed at certain angles) is the result of the heat treating and quick quenching process during manufacturing.
• 10132137Oct 2, 2013Equipment, Engine cooling. If a customer states there is an unpleasant odor in the vehicle from the HVAC system, there are various factors that may be involved.
• 10132131Oct 2, 2013Engine. Due to the improved performance and durability of 0w-20 synthetic oil, Toyota has extended the oil change intervals to 10,000 miles for most vehicles that require this oil. With this change, the following should be noted
• 10132130Oct 2, 2013Equipment. Customer?s experiencing this condition can use a 3rd party podcast application on their iPhone (such as Pocket Casts or Instances) instead of the native Apple Podcast application.
• 10132087Oct 2, 2013Engine cooling. Some vehicles may exhibit a condition where there is a lack of cooling from the A/C system. An A/C Line Retainer (Piping Clamp) may have become unlatched and caused a refrigerant leak. Follow the procedure in this bulletin to address this condition.
• 10062066Oct 2, 2013Equipment. Summary to be provided on a future date.
• 10062065Oct 2, 2013Equipment. Summary to be provided on a future date.
• 10061628Oct 2, 2013Equipment. Summary to be provided on a future date.
• 10132084Oct 1, 2013Transmission and drivetrain. The purpose of this service bulletin is to provide precautions to follow when installing an automatic transmission/transaxle assembly to avoid MIL ?ON,? shifting issues, and/or transmission damage. Use the information in this bulletin when installing an automatic transmission/transaxle assembly
• 10132163Sep 27, 2013Equipment. iTunes Radio is a new feature for iPhone 4, 4S, 5, 5S, and 5C running iOS 7 or later. This feature does work with the in-vehicle audio system either via Bluetooth or by USB cable. Details on how to access this feature are described below.
• 10062063Sep 27, 2013Equipment. Summary to be provided on a future date.
• 10132161Sep 26, 2013Equipment. Customers using iPhone 4, 4S, 5, 5S, or 5C running iOS 7.0 or later now have the ability to make Facetime Audio calls (no video). When a customer is paired by Bluetooth Hands Free and they make a Facetime Audio call the vehicle radio will treat it as a typical Bluetooth phone call. Because Facetime works differently than a typical phone call, the in-vehicle experience may not meet the customer?s expectations.
• 10062062Sep 26, 2013Equipment. Summary to be provided on a future date.
• 10075949Sep 25, 2013Equipment. Some users may experience no sound from the Pandora or iHeartRadio Entune Applications after attaching the iPhone USB cable to the multimedia system. This can also occur if the user chooses the iPod selection on the multimedia system and then attempts to return to Pandora or iHeartRadio Entune Applications. This condition occurs with iPhones running iOS 6.0 and later
• 10062019Sep 25, 2013Equipment. Summary to be provided on a future date.
• 10132160Sep 24, 2013Equipment. Some users may experience no sound from the Pandora or iHeartRadio Entune Applications after attaching the iPhone USB cable to the multimedia system. This can also occur if the user chooses the iPod selection on the multimedia system and then attempts to return to Pandora or iHeartRadio Entune Applications. This condition occurs with iPhones running iOS 6.0 and later.
• 10132157Sep 13, 2013Equipment. To receive satellite radio functions after the initial trial period has expired, the customer must enter into a contract with XM Satellite Radio Inc. After entering into a contract, registration of an 8-digit XM Radio ID is required. This 8-digit XM Radio ID is found by turning to channel ?0? of the satellite radio.
• 10132156Sep 13, 2013Equipment. If a customer states there is an unpleasant odor in the vehicle from the HVAC system, there are various factors that may be involved.

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