Ford Transit Service Bulletins (2021)
134 manufacturer communications on file.
- July 23, 2024•Document ID: 11006036Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- 24B47
- Date Added:
- August 7, 2024
- Manufacturer:
- FORD
SummaryCertain 2018 - 2024 Model Year Various Vehicles Update SYNC Software In all the affected vehicles, due to an error in the SYNC software, you may experience SYNC system instability concerns and/or a failure to preserve certain settings across ignition cycles. This may result in a black infotainment screen that does not affect rear view camera, incorrect language setting, erased or unsaved radio presets, and potential inability to perform software updates.
Associated Products (32)2024 Ford Bronco Sport2024 Ford Maverick2023 Ford Bronco Sport2023 Ford Explorer2023 Ford Maverick2023 Ford Mustang2023 Ford Ranger2023 Ford Transit2023 Lincoln Aviator2022 Ford Bronco Sport2022 Ford Ecosport2022 Ford Escape2022 Ford Explorer2022 Ford Maverick2022 Ford Mustang2022 Ford Ranger2022 Ford Transit2022 Ford Transit Connect2022 Lincoln Aviator2022 Lincoln Corsair+ 12 moreAssociated Documents - July 16, 2024•Document ID: 11005746Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- SSM 52722
- Date Added:
- August 6, 2024
- Manufacturer:
- FORD
SummarySome 2019-2024 Ford and Lincoln vehicles equipped with SYNC3 may experience various FordPass/LincolnWay connectivity concerns including but not limited to: missing activation prompt (pop-up) on the vehicle's center display screen when attempting to activate vehicle through FordPass/LincolnWay, incorrect location/global positioning system (GPS) reported through FordPass/LincolnWay, problems with remote commands being performed through FordPass/LincolnWay, incorrect data/information reported on FordPass/LincolnWay. These symptoms will be accompanied by diagnostic trouble code (DTC) B156D:89 in the TCU. This may be due the accessory protocol interface module (APIM) software
Associated Products (33)2024 Ford Explorer2024 Ford Maverick2024 Ford Transit2024 Lincoln Aviator2023 Ford Bronco Sport2023 Ford Explorer2023 Ford Maverick2023 Ford Mustang2023 Ford Ranger2023 Ford Transit2023 Lincoln Aviator2022 Ford Bronco Sport2022 Ford Ecosport2022 Ford Escape2022 Ford Explorer2022 Ford Maverick2022 Ford Mustang2022 Ford Ranger2022 Ford Transit2022 Lincoln Aviator+ 13 moreAssociated Documents - July 9, 2024•Document ID: 11005710Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- SSM 52704
- Date Added:
- August 5, 2024
- Manufacturer:
- FORD
SummarySome 2019-2024 vehicles equipped with SYNC 3 may experience a programming Error - "INSTL_ERR12" while programming APIM using the Ford Diagnosis and Repair System (FDRS) or experience a frozen screen which says "updating system software" or no progress/response from module using the universal USB updater. This may be due to low memory in the APIM commonly occurring on software level NU5T-14G381-AB/BB. The current software level can be verified in the SYNC tab of Professional Technician System (PTS) or using the vehicle's center display screen, Settings > General > About. To correct the condition, run the universal USB updater. If unsuccessful, using the latest software version of the FDRS scan tool, run the service function "APIM - Reset the Accessory Protocol Interface Module Application" and select "Clear All User Data" option. The center display screen will reboot. As soon as the vehicle's center display screen displays the boot up logo, immediately reinsert the same universal serial bus (USB) drive that was utilized during the prior failed programming attempt.
Associated Products (34)2024 Ford Bronco Sport2024 Ford Explorer2024 Ford Maverick2024 Ford Transit2024 Lincoln Aviator2023 Ford Bronco Sport2023 Ford Explorer2023 Ford Maverick2023 Ford Mustang2023 Ford Ranger2023 Ford Transit2023 Lincoln Aviator2022 Ford Bronco Sport2022 Ford Ecosport2022 Ford Escape2022 Ford Explorer2022 Ford Maverick2022 Ford Mustang2022 Ford Ranger2022 Ford Transit+ 14 moreAssociated Documents - June 28, 2024•Document ID: 11003146Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- SSM 52675
- Date Added:
- July 3, 2024
- Manufacturer:
- LINCOLN
SummarySome 2019-2024 vehicles equipped with SYNC 3 may experience a programming Error - "INSTL_ERR12" while programming APIM using the Ford Diagnosis and Repair System, or experience a frozen screen which says "updating system software" or no progress/response from module using the universal USB updater. This may be due to low memory in the APIM commonly occurring on software level
Associated Products (34)2024 Ford Bronco Sport2024 Ford Explorer2024 Ford Maverick2024 Ford Transit2024 Lincoln Aviator2023 Ford Bronco Sport2023 Ford Explorer2023 Ford Maverick2023 Ford Mustang2023 Ford Ranger2023 Ford Transit2023 Lincoln Aviator2022 Ford Bronco Sport2022 Ford Ecosport2022 Ford Escape2022 Ford Explorer2022 Ford Maverick2022 Ford Mustang2022 Ford Ranger2022 Ford Transit+ 14 moreAssociated Documents - June 6, 2024•Document ID: 11001646Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- TSB 24-2182
- Date Added:
- June 13, 2024
- Manufacturer:
- FORD
SummaryThis article supersedes TSB 23-2307 to update the Service Procedure and vehicle model years affected. Some 2019-2020 Edge/F-150/Fusion/Continental/MKZ/Nautilus, 2019-2021 Transit Connect, 2019-2023 Mustang, 2019-2023 Ranger, 2020-2021 Expedition/Navigator, 2020-2022 Escape/Corsair/Super Duty/EcoSport, 2020-2024 Explorer/Aviator/Transit, 2021-2024 Bronco Sport, 2022-2024 Maverick vehicles with SYNC 3 may experience various SYNC performance related concerns. This may be due to the SYNC Software. To correct the condition, follow the Service Procedure to update theaccesory protocol interface module (APIM) software.
Associated Products (34)2024 Ford Bronco Sport2024 Ford Explorer2024 Ford Maverick2024 Ford Transit2024 Lincoln Aviator2023 Ford Bronco Sport2023 Ford Explorer2023 Ford Maverick2023 Ford Mustang2023 Ford Ranger2023 Ford Transit2023 Lincoln Aviator2022 Ford Bronco Sport2022 Ford Ecosport2022 Ford Escape2022 Ford Explorer2022 Ford Maverick2022 Ford Mustang2022 Ford Ranger2022 Ford Transit+ 14 moreAssociated Documents - June 6, 2024•Document ID: 11001369Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- SSM 52596
- Date Added:
- June 10, 2024
- Manufacturer:
- FORD
Summary2024-2024 Tranist- Keyless Entry Keypad and Master Code Retrieval. All accessory stick-on keyless entry keypads come with a wallet card containing the master code. If the accessory keypad was factory installed, this card will be placed in a plastic bag that is located in instrument panel pocket behind the steering wheel. During vehicle delivery, the card should be handed to the vehicle's owner. Unlike the integrated (wired) factory keypad, the accessory keypad master code cannot be retrieved from the vehicle using a diagnostic scan tool. If the wallet card for an accessory keypad is lost, follow these steps to recover the code. Dealer Key Code access is granted through the Dealer Program Enrollment System (DPES); dealership management can authorize users.
Associated Products (4)Associated Documents - May 31, 2024•Document ID: 11001180Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- TSB 24-2176
- Date Added:
- June 7, 2024
- Manufacturer:
- FORD
SummaryThis article supersedes TSBs 24-2100 and 24-2070 to add 2023 F-150 vehicles, update the TSB Issue statement and the TSB Service Procedure. Some 2021-2023 F-150, 2022-2023 Expedition/Navigator/Mustang and 2020-2023 Transit/Explorer/Aviator vehicles equipped with a 10R80/10R80MHT transmission may exhibit a harsh/delayed engagement and/or harsh/delayed shift, an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701, P2702, P2703, P2704, P2705, P2707, P2708, P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6 and/or P07F7 stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to the software in the powertrain control module (PCM) or transmission control module (TCM), the transmission solenoid ID strategy, sticking valves in the main control valve body and/or axial movement of the CDF clutch cylinder (7H351) sleeve. To correct the condition, follow the Service Procedure to identify and correct the condition.
Associated Products (18)2023 Ford Expedition2023 Ford Explorer2023 Ford F-1502023 Ford Mustang2023 Ford Transit2023 Lincoln Aviator2023 Lincoln Navigator2022 Ford Expedition2022 Ford Explorer2022 Ford F-1502022 Ford Mustang2022 Ford Transit2022 Lincoln Aviator2022 Lincoln Navigator2021 Ford Explorer2021 Ford F-1502021 Ford Transit2021 Lincoln AviatorAssociated Documents - May 18, 2024•Document ID: 11000297Service Bulletin/Repair InstructionsPOWER TRAIN
- Mfr Comm. #:
- SSM 52548
- Date Added:
- May 23, 2024
- Manufacturer:
- FORD
SummaryVarious vehicles equiped with 10R80/10R80 MHT/10R100/10R140 transmissions may require replacement of the seal kits (7153) when internal repairs are being performed. These kits come with 4 wheel drive (4WD) seals and will no longer include the 2WD seals. When working on a 2WD vehicle, any 2WD seals must be ordered separately. Refer to the parts catalog for the proper 2WD seals required.
Associated Products (31)2025 Ford Explorer2024 Ford Expedition2024 Ford Explorer2024 Ford F-1502024 Ford Mustang2024 Ford Transit2024 Lincoln Navigator2023 Ford Expedition2023 Ford Explorer2023 Ford F-1502023 Ford Mustang2023 Ford Ranger2023 Ford Transit2023 Lincoln Aviator2023 Lincoln Navigator2022 Ford Expedition2022 Ford Explorer2022 Ford F-1502022 Ford Mustang2022 Ford Ranger+ 11 moreAssociated Documents - April 25, 2024•Document ID: 10254142Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- SSM 52483
- Date Added:
- May 3, 2024
- Manufacturer:
- FORD
SummarySome 2018-2019 Explorer and 2018-2024 Transit/F-150/Expedition/Navigator vehicles may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P0627, P025A, P025B, P00C6, P008A and/or U0109 stored in the powertrain control module (PCM). Diagnosis should include checking for an intermittent or partial disconnect of the harness to the fuel pump control module (FPCM) connector, connector pin push-outs, damaged pins/terminals, or loose/corroded grounds. Confirm FPCM connector (Explorer - C3239, Transit - C433, F-150 - C460/C4336, Expedition/Navigator - C433/C4033) is fully seated and inspect applicable grounds (Explorer G302, Transit - G401, F-150 - G401, Expedition/Navigator - G403/G406) prior to performing guided diagnostics or replacing any components.
Associated Products (16)Associated Documents - April 24, 2024•Document ID: 10254138Service Bulletin/Repair InstructionsEQUIPMENT
- Mfr Comm. #:
- SSM 52476
- Date Added:
- May 3, 2024
- Manufacturer:
- FORD
SummaryAll accessory stick-on keyless entry keypads come with a wallet card containing the master code. If the accessory keypad was factory installed, this card will be placed in the glove box and should be handed to the vehicles owner during initial delivery. Unlike the integrated (wired) factory keypad, the accessory keypad master code cannot be retrieved from the vehicle using a diagnostic scan tool. If the wallet card for an accessory keypad is lost, follow these steps to recover the code. Dealer Key Code access is granted through the Dealer Program Enrollment System (DPES); dealership management can authorize users. The authorized user must go to FMCDealer.com > Parts and Service > Parts Product Line Information > Keys/Entry Devices > Aftermarket Keyless Entry Keypad Code Access. Follow the instructions on the screen to obtain the master code for the accessory keypad.
Associated Products (41)2024 Ford Edge2024 Ford Explorer2024 Ford F-1502024 Ford Mustang2024 Ford Ranger2023 Ford Bronco2023 Ford Bronco Sport2023 Ford Edge2023 Ford Escape2023 Ford Explorer2023 Ford F-1502023 Ford Maverick2023 Ford Mustang2023 Ford Ranger2022 Ford Bronco2022 Ford Bronco Sport2022 Ford E-3502022 Ford E-4502022 Ford Ecosport2022 Ford Edge+ 21 moreAssociated Documents - April 16, 2024•Document ID: 10254123Service Bulletin/Repair InstructionsEXTERIOR LIGHTING
- Mfr Comm. #:
- SSM 52448
- Date Added:
- May 3, 2024
- Manufacturer:
- FORD
Summary2015-2024 Transit and 2023-2024 Transit Trail vehicles equipped with DRW have a high mount rear marker lamp that does not illuminate with the stop lamps. This lamp assembly may appear to be a stop lamp but is intended to illuminate with the parking lamps only. This information is available in Workshop Manual Section 417-01. The JDDAB feature code description, found under OASIS additional information, is common between single rear wheel and DRW vehicles, and incorrectly reflects stop functionality when applied to DRW units.
Associated Products (4)Associated Documents - April 2, 2024•Document ID: 10253886Service Bulletin/Repair InstructionsPOWER TRAIN
- Mfr Comm. #:
- TSB 24-2099
- Date Added:
- May 2, 2024
- Manufacturer:
- FORD
SummaryThis article supersedes TSB 22-2444 to add 2024 model year vehicles. Some 2015-2024 Transit vehicles equipped with rear wheel drive (RWD), single rear wheel (only), and U-joints at the transmission flange and rear driveshaft may experience a boom/hum/moan noise from the rear while driving. This noise is most noticeable at highway speeds: 112-121 km/h (70-75 mph) for 4.10 axle ratio 121-128 km/h (75-80 mph) for 3.73 axle ratio 136-145 km/h (85-90 mph) for 3.31 axle ratio The noise may also be present to a lesser degree at roughly half of the noted speeds. This may be due to a 2nd order driveline frequency transmitted through the rear driveshaft, rear axle and into the body through the leaf springs.
Associated Products (4)Associated Documents - March 29, 2024•Document ID: 10252673Service Bulletin/Repair InstructionsPOWER TRAIN
- Mfr Comm. #:
- TSB 24-2100
- Date Added:
- April 4, 2024
- Manufacturer:
- FORD
SummaryThis article supersedes TSB 24-2059 to update the Service Procedure LTIS statement. Some 2021-2022 F-150, 2022-2023 Expedition/Navigator/Mustang and 2020-2023 Transit/Explorer/Aviator vehicles equipped with a 10R80/10R80MHT transmission may exhibit a harsh/delayed engagement and/or harsh/delayed shift, an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) that are stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to the software in the powertrain control module (PCM) or transmission control module (TCM), the transmission solenoid ID strategy, sticking valves in the main control valve body and/or axial movement of the CDF clutch cylinder (7H351) sleeve.
Associated Products (17)2023 Ford Expedition2023 Ford Explorer2023 Ford Mustang2023 Ford Transit2023 Lincoln Aviator2023 Lincoln Navigator2022 Ford Expedition2022 Ford Explorer2022 Ford F-1502022 Ford Mustang2022 Ford Transit2022 Lincoln Aviator2022 Lincoln Navigator2021 Ford Explorer2021 Ford F-1502021 Ford Transit2021 Lincoln AviatorAssociated Documents - March 15, 2024•Document ID: 10252528Service Bulletin/Repair InstructionsSEATS
- Mfr Comm. #:
- TSB 24-2053
- Date Added:
- April 3, 2024
- Manufacturer:
- FORD
SummaryThis article supersedes TSB 23-2235 to correct the Parts List and update Step 2 of the Service Procedure. Some 2019-2021 Transit vehicles built on or before 11-Feb-2021 may experience a front seat cushion sagging. The vehicle may also exhibit an illuminated air bag warning indicator with diagnostic trouble codes (DTCs) B1408, B1405, B1407, B0001, B0010 and/or B1404 stored in the restraints control module (RCM). To correct this condition, follow the Service Procedure to replace the suspension mat assembly and install additional webbing strap assemblies to the seat frame.
Associated Products (1)Associated Documents - March 13, 2024•Document ID: 10252662Service Bulletin/Repair InstructionsPOWER TRAIN
- Mfr Comm. #:
- TSB 24-2059
- Date Added:
- April 4, 2024
- Manufacturer:
- FORD
SummaryThis article supersedes TSB 23-2351 to remove 2023 F-150 10R80 and 10R80 MHT vehicle applications. The 2023 F-150 10R80 and 10R80 MHT vehicles will be the subject of a separate article. Some 2021-2022 F-150, 2022-2023 Expedition/Navigator/Mustang and 2020-2023 Transit/Explorer/Aviator vehicles equipped with a 10R80/10R80MHT transmission may exhibit a harsh/delayed engagement and/or harsh/delayed shift, an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes that are stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to the software in the powertrain control module (PCM) or transmission control module (TCM), the transmission solenoid ID strategy, sticking valves in the main control valve body and/or axial movement of the CDF clutch cylinder (7H351) sleeve.
Associated Products (17)2023 Ford Expedition2023 Ford Explorer2023 Ford Mustang2023 Ford Transit2023 Lincoln Aviator2023 Lincoln Navigator2022 Ford Expedition2022 Ford Explorer2022 Ford F-1502022 Ford Mustang2022 Ford Transit2022 Lincoln Aviator2022 Lincoln Navigator2021 Ford Explorer2021 Ford F-1502021 Ford Transit2021 Lincoln AviatorAssociated Documents - March 6, 2024•Document ID: 10251952Service Bulletin/Repair InstructionsENGINE AND ENGINE COOLING
- Mfr Comm. #:
- SSM 52335
- Date Added:
- March 20, 2024
- Manufacturer:
- LINCOLN
SummaryFor 2015-2024 Ford and Lincoln vehicles equipped with turbocharged engines and customer concern of an engine oil leak, refer to Workshop Manual (WSM), Section 303-00 for oil leak inspection and testing methods. Ford has evaluated turbochargers replaced for oil leak symptoms and although oil may collect on the external surface of a turbocharger, it is extremely rare for a turbocharger assembly to be the root cause of the oil leak. Careful inspection of the turbocharger oil feed and drain tubes should be performed along with the recommended WSM procedures as needed. Warranty claims for turbocharger replacement going forward will be assessed.
Associated Products (60)2024 Ford Bronco2024 Ford Bronco Sport2024 Ford Edge2024 Ford Escape2024 Ford Expedition2024 Ford Explorer2024 Ford F-1502024 Ford Maverick2024 Ford Mustang2024 Ford Ranger2024 Ford Transit2024 Lincoln Aviator2024 Lincoln Corsair2024 Lincoln Nautilus2023 Ford Bronco2023 Ford Bronco Sport2023 Ford Edge2023 Ford Escape2023 Ford Expedition2023 Ford Explorer+ 40 moreAssociated Documents - March 1, 2024•Document ID: 10251934Service Bulletin/Repair InstructionsPOWER TRAIN
- Mfr Comm. #:
- SSM 52314
- Date Added:
- March 20, 2024
- Manufacturer:
- FORD
SummaryDuring service and repair requiring removal and replacement of a crankshaft bolt and/or crankshaft damper, achieving proper torque of the crankshaft pulley bolt is critical. Incorrect torque may allow the bolt to loosen resulting in the timing gear breaking and engine damage. Replacement of the bolt is critical to the repair and accurately following the installation procedure in the Workshop Manual (WSM) Section, 303-01 is extremely important. The bolt torque procedure can be found in the crankshaft front seal removal and installation procedure or in the engine assembly procedure.
Associated Products (67)2024 Ford Bronco2024 Ford Bronco Sport2024 Ford E-3502024 Ford E-4502024 Ford Edge2024 Ford Escape2024 Ford Expedition2024 Ford Explorer2024 Ford F-1502024 Ford Maverick2024 Ford Mustang2024 Ford Transit2024 Lincoln Aviator2024 Lincoln Corsair2024 Lincoln Nautilus2024 Lincoln Navigator2023 Ford Bronco2023 Ford Bronco Sport2023 Ford E-3502023 Ford E-450+ 47 moreAssociated Documents - February 29, 2024•Document ID: 10250852Service Bulletin/Repair InstructionsELECTRICAL SYSTEM
- Mfr Comm. #:
- SSM 52307
- Date Added:
- March 5, 2024
- Manufacturer:
- FORD
SummarySome 2020-2023 Ford and Lincoln SYNC3 equipped vehicles may experience an inaccurate notification in the FordPassî/LincolnWayî app indicating Vehicle Has Entered Deep Sleep Mode. Vehicle Has Entered Deep Sleep Mode message is expected if the vehicle has not been started for 14 consecutive days, battery voltage is at/below 9.5 volts or the body control module (BCM) 12 volt battery state of charge (SoC) drops below 50%. If the vehicle is going into deep sleep due to one of these conditions, follow normal Workshop Manual (WSM) Section 414-01 procedure to correct the concern. If the vehicle is going into deep sleep outside these conditions, this may be due to the telematics control unit (TCU) software. To correct this condition, follow the Service Procedure to update the TCU to the latest software. For claiming, use causal part 14G229 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.
Associated Products (30)2023 Ford Bronco Sport2023 Ford Explorer2023 Ford Maverick2023 Ford Mustang2023 Ford Ranger2023 Ford Transit Connect2023 Lincoln Aviator2022 Ford Bronco Sport2022 Ford Ecosport2022 Ford Escape2022 Ford Explorer2022 Ford Maverick2022 Ford Mustang2022 Ford Ranger2022 Ford Transit2022 Ford Transit Connect2022 Lincoln Aviator2022 Lincoln Corsair2021 Ford Bronco Sport2021 Ford Ecosport+ 10 moreAssociated Documents - January 16, 2024•Document ID: 10249488Service Bulletin/Repair InstructionsELECTRICAL SYSTEM
- Mfr Comm. #:
- 23H06
- Date Added:
- February 1, 2024
- Manufacturer:
- FORD
SummaryCertain 2021-2023 Model Year Mustang Mach-E and 2022-2023 Transit Battery Electric Vehicle (BEV) High Voltage Battery Module Replacement
Associated Products (3)Associated Documents - November 15, 2023•Document ID: 10246123Service Bulletin/Repair InstructionsPOWER TRAIN
- Mfr Comm. #:
- TSB 23-2351
- Date Added:
- December 5, 2023
- Manufacturer:
- FORD
SummarySome 2021-2023 F-150, 2022-2023 Expedition/Navigator, 2022-2023 Mustang, 2020-2023 Transit, 2020-2023 Explorer/Aviator vehicles equipped with a 10R80/10R80MHT transmission may exhibit a harsh/delayed engagement and/or harsh/delayed shift, an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes. stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to the software in the powertrain control module (PCM) or transmission control module (TCM), the transmission solenoid ID strategy, sticking valves in the main control valve body and/or axial movement of the CDF clutch cylinder (7H351) sleeve.
Associated Products (18)2023 Ford Expedition2023 Ford Explorer2023 Ford F-1502023 Ford Mustang2023 Ford Transit2023 Lincoln Aviator2023 Lincoln Navigator2022 Ford Expedition2022 Ford Explorer2022 Ford F-1502022 Ford Mustang2022 Ford Transit2022 Lincoln Aviator2022 Lincoln Navigator2021 Ford Explorer2021 Ford F-1502021 Ford Transit2021 Lincoln AviatorAssociated Documents