[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-653139-105":59,"doc-detail-653139-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","2011-toyota-prius-p261c-engine-coolant-pump-b-control-malfunction-diagnostic","2011 Toyota Prius - P261C Engine Coolant Pump \"B\" Control Malfunction Diagnostic","","2011 Toyota Prius (L4-1.8L 2ZR-FXE) hybrid service information explains the ECM control logic for the engine water pump. It covers how duty-cycle commands manage coolant flow, the malfunction monitoring conditions, and DTC interpretation for P261C with related range checks for low/high voltage. Procedures include connecting Techstream, clearing DTCs, warming and idling the engine, entering powertrain/engine menus, reading readiness and codes, and using active tests and wiring inspection guidance such as fuse checks and freeze-frame data.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/2011-toyota-prius-p261c-engine-coolant-pump-b-control-malfunction-diagnostic/653139/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/2011-toyota-prius-p261c-engine-coolant-pump-b-control-malfunction-diagnostic/653139.png","ImageObject",300,407,{"name":92,"@type":93},"vwvw","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-24",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does DTC P261C relate to on the 2011 Prius (2ZR-FXE)?","Question",{"text":112,"@type":113},"P261C concerns the engine coolant pump “B” control malfunction, specifically the engine water pump circuit range check for low voltage.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the ECM determine whether the cooling pump is operating correctly?",{"text":117,"@type":113},"The ECM uses a duty-cycle control and calculates pump speed feedback; it detects a malfunction when the measured pump speed or duty-cycle correspondence falls outside expected behavior.",{"name":119,"@type":110,"acceptedAnswer":120},"What is the recommended confirmation driving pattern for checking P261C-related codes?",{"text":121,"@type":113},"Connect Techstream to DLC3, clear DTCs, turn ignition cycles, warm the engine to at least 75°C, idle for 20 seconds or more, then navigate powertrain/engine and ECT menus to read DTCs and readiness judgment results.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},653139,1793030835,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":34,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},3985747874149,"https://ap-avatar.wpscdn.com/avatar/3a001161165b4dc3d9e?x-image-process=image/resize,m_fixed,w_180,h_180&k=1790129441039064114","P261C—2011 Toyota Prius L4-1.8L (2ZR-FXE) Hybrid Service Manua... [https://charm.li/Toyota/2011/Prius%20L4-1.8L%20%282ZR-FXE%2..](https://charm.li/Toyota/2011/Prius%20L4-1.8L%20%282ZR-FXE%2..) .  \nOperation CHARM: Car repair manuals for everyone .  \nHome >> Toyota >> 2011 >> Prius L4-1.8L (2ZR-FXE) Hybrid >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P261C  \nP261C  \n2ZR-FXE ENGINE CONTROL: SFI SYSTEM: P261B-P261D: Engine Coolant Pump \"B\" Control Malfunction  \nP261D-Engine Coolant Pump \"B\" Control Circuit High  \nDESCRIPTION  \nThe ECM controls the engine water pump assembly by calculating the necessary amount of coolant flow based  \non engine coolant temperature, engine speed and vehicle speed information. The speed of the engine water  \npump assembly is controlled steplessly using duty cycle signal sent from the ECM. This optimal control  \nenhances warm-up performance and reduces cooling losses, thus reducing the specific fuel consumption of the  \nengine.  \nMONITOR DESCRIPTION  \nThe ECM calculates the speed of the engine water pump assembly using a duty cycle signal sent from the engine water pump assembly. When the speed of the engine water pump assembly becomes less than 900 rpm while it is operating, the ECM detects the malfunction and stores DTC P261B.  \nThe engine water pump assembly operates steplessly based on a duty cycle signal sent from the ECM. If actual drive duty cycle ratio does not correspond to the target drive duty cycle of the engine water pump assembly, the ECM detects the malfunction.  \nMONITOR STRATEGY  \nTYPICAL ENABLING CONDITIONS  \nAll  \nP261B: Engine Water Pump Circuit Performance  \npro multis · About Operation CHARM  \n1 of 7 3/15/2026, 10:32 AM  \nP261C—2011 Toyota Prius L4-1.8L (2ZR-FXE) Hybrid Service Manua... [https://charm.li/Toyota/2011/Prius%20L4-1.8L%20%282ZR-FXE%2..](https://charm.li/Toyota/2011/Prius%20L4-1.8L%20%282ZR-FXE%2..) .  \nP261C, P261D: Engine Water Pump Circuit Range Check (Low Voltage, High Voltage)  \nTYPICAL MALFUNCTION THRESHOLDS  \nP261B: Engine Water Pump Circuit Performance  \nP261C: Engine Water Pump Circuit Range Check (Low Voltage)  \nP261D: Engine Coolant Pump Circuit Range Check (High Voltage)  \nCOMPONENT OPERATING RANGE  \nCONFIRMATION DRIVING PATTERN  \n1. Connect the Techstream to the DLC3 .  \n2. Turn the power switch on (IG) and turn the Techstream on.  \n3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) .  \n4. Turn the power switch off and wait for 30 seconds.  \n5. Turn the power switch on (IG) and turn the Techstream on [A] .  \n6. Put the engine in inspection mode Component Tests and General Diagnostics.  \n7. Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher) [B] .  \n2 of 7 3/15/2026, 10:32 AM  \nP261C—2011 Toyota Prius L4-1.8L (2ZR-FXE) Hybrid Service Manua... [https://charm.li/Toyota/2011/Prius%20L4-1.8L%20%282ZR-FXE%2..](https://charm.li/Toyota/2011/Prius%20L4-1.8L%20%282ZR-FXE%2..) .  \n8. Idle the engine for 20 seconds or more [C] .  \n9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.  \n10. Read the DTC [D] .  \nHINT  \n* If the DTC is output, the system is malfunctioning.  \n* If a DTC is not output, perform the following procedure.  \n11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.  \n12. Input the DTC: P261B, P261C or P261D.  \n13. Check the DTC judgment result.  \nHINT  \n* If the judgment result shows NORMAL, the system is normal.  \n* If the judgment result shows ABNORMAL, the system has a malfunction.  \n* If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [C] again.  \n14. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.  \n15. Check the judgment result.  \nHINT  \n* If the judgment result shows NORMAL, the system is normal.  \n* If the judgment result shows ABNORMAL, the system has a malfunction.  \n16. If the test result is INCOMP","cbCaiaKtPamFB19C","https://ap.wps.com/l/cbCaiaKtPamFB19C","pdf",1727885,"English","# DTC Information\n## Description and Monitor Description\n## Monitor Strategy and Enabling Conditions\n## Typical Malfunction Thresholds\n## Confirmation Driving Pattern\n## Inspection Procedure and Active Test\n## Wiring Diagram and Wiring Inspection Notes","[{\"question\":\"What does DTC P261C relate to on the 2011 Prius (2ZR-FXE)?\",\"answer\":\"P261C concerns the engine coolant pump “B” control malfunction, specifically the engine water pump circuit range check for low voltage.\"},{\"question\":\"How does the ECM determine whether the cooling pump is operating correctly?\",\"answer\":\"The ECM uses a duty-cycle control and calculates pump speed feedback; it detects a malfunction when the measured pump speed or duty-cycle correspondence falls outside expected behavior.\"},{\"question\":\"What is the recommended confirmation driving pattern for checking P261C-related codes?\",\"answer\":\"Connect Techstream to DLC3, clear DTCs, turn ignition cycles, warm the engine to at least 75°C, idle for 20 seconds or more, then navigate powertrain/engine and ECT menus to read DTCs and readiness judgment results.\"}]","2011 Toyota Prius - P261C Engine Coolant Pump \"B\" Control Malfunction Diagnostic | PDF",1792885824,18]