{"product_id":"12-pin-bcm-central-control-module-connector-male-female-oem-can-bus","title":"12-Pin BCM Central Control Module Connector – Male \u0026 Female OEM | CAN Bus","description":"\u003ch2\u003e12-Pin BCM Central Control Module Connector – Male \u0026amp; Female OEM\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003e12-pin connector\u003c\/strong\u003e serves vehicle Body Control Module (BCM) and Central Control Module (CCM) harnesses, integrating power, ground, CAN bus, and multi-function control signal circuits in a single housing. Available in Male, Female, and a pre-wired 20CM Male-and-Female pair for harness extension or repair. The 12-pin configuration is widely used in BCM, door module, and multi-function control unit harnesses across multiple vehicle platforms.\u003c\/p\u003e\n\n\u003ch3\u003eWhy BCM Connectors Carry Both High-Current and CAN Bus Circuits\u003c\/h3\u003e\n\u003cp\u003eThe BCM is the central hub of a vehicle's body electrical system, controlling window motors, door locks, lighting relays, and interior electronics — while simultaneously communicating with the engine ECU, ABS module, and instrument cluster via CAN bus. The 12-pin BCM connector must carry both high-current body circuits (up to 20A for window motors and door locks) and low-current CAN bus signals (typically 5V differential) in the same housing. This mixed-signal design makes the BCM connector particularly sensitive to corrosion: a corroded CAN bus pin causes U-code communication faults across multiple systems simultaneously, while a corroded power pin causes individual body function failures.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003e12-Pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGender Options\u003c\/td\u003e\n\u003ctd\u003eMale \/ Female \/ Male and Female pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eNylon (PA66)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Option\u003c\/td\u003e\n\u003ctd\u003eBare connector \/ 15cm pre-wired \/ 20cm Male-and-Female pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eBCM, CCM, door module, multi-function control unit harness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCAN Bus Compatibility\u003c\/td\u003e\n\u003ctd\u003eCAN High \/ CAN Low differential signal circuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFault Codes This Connector Fixes\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCode\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003cth\u003eRoot Cause\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eU0073\u003c\/td\u003e\n\u003ctd\u003eCAN bus off — communication bus fault\u003c\/td\u003e\n\u003ctd\u003eCorroded CAN H or CAN L pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eU0100\u003c\/td\u003e\n\u003ctd\u003eLost communication with ECM\/PCM\u003c\/td\u003e\n\u003ctd\u003eCAN bus interruption at BCM connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eU0121\u003c\/td\u003e\n\u003ctd\u003eLost communication with ABS control module\u003c\/td\u003e\n\u003ctd\u003eCAN bus interruption at BCM connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eU0155\u003c\/td\u003e\n\u003ctd\u003eLost communication with instrument panel cluster\u003c\/td\u003e\n\u003ctd\u003eCAN bus interruption at BCM connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB-codes (multiple)\u003c\/td\u003e\n\u003ctd\u003eWindow, door lock, lighting, interior function faults\u003c\/td\u003e\n\u003ctd\u003eCorroded power or ground pins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eDiagnostic signature:\u003c\/strong\u003e Multiple simultaneous U-codes from different modules, combined with body function failures, is the classic pattern of a failed BCM connector — not individual module failures.\u003c\/p\u003e\n\n\u003ch3\u003eBCM Connector Failure – How to Diagnose\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eConnect a scan tool and read all module fault codes (not just one module)\u003c\/li\u003e\n\u003cli\u003eIf U0073 appears alongside U0100, U0121, or U0155, the CAN bus is interrupted — suspect the BCM connector first\u003c\/li\u003e\n\u003cli\u003eUnplug the BCM connector and inspect all 12 terminals for corrosion, moisture, or deformation\u003c\/li\u003e\n\u003cli\u003eMeasure CAN H to CAN L resistance — should be approximately 60Ω with the BCM disconnected (120Ω termination resistors in parallel)\u003c\/li\u003e\n\u003cli\u003eReplace the connector if terminals are corroded; clear all codes and retest\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eVariant Guide\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMale \/ Male 15CM\u003c\/strong\u003e – Plug-side connector, bare or pre-wired\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFemale \/ Female 15CM\u003c\/strong\u003e – Socket-side connector, bare or pre-wired\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMale and Female 20CM\u003c\/strong\u003e – Matched pair with 20cm leads for harness extension or splice repair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What fault codes indicate a failed BCM connector?\u003c\/strong\u003e\u003cbr\u003eA: U0073 (CAN bus off) appearing simultaneously with U0100, U0121, or U0155 (lost communication with multiple modules) is the diagnostic signature of a BCM connector fault. Multiple simultaneous U-codes from different modules confirm the fault is at the connector, not in individual modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can a corroded BCM connector cause the car not to start?\u003c\/strong\u003e\u003cbr\u003eA: Yes. If the BCM connector's CAN bus pins are corroded, the ECU may lose communication with the BCM and disable the immobiliser release signal, preventing the engine from starting. U0073 combined with a no-start condition strongly suggests a BCM connector fault.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if I need the male or female connector?\u003c\/strong\u003e\u003cbr\u003eA: The female connector (socket side) is typically on the BCM module itself. The male connector (plug side) is on the vehicle harness. If you are repairing a damaged harness-side connector, order the male variant. If the module-side connector is damaged, order the female variant.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are terminals included?\u003c\/strong\u003e\u003cbr\u003eA: Yes, terminals are included with all variants.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBody Control Module (BCM) harness — multi-brand\u003c\/li\u003e\n\u003cli\u003eCentral Control Module (CCM) connector\u003c\/li\u003e\n\u003cli\u003eDoor module and multi-function control unit wiring\u003c\/li\u003e\n\u003cli\u003eCAN bus harness repair and extension (12-pin)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Cable Parts Online","offers":[{"title":"Male","offer_id":47831528571125,"sku":"14:202642826#Male","price":11.7,"currency_code":"USD","in_stock":true},{"title":"Female","offer_id":47831528603893,"sku":"14:200004889#Female","price":11.7,"currency_code":"USD","in_stock":true},{"title":"Male 15CM","offer_id":47831528636661,"sku":"14:200004890#Male 15CM","price":18.9,"currency_code":"USD","in_stock":true},{"title":"Female 15CM","offer_id":47831528669429,"sku":"14:200004891#Female 15CM","price":18.9,"currency_code":"USD","in_stock":true},{"title":"Male and Female 20CM","offer_id":47831528702197,"sku":"14:200003699#Male and Female 20CM","price":38.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/Sacb10020b478447e80c662fe32ca82aaT_1febe532-9a02-4d6c-b927-06d6d79e9c34.webp?v=1773629027","url":"https:\/\/www.csldmcml.com\/products\/12-pin-bcm-central-control-module-connector-male-female-oem-can-bus","provider":"Cable Parts Online","version":"1.0","type":"link"}