{"product_id":"qpking-m4-motorcycle-scan-tool-for-harley-davidson-4p-6p-compatible-full-system-diagnostics-abs-bleeding-up-to-2023","title":"QPKING M4 Motorcycle Scan Tool for Harley-Davidson - 4P\/6P Compatible, Full-System Diagnostics \u0026 ABS Bleeding (Up to 2023)","description":"\u003cp\u003e\u003cstrong\u003eThe QPKING M4 is a compact, Harley-focused diagnostic scanner that reads\/clears codes, displays live data, runs service functions and performs supported ABS bleeding on compatible Harley-Davidson models up to 2023.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe M4 is built specifically for Harley-Davidson motorcycles with either the round 4-pin or 6-pin diagnostic port and offers deeper motorcycle-focused coverage than a generic OBD2 reader. It connects to the bike’s 12 V power and provides a 2.8-inch multilingual screen for on-bike troubleshooting, system checks and basic adjustments. Firmware updates are applied via an SD card formatted as FAT32 so you can keep the tool current without removing power.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I know if the M4 works with my Harley-Davidson?\u003c\/h3\u003e\n\u003cp\u003eCompatibility depends on the bike’s diagnostic connector and ECU support; confirm your motorcycle has the round 4-pin or 6-pin port and check model-year coverage. The M4 supports many Harley systems but functionality can vary by year and specific ECU.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Harley models with round 4P or 6P diagnostic ports\u003c\/li\u003e\n  \u003cli\u003eVerify model year and ECU support before purchase\u003c\/li\u003e\n  \u003cli\u003eABS bleeding supported on compatible models through 2023 only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat diagnostic functions can the M4 perform on a Harley?\u003c\/h3\u003e\n\u003cp\u003eThe M4 offers full-system reads and clears for supported fault codes, live data streams, ECU information, and a range of service resets and active tests. On compatible motorcycles you can run adjustments and service procedures that help with routine maintenance and troubleshooting.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRead and clear supported diagnostic trouble codes\u003c\/li\u003e\n  \u003cli\u003eView live sensor data and ECU details on the 2.8\" display\u003c\/li\u003e\n  \u003cli\u003eExecute supported service resets and active tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the cables and their differences?\u003c\/h3\u003e\n\u003cp\u003eThe M4 ships with two distinct cables to cover motorcycle-specific functions and basic OBD2 operations. Use the Harley 4P\/6P cable for the bike’s full feature set; the OBD2 16-pin cable provides basic engine code reading and live data for cars only.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHarley 4P\/6P cable: full diagnostics, resets, active tests, and ABS bleeding (when supported)\u003c\/li\u003e\n  \u003cli\u003eOBD2 16P cable: basic car engine codes, clearing and live data only\u003c\/li\u003e\n  \u003cli\u003eAlways connect to the correct port for the intended functions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I operate and update the M4?\u003c\/h3\u003e\n\u003cp\u003eThe device runs from your motorcycle’s 12 V supply and requires no internal battery; its 2.8-inch screen supports 17 languages for on-bike use. Updates are applied with the official update package placed on a FAT32 SD card while the tool remains powered.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNo internal battery — plug into the bike’s 12 V system to operate\u003c\/li\u003e\n  \u003cli\u003e2.8\" display with selectable language options for ease of use\u003c\/li\u003e\n  \u003cli\u003eUpdate firmware via FAT32 SD card without disconnecting power\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The QPKING M4 is aimed at Harley-Davidson owners, home mechanics and professional technicians who need a dedicated motorcycle diagnostic tool that goes beyond basic OBD2 scanning. If you service Harley motorcycles with round 4-pin or 6-pin diagnostic ports and want live data, code management, service resets and supported active tests — including ABS bleeding on eligible models through 2023 — the M4 is built to make diagnostics faster and more precise. It is not intended as a universal solution for non-Harley bikes that lack the required connector or for 2024+ Harley ABS bleeding support.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the M4 support ABS bleeding on all Harley models?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: ABS bleeding is supported only on compatible Harley models through 2023; it is not available for 2024 or newer models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use the M4 on cars with the OBD2 cable?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the OBD2 16P cable provides basic engine code reading, clearing and live data for cars, but not motorcycle-specific functions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"QPKING","offers":[{"title":"Default Title","offer_id":67585094615225,"sku":"B0FJ7YKLC6","price":298.75,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/qpking-m4-front-display.jpg?v=1790467190","url":"https:\/\/redleafauto.ca\/products\/qpking-m4-motorcycle-scan-tool-for-harley-davidson-4p-6p-compatible-full-system-diagnostics-abs-bleeding-up-to-2023","provider":"Redleaf Auto","version":"1.0","type":"link"}