{"id":506,"date":"2026-08-24T08:15:30","date_gmt":"2026-08-24T08:15:30","guid":{"rendered":"https:\/\/demo.autoboss.com\/index.php\/product\/dm109-automotive-circuit-system-tester\/"},"modified":"2026-10-19T01:45:28","modified_gmt":"2026-10-19T01:45:28","slug":"dm109-automotive-circuit-system-tester","status":"publish","type":"abcat_product","link":"https:\/\/autooltech.com\/cs\/product\/dm109-automotive-circuit-system-tester\/","title":{"rendered":"DM109 Automotive Circuit System Tester"},"content":{"rendered":"<p>AUTOOL DM109 Automotive Circuit System Tester is a professional-grade automotive electrical diagnostic tool integrating a digital multimeter, oscilloscope, component activation, and signal simulation functions. Supporting a wide 9\u201372V voltage range, it is suitable for conventional fuel vehicles, hybrid vehicles, electric vehicles, and various engineering vehicles. With multiple diagnostic functions integrated into one device, the DM109 provides technicians with an efficient and versatile solution for automotive electrical troubleshooting.<\/p>\n<div class=\"abcat-source-description\">\n<h3><strong><b>AUTOOL DM109 Automotive Circuit System Tester <\/b><\/strong><strong><b>Features<\/b><\/strong><\/h3>\n<p><strong><b>Multiple Functions Integrated:<\/b><\/strong>The AUTOOL DM109 integrates a multimeter, oscilloscope, relay tester, fuel injector tester, and actuator driver into one device. It supports testing of 9\u201372V vehicle electrical systems, eliminating the need to switch between multiple devices and enabling comprehensive electrical diagnostics with a single device.<\/p>\n<p><strong><b>Wide Vehicle Compatibility:<\/b><\/strong>Supports 9\u201372V vehicle electrical system testing and is compatible with a full range of 12V\/24V\/36V\/48V\/72V vehicles.<\/p>\n<p><strong><b>Comprehensive Circuit Fault Diagnosis:<\/b><\/strong>Supports voltage and polarity testing, continuity testing, circuit signal testing, resistance and diode testing, automotive indicator light\u00a0and wiring tests, open\/closed circuit testing, poor ground fault detection, and short circuit troubleshooting and localization.<\/p>\n<p><strong><b>Multimeter Function:<\/b><\/strong>Connects to standard multimeter probes, allowing it to function as a digital multimeter for more flexible testing. Supports measurement of voltage, current, resistance, continuity, diode, frequency, and temperature.<\/p>\n<p><strong><b>Component Activation &amp; Test:<\/b><\/strong>Provides three activation modes to directly drive various vehicle electrical components, quickly identifying component faults, wiring faults, and control module issues. It reduces unnecessary disassembly and replacement, improving repair efficiency.<\/p>\n<p><strong><b>Smart <\/b><\/strong><strong><b>Range<\/b><\/strong><strong><b> Recognition:<\/b><\/strong>Built-in intelligent recognition system eliminates the need for manual range switching. The device automatically identifies voltage and resistance and accurately determines circuit polarity.<\/p>\n<p><strong><b>Dual Safety Protection:<\/b><\/strong>Equipped with a dual safety protection system featuring a 20A fuse and intelligent circuit breaker. When a short circuit or overload occurs, the device automatically disconnects the circuit to protect both the testing device\u00a0and the vehicle, ensuring safer operation and preventing potential risks.<\/p>\n<p><strong><b>Firmware Upgrade:<\/b><\/strong>Connect the device to a computer to download and install firmware upgrade packages.\u00a0The device will be continuously updated and iterated, unlocking more features.<\/p>\n<h3><strong><b>Product Details:<\/b><\/strong><\/h3>\n<p><strong><b>2.8-inch Display:<\/b><\/strong>\u00a0Clear image quality, allowing data reading in both strong and dim environments.<\/p>\n<p><strong><b>LED Auxiliary Lighting:<\/b><\/strong>\u00a0No need for an additional handheld flashlight, making circuit inspection in dark areas more convenient.<\/p>\n<\/p><\/div>","protected":false},"excerpt":{"rendered":"<p>AUTOOL DM109 Automotive Circuit System Tester with multimeter, oscilloscope, and signal simulation for 9\u201372V vehicle diagnostics.<\/p>","protected":false},"featured_media":507,"menu_order":0,"template":"","abcat_category":[8],"class_list":["post-506","abcat_product","type-abcat_product","status-publish","has-post-thumbnail","hentry","abcat_category-circuit-tester"],"_links":{"self":[{"href":"https:\/\/autooltech.com\/cs\/wp-json\/wp\/v2\/abcat_product\/506","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/autooltech.com\/cs\/wp-json\/wp\/v2\/abcat_product"}],"about":[{"href":"https:\/\/autooltech.com\/cs\/wp-json\/wp\/v2\/types\/abcat_product"}],"version-history":[{"count":3,"href":"https:\/\/autooltech.com\/cs\/wp-json\/wp\/v2\/abcat_product\/506\/revisions"}],"predecessor-version":[{"id":1606,"href":"https:\/\/autooltech.com\/cs\/wp-json\/wp\/v2\/abcat_product\/506\/revisions\/1606"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/autooltech.com\/cs\/wp-json\/wp\/v2\/media\/507"}],"wp:attachment":[{"href":"https:\/\/autooltech.com\/cs\/wp-json\/wp\/v2\/media?parent=506"}],"wp:term":[{"taxonomy":"abcat_category","embeddable":true,"href":"https:\/\/autooltech.com\/cs\/wp-json\/wp\/v2\/abcat_category?post=506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}