{"id":38337,"date":"2023-07-28T10:19:16","date_gmt":"2023-07-28T02:19:16","guid":{"rendered":"https:\/\/autoolstore.com\/?post_type=product&#038;p=38337"},"modified":"2026-09-14T23:16:59","modified_gmt":"2026-09-15T07:16:59","slug":"utool-dm303-auto-digital-multimeter-car-circuit-tester-with-k-can-oscilloscope-cranking-analog-signal-injector-relay-test","status":"publish","type":"product","link":"https:\/\/autoolstore.com\/product\/utool-dm303-auto-digital-multimeter-car-circuit-tester-with-k-can-oscilloscope-cranking-analog-signal-injector-relay-test\/","title":{"rendered":"AUTOOL DM303 Automotive Diagnostic Multimeter"},"content":{"rendered":"\n\n\r\n<div class=\"autool-page-shell\"><main class=\"autool-description autool-product-page\" data-autool-lightbox=\"off\" data-autool-mobile-nav=\"false\" data-autool-rail-controls=\"true\" id=\"dm303-product-page\"><section class=\"autool-section autool-product-hero autool-section--overview\" data-autool-nav=\"Overview\" data-autool-surface=\"dark\" id=\"autool-overview\"><div class=\"autool-layout-container autool-product-hero__grid\">\r\n<div class=\"autool-product-hero__copy\">\r\n<p class=\"autool-product-hero__eyebrow\">AUTOOL DM303 \u00b7 Automotive Multimeter and Oscilloscope<\/p>\r\n<h2 class=\"autool-product-hero__title\">Bring Vehicle-Focused Electrical Tests Together<\/h2>\r\n<p class=\"autool-product-hero__lead\">Bring vehicle-focused electrical measurements, waveform observation, and selected component tests into one handheld kit. DM303 supports cranking and ignition checks, compatible injector and relay tests, signal output, and K\/CAN line viewing in dedicated modes for broader vehicle-circuit work across workshop and mobile service tasks.<\/p>\r\n<ul aria-label=\"DM303 key benefits\" class=\"autool-product-hero__capabilities\">\r\n<li>DMM + Automotive Scope<\/li>\r\n<li>Cranking + Ignition Modes<\/li>\r\n<li>Injector + Relay Test Modes<\/li>\r\n<li>5 V \/ 12 V Signal Outputs<\/li>\r\n<li>K \/ CAN Line Observation<\/li>\r\n<\/ul>\r\n<nav aria-label=\"DM303 sections\" class=\"autool-product-hero__actions\"><a class=\"autool-product-button autool-product-button--primary\" href=\"#autool-features\">Explore Features<\/a><a class=\"autool-product-button\" href=\"#autool-use\">View Workflow<\/a><a class=\"autool-product-button\" href=\"#autool-comparison\">Specs &amp; Compare<\/a><\/nav>\r\n<\/div>\r\n<figure class=\"autool-product-hero__media\"><img alt=\"AUTOOL DM303 auto diagnostic multimeter with multimeter oscilloscope ignition pulse K CAN line data color display and toolbox features\" decoding=\"async\" fetchpriority=\"high\" loading=\"eager\" src=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2023\/07\/autool-dm303-diagnostic-multimeter-overview-10.jpg\"\/><\/figure>\r\n<\/div><\/section><aside aria-label=\"DM303 at a glance\" class=\"autool-product-metrics\"><div class=\"autool-product-metrics__inner\">\r\n<div class=\"autool-product-metric\">\r\n<strong>2.8 in<\/strong><span>Color Display<\/span>\r\n<\/div>\r\n<div class=\"autool-product-metric\">\r\n<strong>4 \u00d7 1.5 V<\/strong><span>Dry-Battery Option<\/span>\r\n<\/div>\r\n<div class=\"autool-product-metric\">\r\n<strong>Rear stand<\/strong><span>Upright Viewing<\/span>\r\n<\/div>\r\n<div class=\"autool-product-metric\">\r\n<strong>True RMS<\/strong><span>AC Measurement<\/span>\r\n<\/div>\r\n<\/div><\/aside><section class=\"autool-section autool-product-section--soft autool-section--value\" data-autool-surface=\"base\" id=\"autool-features\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Key Features<\/p>\r\n<h2 class=\"autool-title\">Meter, Scope and Automotive Signal Tools<\/h2><\/header><div class=\"autool-product-grid autool-product-grid--3 autool-product-rail\" data-autool-rail=\"features\">\r\n<article class=\"autool-product-card\"><h3>True RMS Auto-Ranging Multimeter<\/h3>\r\n<p>Measures DC \/ AC voltage, current, resistance, diode, and frequency. Auto range helps reduce manual range selection, while True RMS improves reading reliability for electrical testing.<\/p><\/article><article class=\"autool-product-card\"><h3>Oscilloscope Mode<\/h3>\r\n<p>The product page lists 500 kHz analog bandwidth, while the current model PDF lists 200 kHz. Confirm the delivered hardware, firmware and manual version before choosing DM303 for a bandwidth-dependent task; neither figure is the sampling rate.<\/p><\/article><article class=\"autool-product-card\"><h3>Automotive Circuit Test<\/h3>\r\n<p>Supports automotive circuit voltage and drive-current checks. It can help check battery voltage, vehicle circuits, ECU-related wiring, and other electrical parts through the proper test leads.<\/p><\/article><article class=\"autool-product-card\"><h3>Injector And Relay Test<\/h3>\r\n<p>DM303 lists drive and observation modes for supported electromagnetic injectors, excluding 120 V injectors, plus relay testing. Confirm component type, pinout, supply, current and permitted output mode; never drive an ECU output, SRS, data line or unknown module.<\/p><\/article><article class=\"autool-product-card\"><h3>Analog Signal And K\/CAN Line Data<\/h3>\r\n<p>The listed outputs are 5 V square, 5 Vpp sine and 12 V square. Use them only on a documented permitted load and pin after confirming source impedance\/current limits for the delivered version; do not inject into powered data lines, ECU outputs, SRS or unknown modules. K\/CAN observation is not a full vehicle scan.<\/p><\/article><article class=\"autool-product-card\"><h3>Dedicated Automotive Test Modes<\/h3>\r\n<p>DM303 adds injector, relay, cranking, signal simulation, and K\/CAN line checks to multimeter and oscilloscope functions. Injector testing does not support 120V injectors.<\/p><\/article><article class=\"autool-product-card\"><h3>Color Screen, Multiple Languages<\/h3>\r\n<p>The brightness-adjustable 2.8-inch color screen presents test menus in multiple supported languages, including English, French, Spanish, German, and Chinese.<\/p><\/article><article class=\"autool-product-card\"><h3>Portable Electrical Test Kit<\/h3>\r\n<p>The toolbox stores DM303 and its test leads together for transport and organized storage.<\/p><\/article><article class=\"autool-product-card\"><h3>Flexible Battery Setup<\/h3>\r\n<p>Use compatible dry batteries or an optional compatible lithium battery, purchased separately. Only the rechargeable lithium battery option may be charged through the device.<\/p><\/article><article class=\"autool-product-card\"><h3>Handheld Controls And Connections<\/h3>\r\n<p>DM303 brings its display, navigation keys, and separate measurement inputs into one handheld unit with a rear stand.<\/p><\/article><article class=\"autool-product-card\"><h3>3 Years Warranty Support<\/h3><p>Main unit: 3-year warranty. Standard accessories: 1-year warranty. <a href=\"https:\/\/autoolstore.com\/warranty-policy\/\" rel=\"noopener\" target=\"_blank\">Warranty Policy<\/a>.<\/p><\/article><\/div>\r\n<\/div><\/section><section class=\"autool-section autool-section--workflow autool-section--workflow-anchor\" data-autool-surface=\"dark\" id=\"autool-use\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Service Workflow<\/p>\r\n<h2 class=\"autool-title\">Select the Vehicle Test and Verify Connections<\/h2><\/header><div class=\"autool-workflow\" data-autool-workflow=\"\" data-workflow-mode=\"panels\">\r\n<div aria-label=\"dm303 workflow\" class=\"autool-workflow__tabs\" data-workflow-tabs=\"\" role=\"tablist\">\r\n<button aria-controls=\"dm303-panel-0\" aria-selected=\"true\" class=\"autool-workflow__tab\" data-workflow-step=\"0\" id=\"dm303-tab-0\" role=\"tab\" tabindex=\"0\" type=\"button\">01<br\/><wbr\/>Define<wbr\/> the<wbr\/> Measurement<\/button><button aria-controls=\"dm303-panel-1\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"1\" id=\"dm303-tab-1\" role=\"tab\" tabindex=\"-1\" type=\"button\">02<br\/><wbr\/>Inspect<wbr\/> Leads<wbr\/> and<wbr\/> Ratings<\/button><button aria-controls=\"dm303-panel-2\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"2\" id=\"dm303-tab-2\" role=\"tab\" tabindex=\"-1\" type=\"button\">03<br\/><wbr\/>Select<wbr\/> the<wbr\/> Mode<\/button><button aria-controls=\"dm303-panel-3\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"3\" id=\"dm303-tab-3\" role=\"tab\" tabindex=\"-1\" type=\"button\">04<br\/><wbr\/>Qualify<wbr\/> Active<wbr\/> Output<\/button><button aria-controls=\"dm303-panel-4\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"4\" id=\"dm303-tab-4\" role=\"tab\" tabindex=\"-1\" type=\"button\">05<br\/><wbr\/>Probe<wbr\/> the<wbr\/> Circuit<\/button><button aria-controls=\"dm303-panel-5\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"5\" id=\"dm303-tab-5\" role=\"tab\" tabindex=\"-1\" type=\"button\">06<br\/><wbr\/>Record<wbr\/> and<wbr\/> Verify<\/button>\r\n<\/div>\r\n<div class=\"autool-workflow__position\">\r\n<span class=\"autool-workflow__position-label\">Step progress<\/span><span class=\"autool-workflow__progress\"><span class=\"autool-workflow__progress-bar\" data-workflow-progress=\"\"><\/span><\/span><span class=\"autool-workflow__position-count\" data-workflow-count=\"\">1 \/ 6<\/span>\r\n<\/div>\r\n<div class=\"autool-workflow__content\">\r\n<div class=\"autool-workflow__main\">\r\n<div class=\"autool-workflow__panels\">\r\n<article aria-labelledby=\"dm303-tab-0\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" id=\"dm303-panel-0\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">01<\/div>\r\n<h3 class=\"autool-workflow__title\">Define the Measurement<\/h3>\r\n<p class=\"autool-workflow__description\">Use the wiring diagram to identify the expected signal, reference point and safe measurement mode.<\/p><\/article><article aria-labelledby=\"dm303-tab-1\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"dm303-panel-1\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">02<\/div>\r\n<h3 class=\"autool-workflow__title\">Inspect Leads and Ratings<\/h3>\r\n<p class=\"autool-workflow__description\">Confirm the instrument, terminal, fuse, lead and probe ratings for the selected task before connecting.<\/p><\/article><article aria-labelledby=\"dm303-tab-2\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"dm303-panel-2\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">03<\/div>\r\n<h3 class=\"autool-workflow__title\">Select the Mode<\/h3>\r\n<p class=\"autool-workflow__description\">Choose the supported voltage, current, resistance, continuity, frequency or other model-specific function and start on a safe range.<\/p><\/article><article aria-labelledby=\"dm303-tab-3\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"dm303-panel-3\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">04<\/div>\r\n<h3 class=\"autool-workflow__title\">Qualify Active Output<\/h3>\r\n<p class=\"autool-workflow__description\">Before injector, relay or signal output, confirm component type, pinout, supply, permitted mode, current and source-impedance limits. Keep output off ECU outputs, SRS circuits, powered data lines and unknown modules.<\/p><\/article><article aria-labelledby=\"dm303-tab-4\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"dm303-panel-4\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">05<\/div>\r\n<h3 class=\"autool-workflow__title\">Probe the Circuit<\/h3>\r\n<p class=\"autool-workflow__description\">Connect to the correct reference and test point without bridging terminals; use back-probing accessories only where appropriate.<\/p><\/article><article aria-labelledby=\"dm303-tab-5\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"dm303-panel-5\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">06<\/div>\r\n<h3 class=\"autool-workflow__title\">Record and Verify<\/h3>\r\n<p class=\"autool-workflow__description\">Save or note the value and operating state, then compare it with the vehicle specification and a second check before assigning a root cause.<\/p><\/article>\r\n<\/div>\r\n<div class=\"autool-workflow__actions\">\r\n<button class=\"autool-workflow__button\" data-workflow-prev=\"\" disabled=\"\" type=\"button\">\u2190 Previous<\/button><button class=\"autool-workflow__button autool-workflow__button--next\" data-workflow-next=\"\" type=\"button\">Next step \u2192<\/button>\r\n<\/div>\r\n<\/div>\r\n<aside class=\"autool-workflow__safety\" data-workflow-safety=\"\"><h3 class=\"autool-workflow__safety-title\">Before You Start<\/h3>\r\n<ul class=\"autool-workflow__safety-list\">\r\n<li>Injector drive and 5 V square, 5 Vpp sine or 12 V square outputs require a documented permitted pin and load. Output amplitude alone does not define safe current, impedance or duty for an unknown circuit.<\/li>\r\n<li>You can install 4pcs 1.5V dry batteries for normal use. Do not charge dry batteries through the device.<\/li>\r\n<\/ul><\/aside>\r\n<\/div>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--soft\" data-autool-surface=\"base\" id=\"autool-safety\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Safe Use<\/p>\r\n<h2 class=\"autool-title\">Control Output, Bus and Input Connections<\/h2><\/header><div class=\"autool-product-grid autool-product-grid--3 autool-product-rail\" data-autool-rail=\"safety\">\r\n<article class=\"autool-product-card\"><h3>Limit Active Output<\/h3>\r\n<p>Injector drive and 5 V square, 5 Vpp sine or 12 V square outputs require a documented permitted pin and load. Output amplitude alone does not define safe current, impedance or duty for an unknown circuit.<\/p><\/article><article class=\"autool-product-card\"><h3>Dry Battery Option<\/h3>\r\n<p>You can install 4pcs 1.5V dry batteries for normal use. Do not charge dry batteries through the device.<\/p><\/article><article class=\"autool-product-card\"><h3>Charge Only Lithium Setup<\/h3>\r\n<p>If a compatible rechargeable lithium battery is installed, it can be charged. Dry batteries must not be charged.<\/p><\/article><article class=\"autool-product-card\"><h3>Batteries Are Not Included<\/h3>\r\n<p>DM303 \/ DM301 is shipped without batteries due to shipping and battery restrictions. Batteries need to be purchased separately.<\/p><\/article><article class=\"autool-product-card\"><h3>Lithium Battery Option<\/h3>\r\n<p>You may install a compatible lithium battery by yourself. The reference image shows a 503450 3.7V 1000mAh lithium battery style.<\/p><\/article><article class=\"autool-product-card\"><h3>Interpret the Result in Context<\/h3>\r\n<p>Keep measurement, waveform, protocol observation and active output as separate modes. A meter fuse or input rating does not authorize power or signal injection into an ECU, SRS circuit, sensor or data line.<\/p><\/article>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--white\" data-autool-surface=\"white\" id=\"autool-results\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Result Guide<\/p>\r\n<h2 class=\"autool-title\">Read the Result Before Deciding the Next Step<\/h2><\/header><div class=\"autool-product-grid autool-product-grid--3 autool-product-rail\"><article class=\"autool-product-card\"><h3>Cranking Test<\/h3>\r\n<p>During vehicle starting, a minimum battery voltage above 9.6V is generally considered normal. If the value drops below 9.6V, the battery may be aging or weak.<\/p><\/article><\/div>\r\n<\/div><\/section><section class=\"autool-section autool-comparison\" data-autool-nav=\"Spec&amp;Comparison\" data-autool-surface=\"dark\" id=\"autool-comparison\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Model Comparison<\/p>\r\n<h2 class=\"autool-title\">Choose the Right Electrical Test Tool<\/h2><\/header><div class=\"autool-model-compare\" data-autool-model-compare=\"\" data-current-model=\"dm303\">\r\n<button aria-controls=\"compare47-11_dm303-compare-model-picker\" aria-expanded=\"false\" aria-label=\"Open model comparison selector\" class=\"autool-model-compare__mobile-trigger\" data-compare-picker-open=\"\" type=\"button\"><span class=\"autool-model-compare__mobile-trigger-copy\"><strong>Compare models<\/strong><span data-compare-mobile-summary=\"\">Selected: DM303<\/span><\/span><span class=\"autool-model-compare__mobile-trigger-count\" data-compare-mobile-count=\"\">1<\/span><\/button>\r\n<button aria-label=\"Close model selector\" class=\"autool-model-compare__scrim\" data-compare-picker-close=\"\" tabindex=\"-1\" type=\"button\"><\/button>\r\n<div aria-labelledby=\"compare47-11_dm303-compare-picker-title\" class=\"autool-model-compare__selector\" id=\"compare47-11_dm303-compare-model-picker\" role=\"group\">\r\n<div class=\"autool-model-compare__selector-head\">\r\n<div class=\"autool-model-compare__selector-copy\">\r\n<h3 class=\"autool-model-compare__legend\" id=\"compare47-11_dm303-compare-picker-title\">Model Guide<\/h3>\r\n<p class=\"autool-model-compare__instruction\">Choose one or more models. DM303 is selected by default.<\/p>\r\n<\/div>\r\n<div class=\"autool-model-compare__selector-tools\">\r\n<div class=\"autool-model-compare__count\" data-compare-count=\"\">1 model selected<\/div>\r\n<button aria-label=\"Close model selector\" class=\"autool-model-compare__picker-close\" data-compare-picker-close=\"\" type=\"button\">\u00d7<\/button>\r\n<\/div>\r\n<\/div>\r\n<div aria-label=\"Models available for comparison\" class=\"autool-model-compare__grid\" role=\"list\"><label class=\"autool-model-option\" data-model-card=\"dm301\" role=\"listitem\"><input data-model-checkbox=\"\" type=\"checkbox\" value=\"dm301\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">DM301<\/strong><span class=\"autool-model-option__tier\">6 functions \/ 2 leads \/ 2.8-inch<\/span><\/span><\/label><label class=\"autool-model-option autool-is-selected\" data-model-card=\"dm303\" role=\"listitem\"><input checked=\"\" data-model-checkbox=\"\" type=\"checkbox\" value=\"dm303\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">DM303<\/strong><span class=\"autool-model-option__tier\">12 functions \/ 6 leads \/ 5 A drive<\/span><\/span><span class=\"autool-model-option__current\">Current model<\/span><\/label><label class=\"autool-model-option\" data-model-card=\"dm208\" role=\"listitem\"><input data-model-checkbox=\"\" type=\"checkbox\" value=\"dm208\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">DM208<\/strong><span class=\"autool-model-option__tier\">Thermal imager \/ 25,000 counts \/ 32 \u00d7 32 IR<\/span><\/span><\/label><\/div>\r\n<div class=\"autool-model-compare__selection-bar\">\r\n<p aria-live=\"polite\" class=\"autool-model-compare__status\" data-compare-status=\"\" id=\"compare47-11_dm303-compare-result-status\" role=\"status\">DM303 is selected. Choose another model to compare.<\/p>\r\n<div class=\"autool-model-compare__selection-actions\">\r\n<button class=\"autool-model-compare__clear\" data-compare-clear=\"\" disabled=\"\" type=\"button\">Reset selection<\/button><button class=\"autool-model-compare__done\" data-compare-picker-close=\"\" type=\"button\">Done<\/button>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<div class=\"autool-model-compare__result\" data-compare-result=\"\">\r\n<div class=\"autool-model-compare__result-toolbar\">\r\n<h3 class=\"autool-model-compare__result-title\" data-compare-title=\"\" id=\"compare47-11_dm303-compare-result-title\">DM303 comparison<\/h3>\r\n<label aria-disabled=\"true\" class=\"autool-model-compare__difference-toggle\" data-differences-label=\"\"><input data-differences-only=\"\" disabled=\"\" type=\"checkbox\"\/> Show differences only<\/label>\r\n<\/div>\r\n<div data-compare-table=\"\">\r\n<div class=\"autool-compare-matrix__empty\" hidden=\"\">No model is selected. Choose a model to compare.<\/div>\r\n<div aria-describedby=\"compare47-11_dm303-compare-result-status\" aria-labelledby=\"compare47-11_dm303-compare-result-title\" class=\"autool-compare-matrix-wrap\" role=\"region\" tabindex=\"0\">\r\n<table aria-label=\"Product comparison\" class=\"autool-compare-matrix\" data-autool-columns=\"1\"><colgroup><col class=\"autool-compare-matrix__criteria-col\"\/><col class=\"autool-compare-matrix__model-col\" data-compare-model=\"dm301\" hidden=\"\"\/><col class=\"autool-compare-matrix__model-col\" data-compare-model=\"dm303\"\/><col class=\"autool-compare-matrix__model-col\" data-compare-model=\"dm208\" hidden=\"\"\/><\/colgroup><thead><tr><th scope=\"col\">Product Name<\/th><th data-compare-model=\"dm301\" hidden=\"\" scope=\"col\">DM301<\/th><th data-compare-model=\"dm303\" scope=\"col\">DM303<\/th><th data-compare-model=\"dm208\" hidden=\"\" scope=\"col\">DM208<\/th><\/tr><\/thead><tbody><tr class=\"autool-compare-matrix__category\" data-compare-category=\"group47-1\">\r\n<th class=\"autool-compare-matrix__category-label\" scope=\"rowgroup\"><span class=\"autool-compare-matrix__category-label-inner\">Measurement &amp; Readout<\/span><\/th>\r\n<td class=\"autool-compare-matrix__category-track\" colspan=\"1\" data-compare-category-track=\"\"><span aria-hidden=\"true\" class=\"autool-compare-matrix__category-progress\" data-autool-progress-order-ready=\"yes\" data-compare-category-progress=\"\"><span class=\"autool-compare-matrix__category-progress-label\">Slide \/ drag<\/span><span class=\"autool-compare-matrix__category-progress-meter\"><span class=\"autool-compare-matrix__category-progress-bar\"><\/span><\/span><span class=\"autool-compare-matrix__category-progress-count\" data-compare-category-count=\"\">1 \/ 1<\/span><\/span><\/td>\r\n<\/tr><tr data-compare-group=\"group47-1\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Display Screen<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">2.8-inch Color Screen<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">2.8-inch Color Screen<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">2.4-inch, 320 \u00d7 240<\/div><\/td><\/tr><tr data-compare-group=\"group47-1\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Languages<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">13 Types<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">13 Types<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-1\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Voltage Measurement Range<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">AC: 0-700V DC: 0-1000V<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">AC: 0-700V DC: 0-1000V<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-1\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Current Measurement Range<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">0\u201320 A (20 A maximum; 10 A continuous); 0\u2013200 mA<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">0\u201320 A (20 A maximum; 10 A continuous); 0\u2013200 mA<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-1\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Resistance Measurement Range<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">0-1M\u03a9<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">0-1M\u03a9<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-1\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Frequency Measurement Range<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">0-1MHz<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">0-1MHz<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-1\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Data Lock\/Clear<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">\u2713<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">\u2713<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr class=\"autool-compare-matrix__category\" data-compare-category=\"group47-2\">\r\n<th class=\"autool-compare-matrix__category-label\" scope=\"rowgroup\"><span class=\"autool-compare-matrix__category-label-inner\">Automotive Functions &amp; Fit<\/span><\/th>\r\n<td class=\"autool-compare-matrix__category-track\" colspan=\"1\" data-compare-category-track=\"\"><span aria-hidden=\"true\" class=\"autool-compare-matrix__category-progress\" data-autool-progress-order-ready=\"yes\" data-compare-category-progress=\"\"><span class=\"autool-compare-matrix__category-progress-label\">Slide \/ drag<\/span><span class=\"autool-compare-matrix__category-progress-meter\"><span class=\"autool-compare-matrix__category-progress-bar\"><\/span><\/span><span class=\"autool-compare-matrix__category-progress-count\" data-compare-category-count=\"\">1 \/ 1<\/span><\/span><\/td>\r\n<\/tr><tr data-compare-group=\"group47-2\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Basic Functions<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">6 Types<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">12 Types<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-2\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Automotive Circuit Drive Current<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">\u00d7<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">Maximum Output: 5A Maximum Input: 5A<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-2\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Fuel Injector Drive Signal Output<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">\u00d7<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">500-6000rpm<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-2\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Detection Mode<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Voltage Measurement Current Measurement Resistance Measurement Frequency Measurement Oscilloscope Mode Ignition Pulse Signal Testing<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">Current Measurement Resistance Measurement Frequency Measurement Oscilloscope Mode Fuel Injector Testing Relay Testing Automotive Circuit Testing Automotive Starting Testing Signal Simulation Testing CAN Line Data Reading Ignition Pulse Signal Testing K\/LIN Line Data Reading<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-2\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Applicable Vehicle Models<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Trucks, Sedans, Buses, Electric Vehicles, and Other Vehicle Types<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">Trucks, Sedans, Buses, Electric Vehicles, and Other Vehicle Types<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr class=\"autool-compare-matrix__category\" data-compare-category=\"group47-3\">\r\n<th class=\"autool-compare-matrix__category-label\" scope=\"rowgroup\"><span class=\"autool-compare-matrix__category-label-inner\">Power &amp; Equipment<\/span><\/th>\r\n<td class=\"autool-compare-matrix__category-track\" colspan=\"1\" data-compare-category-track=\"\"><span aria-hidden=\"true\" class=\"autool-compare-matrix__category-progress\" data-autool-progress-order-ready=\"yes\" data-compare-category-progress=\"\"><span class=\"autool-compare-matrix__category-progress-label\">Slide \/ drag<\/span><span class=\"autool-compare-matrix__category-progress-meter\"><span class=\"autool-compare-matrix__category-progress-bar\"><\/span><\/span><span class=\"autool-compare-matrix__category-progress-count\" data-compare-category-count=\"\">1 \/ 1<\/span><\/span><\/td>\r\n<\/tr><tr data-compare-group=\"group47-3\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Power Supply Method<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Dry Battery TYPE-C [Optional] Lithium Battery<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">Dry Battery TYPE-C 12V Rechargeable Battery [Optional] Lithium Battery<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Built-in 2000 mAh lithium battery<\/div><\/td><\/tr><tr data-compare-group=\"group47-3\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Accessories<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">2 Types of Test Leads<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">6 Types of Test Leads<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-3\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Flashlight Function<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">\u2713<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">\u2713<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr data-compare-group=\"group47-3\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Equipped Toolbox<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">\u2713<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">\u2713<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><\/tr><tr class=\"autool-compare-matrix__category\" data-compare-category=\"group47-4\">\r\n<th class=\"autool-compare-matrix__category-label\" scope=\"rowgroup\"><span class=\"autool-compare-matrix__category-label-inner\">Product Details<\/span><\/th>\r\n<td class=\"autool-compare-matrix__category-track\" colspan=\"1\" data-compare-category-track=\"\"><span aria-hidden=\"true\" class=\"autool-compare-matrix__category-progress\" data-autool-progress-order-ready=\"yes\" data-compare-category-progress=\"\"><span class=\"autool-compare-matrix__category-progress-label\">Slide \/ drag<\/span><span class=\"autool-compare-matrix__category-progress-meter\"><span class=\"autool-compare-matrix__category-progress-bar\"><\/span><\/span><span class=\"autool-compare-matrix__category-progress-count\" data-compare-category-count=\"\">1 \/ 1<\/span><\/span><\/td>\r\n<\/tr><tr data-compare-group=\"group47-4\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Infrared resolution<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">32 \u00d7 32<\/div><\/td><\/tr><tr data-compare-group=\"group47-4\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Frame rate<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">7 frames\/second<\/div><\/td><\/tr><tr data-compare-group=\"group47-4\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Temperature range<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">-20\u00b0C to 550\u00b0C<\/div><\/td><\/tr><tr data-compare-group=\"group47-4\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Thermal accuracy<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">\u00b12\u00b0C or 2% (maker specification)<\/div><\/td><\/tr><tr data-compare-group=\"group47-4\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Emissivity<\/th><td data-compare-model=\"dm301\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm303\"><div class=\"autool-compare-matrix__value\">Not stated<\/div><\/td><td data-compare-model=\"dm208\" hidden=\"\"><div class=\"autool-compare-matrix__value\">0.10 to 1.00 adjustable<\/div><\/td><\/tr><\/tbody><\/table>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--cool autool-section--downloads\" data-autool-surface=\"cool\" id=\"autool-download\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Manual &amp; Support<\/p>\r\n<h2 class=\"autool-title\">Find the Manual and Measurement Guidance<\/h2><\/header><div aria-label=\"DM303 manual download and setup support\" class=\"autool-product-rail autool-resources-grid autool-mobile-rail\" data-autool-rail=\"resources\">\r\n<article class=\"autool-resource-download autool-resource-panel\"><div class=\"autool-resource-media\"><img loading=\"lazy\" alt=\"AUTOOL DM303 user manual cover\" decoding=\"async\" height=\"300\" loading=\"lazy\" src=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2024\/03\/autool-dm303-user-manual-pdf.jpg\" width=\"212\"\/> <\/div><div class=\"autool-resource-body\"><span class=\"autool-resource-meta\">Manual \/ PDF<\/span><h3>AUTOOL DM303 User Manual<\/h3><p>Open the PDF manual for AUTOOL DM303 multimeter and oscilloscope modes, cranking and ignition checks, injector and relay tests, signal output, safety and troubleshooting support.<\/p><div class=\"autool-resource-actions\"><a class=\"autool-product-button\" href=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2024\/03\/autool-dm303-user-manual.pdf\" rel=\"noopener\" target=\"_blank\">Download Manual<\/a><\/div><\/div><\/article><aside class=\"autool-resource-panel autool-section--support\" id=\"autool-support\"><div class=\"autool-resource-body\"><span class=\"autool-resource-meta\">Setup Help<\/span><h3>Need Help Choosing the Right Setup?<\/h3><p>Contact AUTOOL Store before ordering for help with manual versions, installation steps, compatibility, accessories, safe-use instructions, or after-sales support.<\/p><dl class=\"autool-support-list\"><div><dt>Email<\/dt><dd><a href=\"mailto:support@autoolstore.com\">support@autoolstore.com<\/a><\/dd><\/div><div><dt>WhatsApp<\/dt><dd><a href=\"https:\/\/wa.me\/8618926477404\" target=\"_blank\" rel=\"noopener\">+86 189 2647 7404<\/a><\/dd><\/div><\/dl><div class=\"autool-resource-actions\"><a class=\"autool-product-button\" href=\"mailto:support@autoolstore.com\">EMAIL<\/a><a class=\"autool-product-button\" href=\"https:\/\/wa.me\/8618926477404\" rel=\"noopener\" target=\"_blank\">WHATSAPP<\/a><\/div><\/div><\/aside>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--warm autool-section--package\" data-autool-surface=\"warm\" id=\"autool-box\"><div class=\"autool-layout-container\">\r\n<div class=\"autool-package-layout\">\r\n<figure class=\"autool-package-media\"><img decoding=\"async\" alt=\"AUTOOL DM303 packing list with main unit manual retail box toolbox and multiple test leads\" src=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2023\/07\/autool-dm303-package-contents-07.jpg\"\/> <\/figure>\r\n<div class=\"autool-package-copy\"><p class=\"autool-subhead\">Package Contents<\/p>\r\n<h2 class=\"autool-title\">See What Comes in the Box<\/h2><ul aria-label=\"DM303 package contents\" class=\"autool-package-list autool-product-rail\" data-autool-rail=\"package\">\r\n<li>\r\n<span>Main Unit<\/span><strong>AUTOOL DM303 auto diagnostic multimeter<\/strong><\/li>\r\n<li>\r\n<span>Storage<\/span><strong>Portable protective toolbox and retail box<\/strong><\/li>\r\n<li>\r\n<span>Documentation<\/span><strong>User manual<\/strong><\/li>\r\n<li>\r\n<span>Test Leads<\/span><strong>Multifunction test lead, battery clip cable, multimeter probes, jumper \/ adapter cables, and additional test leads<\/strong><\/li>\r\n<li>\r\n<span>Battery<\/span><strong>Notice Batteries are not included. Use 4pcs 1.5V dry batteries or a compatible lithium battery setup according to the battery rules.<\/strong><\/li>\r\n<\/ul><\/div>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--white autool-section--faq\" data-autool-nav=\"FAQ\" data-autool-surface=\"white\" id=\"autool-faq-description\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Buyer Questions<\/p>\r\n<h2 class=\"autool-title\">Electrical Connection and Measurement Questions<\/h2><\/header><div class=\"autool-faq-grid\">\r\n<details><summary>Does AUTOOL DM303 Include Batteries?<\/summary><div class=\"autool-faq-answer\"><p>No. DM303 \/ DM301 is shipped without batteries. You need to buy batteries separately. You can use 4pcs 1.5V dry batteries, or install a compatible lithium battery setup by yourself.<\/p><\/div><\/details><details><summary>Can I Charge Dry Batteries Inside DM303?<\/summary><div class=\"autool-faq-answer\"><p>No. Do not charge dry batteries. Only a compatible rechargeable lithium battery setup can be charged. If you are not sure whether your battery is rechargeable or compatible, contact AUTOOL Store before charging.<\/p><\/div><\/details><details><summary>What Lithium Battery Style Is Shown For DM303?<\/summary><div class=\"autool-faq-answer\"><p>The reference image shows a 503450 3.7V 1000mAh lithium battery style. Confirm the connector, size, and compatibility before installing a lithium battery.<\/p><\/div><\/details><details><summary>What Is The Difference Between DM301 And DM303?<\/summary><div class=\"autool-faq-answer\"><p>DM301 focuses on basic measurement functions such as voltage, current, resistance, frequency, oscilloscope, and ignition pulse signal testing. DM303 adds more automotive diagnostic functions, including fuel injector testing, relay testing, automotive circuit testing, cranking test, signal simulation, CAN line data reading, and K\/LIN-related line data reading.<\/p><\/div><\/details><details><summary>Does DM303 Support Injector Testing?<\/summary><div class=\"autool-faq-answer\"><p>Yes. DM303 can drive supported electromagnetic injectors, including supported GDI injectors, and can detect real-time injector signals; it does not support 120V injectors. Confirm injector type, pinout, supply, current, and the vehicle procedure before output. A drive response does not by itself prove spray pattern, flow, or root cause, and active output must stay off ECU outputs, SRS circuits, powered data lines, and unknown modules.<\/p><\/div><\/details><details><summary>What Does The Cranking Test Result Mean?<\/summary><div class=\"autool-faq-answer\"><p>During vehicle startup, DM303 records the minimum battery voltage and uses 9.6V as a general reference. A lower reading can indicate a weak or aging battery or a starting-system issue that needs further inspection. Apply the battery maker or vehicle procedure for the battery type, temperature, and state of charge.<\/p><\/div><\/details><details><summary>What Measurement Ranges Does DM303 Support?<\/summary><div class=\"autool-faq-answer\"><p>The page lists DC 0\u20131000V and AC 0\u2013700V voltage, 0\u201320A and 0\u2013200mA current, 0\u20131M\u03a9 resistance and 1Hz\u20131MHz frequency ranges. The manual distinguishes 20A maximum from 10A continuous current. These values remain subject to the selected terminal, mode, probe and CAT conditions.<\/p><\/div><\/details><details><summary>Can DM303 Replace A Full Vehicle Diagnostic Scanner?<\/summary><div class=\"autool-faq-answer\"><p>No. DM303 is an automotive diagnostic multimeter and circuit \/ signal testing tool. K\/CAN line data reading helps with circuit-level diagnosis, but it should not be described as a complete vehicle diagnostic scanner.<\/p><\/div><\/details><details><summary>What Accessories Are Included?<\/summary><div class=\"autool-faq-answer\"><p>Package contents: DM303 main unit, user manual, retail box, portable toolbox, multifunction test lead, battery clip cable, multimeter probes, jumper \/ adapter cables, and additional test leads. Batteries are not included.<\/p><\/div><\/details><details><summary>Which Languages Does DM303 Support?<\/summary><div class=\"autool-faq-answer\"><p>DM303 supports a multi-language interface, including English, French, Portuguese, Polish, Spanish, Japanese, Russian, Italian, German, Dutch, Korean, Chinese, and other supported firmware options. If a specific language is required, confirm before ordering.<\/p><\/div><\/details><details><summary>How Long Is The Warranty?<\/summary><div class=\"autool-faq-answer\"><p>Main unit: 3-year warranty. Standard accessories: 1-year warranty. <a href=\"https:\/\/autoolstore.com\/warranty-policy\/\" rel=\"noopener\" target=\"_blank\">Warranty Policy<\/a>.<\/p><\/div><\/details>\r\n<\/div>\r\n<\/div><\/section><\/main><\/div>\r\n\r\n","protected":false},"excerpt":{"rendered":"<ul>\n<li><strong>True RMS DMM + Oscilloscope:<\/strong> Combine True RMS auto-ranging electrical measurements with oscilloscope waveform observation.<\/li>\n<li><strong>Cranking, Ignition + Vehicle Signals:<\/strong> Check cranking behavior, ignition pulses, and dedicated vehicle signals from one handheld unit.<\/li>\n<li><strong>Injector + Relay Testing:<\/strong> Use the supported drive and observation modes for electromagnetic injectors, excluding 120 V injectors, plus compatible relays.<\/li>\n<li><strong>5 V \/ 12 V Signals + K\/CAN View:<\/strong> Generate 5 V square, 5 Vpp sine, or 12 V square signals and observe K\/CAN line data in the dedicated modes.<\/li>\n<li><strong>2.8-Inch Multi-Language Screen:<\/strong> Read menus on the brightness-adjustable color screen and carry the tester with its leads in the toolbox.<\/li>\n<\/ul>\n","protected":false},"featured_media":78997,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":""},"product_brand":[448],"product_cat":[1071,1063],"product_tag":[1037,947,940,939,1038,945],"hf_cat_product":[4543],"class_list":["post-38337","product","type-product","status-publish","has-post-thumbnail","product_brand-autool","product_cat-automotive-diagnostic-multimeter","product_cat-automotive-repair-testing-equipment","product_tag-best-seller","product_tag-electrical-diagnostics","product_tag-measurement-tools","product_tag-multi-warehouse-shipping","product_tag-new-arrival","product_tag-voltage-options","first","instock","shipping-taxable","purchasable","product-type-variable"],"meta_box":{"autool_archive_segment":"Electrical diagnostics","autool_primary_use_case":"Remote key signal, infrared and button-battery testing","autool_customer_focus":["measurement accuracy","voltage compatibility","warehouse \/ delivery location"],"autool_source_summary":"- Electrical Faults Faster: Puts voltage, polarity, continuity, and signal-check tasks first so users can shorten troubleshooting time. - OBD Access Comes First: Made for OBD2 extension or adapter use where tool placemen","autool_model_family":"DM303","autool_voltage_options":"110V\u3001220V","autool_ship_from_options":"Germany\u3001United States\u3001United Kingdom\u3001China","autool_package_options":"","autool_accessory_options":"","autool_data_confidence":"site-content-derived","autool_manual_review_notes":""},"_links":{"self":[{"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product\/38337","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/comments?post=38337"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/media\/78997"}],"wp:attachment":[{"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/media?parent=38337"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product_brand?post=38337"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product_cat?post=38337"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product_tag?post=38337"},{"taxonomy":"hf_cat_product","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/hf_cat_product?post=38337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}