{"id":11816,"date":"2025-09-16T08:40:29","date_gmt":"2025-09-16T08:40:29","guid":{"rendered":"https:\/\/fqsbattery.com\/coche-no-arranca\/"},"modified":"2026-03-03T11:15:15","modified_gmt":"2026-03-03T11:15:15","slug":"coche-no-arranca","status":"publish","type":"post","link":"https:\/\/fqsbattery.com\/en\/coche-no-arranca\/","title":{"rendered":"The car won&#8217;t start, and the battery has just been replaced."},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"11816\" class=\"elementor elementor-11816 elementor-9221\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c3d6072 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c3d6072\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-107dc57\" data-id=\"107dc57\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c1fe944 elementor-widget elementor-widget-wp-widget-text\" data-id=\"c1fe944\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"textwidget\"><p style=\"text-align: justify\">Frequently, a common scenario recurs in workshops: the customer arrives convinced that their battery is not the problem because it has been recently checked or replaced.<\/p>\n<p style=\"text-align: justify\">However, the vehicle won&#8217;t start. The explanation is that the <strong>starting and ignition circuit is a multifactorial system<\/strong>, where the battery is only the first link. <\/p>\n<p>At <strong>FQS BATTERY<\/strong>, we tell you what can happen and which systems should be checked.<\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-825ff15 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"825ff15\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-adb984c\" data-id=\"adb984c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-18dbdc3 elementor-widget elementor-widget-wp-widget-text\" data-id=\"18dbdc3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5>1 &#8211; Starter Motor and Solenoid<\/h5>\t\t\t<div class=\"textwidget\"><p>The <em>starter<\/em> may exhibit:<\/p>\n<ul>\n<li><strong>Wear in the commutator or brushes<\/strong> \u2192 voltage drop and low cranking torque.<\/li>\n<li><strong>Defective solenoid<\/strong> \u2192 the pinion does not engage with the flywheel ring gear.<\/li>\n<li><strong>Seized bearings<\/strong> \u2192 excessive amperage consumption that the battery cannot sustain even if charged.<\/li>\n<\/ul>\n<p>Recommended test: measurement of voltage drops in positive and negative during the cranking maneuver.<\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c84762e elementor-widget elementor-widget-image\" data-id=\"c84762e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"700\" height=\"219\" src=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/SOLENOIDE-DE-ARRANQUE.webp\" class=\"attachment-large size-large wp-image-11819\" alt=\"Starter solenoid\" srcset=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/SOLENOIDE-DE-ARRANQUE.webp 700w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/SOLENOIDE-DE-ARRANQUE-360x113.webp 360w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/SOLENOIDE-DE-ARRANQUE-18x6.webp 18w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">STARTER SOLENOID<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d4e95fd elementor-widget elementor-widget-wp-widget-text\" data-id=\"d4e95fd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5>2 &#8211; Relays and Fuses in the Starting Circuit<\/h5>\t\t\t<div class=\"textwidget\"><p style=\"text-align: justify\">A starter relay with burned or stuck contacts prevents current flow. Similarly, a tripped main fuse (usually 30\u201360 A in the starting line) blocks the system. <\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6190203 elementor-widget elementor-widget-wp-widget-text\" data-id=\"6190203\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5>3 &#8211; Ignition Switch and Start-Stop Systems<\/h5>\t\t\t<div class=\"textwidget\"><p style=\"text-align: justify\">The ignition barrel or electrical switch fails due to mechanical wear or loss of internal continuity. In vehicles with a Start\/Stop button, the Body Control Module (<a href=\"https:\/\/en.wikipedia.org\/wiki\/BCM\" target=\"_blank\" rel=\"noopener\">BCM<\/a>) may not send the activation signal to the starter relay. <\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-f2a0da1 e-flex e-con-boxed e-con e-parent\" data-id=\"f2a0da1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0f02bb2 elementor-widget elementor-widget-image\" data-id=\"0f02bb2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"\/?vehicle_type=vehiculo_industrial\" target=\"_blank\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"700\" height=\"219\" src=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/ARRANQUE-START-STOP.webp\" class=\"attachment-large size-large wp-image-11818\" alt=\"Car start\/stop button\" srcset=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/ARRANQUE-START-STOP.webp 700w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/ARRANQUE-START-STOP-360x113.webp 360w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/ARRANQUE-START-STOP-18x6.webp 18w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"><\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c32e43e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c32e43e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5a38ae7\" data-id=\"5a38ae7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a817a6b elementor-widget elementor-widget-wp-widget-text\" data-id=\"a817a6b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5>4 &#8211; Immobilizer and Coded Keys<\/h5>\t\t\t<div class=\"textwidget\"><p style=\"text-align: justify\">The anti-theft system is critical: the absence of transponder key recognition blocks injection and ignition. The starter motor may turn, but the <strong>ECU<\/strong> (Engine Control Unit) does not enable spark or injection. <\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c6daa74 elementor-widget elementor-widget-wp-widget-text\" data-id=\"c6daa74\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5>5 &#8211; Fuel Supply System<\/h5>\t\t\t<div class=\"textwidget\"><ul>\n<li style=\"text-align: justify\"><strong>Inoperative electric pump<\/strong> (winding, relay, or fuse failure).<\/li>\n<li style=\"text-align: justify\"><strong>Clogged fuel filter<\/strong>.<\/li>\n<li style=\"text-align: justify\"><strong>Defective pressure regulator<\/strong>.<\/li>\n<\/ul>\n<p style=\"text-align: justify\">Diagnostic test: measurement of injection rail pressure.<\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d40fe7 elementor-widget elementor-widget-wp-widget-text\" data-id=\"8d40fe7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5>6 &#8211; Synchronization Sensors (CKP\/CMP)<\/h5>\t\t\t<div class=\"textwidget\"><p style=\"text-align: justify\">The crankshaft position sensor (CKP) or camshaft position sensor (CMP) are essential. A non-existent or inconsistent signal prevents synchronization. The engine turns, but there is no injection or spark.  <\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2064994 elementor-widget elementor-widget-image\" data-id=\"2064994\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"700\" height=\"219\" src=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/SENSORES.webp\" class=\"attachment-large size-large wp-image-11817\" alt=\"car sensors\" srcset=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/SENSORES.webp 700w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/SENSORES-360x113.webp 360w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/SENSORES-18x6.webp 18w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">CKP AND CMP SENSORS<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1b6f4b4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1b6f4b4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5e74d79\" data-id=\"5e74d79\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8155c5c elementor-widget elementor-widget-wp-widget-text\" data-id=\"8155c5c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5>7 &#8211; Alternator and False Impressions of a Charged Battery<\/h5>\t\t\t<div class=\"textwidget\"><p style=\"text-align: justify\">A battery may show <strong>12.5 V at rest<\/strong> and yet not withstand the 200\u2013400 A demand of starting. This occurs when the alternator has not been charging for a long time, and the battery only retains a superficial voltage (<em>surface charge<\/em>). A load test is essential.  <\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e8ca811 elementor-widget elementor-widget-wp-widget-text\" data-id=\"e8ca811\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5>8 &#8211; Connections, Grounds, and Sulfation<\/h5>\t\t\t<div class=\"textwidget\"><ul>\n<li style=\"text-align: justify\">Parasitic resistances in ground cables.<\/li>\n<li style=\"text-align: justify\">Terminals with sulfate or insufficient tightening.<\/li>\n<li style=\"text-align: justify\">Main cables with corroded internal wires.<\/li>\n<\/ul>\n<p style=\"text-align: justify\">These defects increase internal resistance and reduce the available current during starting.<\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7dbc8cf elementor-widget elementor-widget-wp-widget-text\" data-id=\"7dbc8cf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wp-widget-text.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5>Conclusion<\/h5>\t\t\t<div class=\"textwidget\"><p style=\"text-align: justify\">A starting failure with a good battery requires checking the <strong>entire system<\/strong>:<\/p>\n<ul>\n<li style=\"text-align: justify\">Starter motor<\/li>\n<li style=\"text-align: justify\">Control circuit (relays, fuses, switch)<\/li>\n<li style=\"text-align: justify\">Immobilizer<\/li>\n<li style=\"text-align: justify\">Injection<\/li>\n<li style=\"text-align: justify\">Synchronization sensors and ground quality.<\/li>\n<\/ul>\n<p style=\"text-align: justify\">Proper diagnosis requires measuring voltage drops, starting currents, and reference signals with an oscilloscope.<\/p>\n<p style=\"text-align: justify\">Ultimately, <strong>the battery is not always to blame<\/strong>: the real challenge lies in identifying which link in the chain interrupts the starting sequence.<\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-223f174 elementor-widget elementor-widget-image\" data-id=\"223f174\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"917\" height=\"280\" src=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/fqs-jis-fqs-battery.webp\" class=\"attachment-large size-large wp-image-11821\" alt=\"FQS Battery brand JIS batteries\" srcset=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/fqs-jis-fqs-battery.webp 917w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/fqs-jis-fqs-battery-360x110.webp 360w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/fqs-jis-fqs-battery-750x229.webp 750w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/09\/fqs-jis-fqs-battery-18x5.webp 18w\" sizes=\"(max-width: 917px) 100vw, 917px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-bb17fd3 e-flex e-con-boxed e-con e-parent\" data-id=\"bb17fd3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-de3b6ad elementor-widget elementor-widget-image\" data-id=\"de3b6ad\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/fqsbattery.com\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"144\" src=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/02\/logo-noticia.jpg\" class=\"attachment-large size-large wp-image-10473\" alt=\"\" srcset=\"https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/02\/logo-noticia.jpg 600w, https:\/\/fqsbattery.com\/wp-content\/uploads\/2025\/02\/logo-noticia-360x86.jpg 360w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Frequently, a common scenario recurs in workshops: the customer arrives convinced that their battery is not the problem because it has been recently checked or replaced. At FQS BATTERY, we explain what the issue might be. <\/p>\n","protected":false},"author":3,"featured_media":11820,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[341,304,277],"tags":[518,519],"class_list":["post-11816","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-maintenance","category-technology","category-trends","tag-battery","tag-starting"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The car won&#039;t start, and the battery has just been replaced. - FQS BATTERY<\/title>\n<meta name=\"description\" content=\"When a customer arrives convinced that their battery is not the problem, but the car won&#039;t start. 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