{"id":12808,"date":"2020-03-19T14:10:47","date_gmt":"2020-03-19T18:10:47","guid":{"rendered":"https:\/\/techlink.mynetworkcontent.com\/?p=12808"},"modified":"2020-03-20T17:38:12","modified_gmt":"2020-03-20T21:38:12","slug":"servicing-check-engine-light-conditions-on-2020-models","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=12808","title":{"rendered":"Servicing Check Engine Light Conditions on 2020 Models"},"content":{"rendered":"<p class=\"western\"><span style=\"font-size: 12pt;\">GM requires that technicians document the causal Diagnostic Trouble Code (DTC) that leads them to a vehicle warranty repair. The DTC is to be documented in the \u201cCause Comments\u201d section of the repair order (job card), along with any other diagnostic results. The cause comments from the technician are uploaded with the warranty transaction to GM and help quality engineers understand what repairs are being performed to vehicles and why.<\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">For the 2020 model year, documenting the correct causal DTC and clearly identifying it on the repair order is increasingly important as the DTC will help a dealership\u2019s service team identify proper warranty coverage on the following models:<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 12pt;\">2020 Chevrolet Corvette<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">2020 Cadillac CT4<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">2020 Cadillac CT5<\/span><\/li>\n<\/ul>\n<p class=\"western\"><span style=\"font-size: 12pt;\">The new Corvette, CT4 and CT5 operate on GM\u2019s Next Generation Digital Vehicle Platform. With the new architecture, there are several vehicle components that are referred to as mixed-use parts, which means they control both emissions-related (Fig. 19) and non-emissions-related features on the vehicle. Therefore, depending on the malfunction of that part, warranty coverage may be emissions warranty related, or it may not. <\/span><\/p>\n<p class=\"western\" style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12801\" src=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/03\/F19-check-engine-MIL.jpg\" alt=\"\" width=\"740\" height=\"480\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/03\/F19-check-engine-MIL.jpg 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/03\/F19-check-engine-MIL-300x195.jpg 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/03\/F19-check-engine-MIL-85x55.jpg 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/03\/F19-check-engine-MIL-200x130.jpg 200w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><span style=\"font-size: 12pt;\"><b>Fig. 19<\/b><\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\"><b>Mixed-Use Components on 2020 Corvette, CT4, CT5<\/b><\/span><\/p>\n<ul>\n<li><span style=\"font-size: 12pt;\">Body Control Module<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">Blower Motor<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">Heating and Air Conditioning User Interface Control<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">Transmission Control<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">Ride Control Switch<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">Battery Monitor Module \/ Intelligent Battery Sensor<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">Vehicle Stability Control System Switch<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">Evaporator Air Temperature Sensor<\/span><\/li>\n<li><span style=\"font-size: 12pt;\">Programmable Temperature Value Actuator<\/span><\/li>\n<\/ul>\n<p class=\"western\"><span style=\"font-size: 12pt;\"><b>Validating and Diagnosing a Check Engine Light<\/b><\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\"><b>No Check Engine Light<\/b> \u2014 If there is NOT a check engine light illuminated when the vehicle pulls into the service department, there is no need to do anything differently to help your service team identify warranty coverage. If one of these components is affecting vehicle emissions, it will illuminate the check engine light. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\"><b>Check Engine Light On<\/b> \u2014 Perform a normal DTC scan. When viewing the DTC Display screen, a new yellow Malfunction Indicator Light (MIL) symbol may be seen next to select DTCs. (Fig. 20)<\/span><\/p>\n<p class=\"western\" style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12767\" src=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/03\/F20-check-engine-DTC-info.png\" alt=\"\" width=\"740\" height=\"480\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/03\/F20-check-engine-DTC-info.png 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/03\/F20-check-engine-DTC-info-300x195.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/03\/F20-check-engine-DTC-info-85x55.png 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/03\/F20-check-engine-DTC-info-200x130.png 200w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><span style=\"font-size: 12pt;\"><b>Fig. 20<\/b><\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">After running the DTC scan, follow the diagnostic steps listed in the appropriate Service Information to determine the causal DTC, and document it on the repair order as you normally would. <\/span><\/p>\n<p>&nbsp;<\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\"><b>New Requirement for 2020 Model Year<\/b><\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">If the causal DTC was emissions related, identified by the MIL symbol next to the code, document it as part of the repair by printing out the Vehicle DTC Display screen and attaching it to the repair order as an easy method of verification. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">Knowing the causal DTC, along with if the MIL indicator appeared next to it in GDS, will help warranty administrators to properly submit the warranty claim. For future claims beyond the Bumper-to-Bumper Warranty (or Canada\u2019s Base Warranty), the causal DTC will also be critical in determining warranty coverage on the repair. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\"><i>&#8211; Thanks to Patti Marino<\/i><\/span><\/p>\n<p class=\"western\">\n","protected":false},"excerpt":{"rendered":"<p>GM requires that technicians document the causal Diagnostic Trouble Code (DTC) that leads them to a vehicle warranty repair. The DTC is to be documented in the \u201cCause Comments\u201d section [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-12808","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/12808","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12808"}],"version-history":[{"count":3,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/12808\/revisions"}],"predecessor-version":[{"id":12822,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/12808\/revisions\/12822"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12808"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}