{"id":17174,"date":"2023-01-18T13:53:16","date_gmt":"2023-01-18T18:53:16","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=17174"},"modified":"2023-01-18T13:53:55","modified_gmt":"2023-01-18T18:53:55","slug":"maintaining-power-to-a-module-sent-in-for-warranty-analysis","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=17174","title":{"rendered":"Maintaining Power to a Module Sent in for Warranty Analysis"},"content":{"rendered":"

In order to help GM Engineering identify the root cause and troubleshoot some component drains or logic lockups on 2000-2023 GM passenger cars and trucks, it\u2019s critical that power to the module be maintained during shipping; otherwise, the component may reset and clues to the cause of the condition will be lost.<\/p>\n

To maintain power to the module, a small battery should be connected before it is sent to GM Engineering for analysis. Be sure to work with GM TAC, TCSC, your Field Service Engineer or other contacts to identify the best course of action with the part.<\/p>\n

Bulletin #22-NA-205 was released recently with information about properly harvesting a module for warranty analysis. The photos in the document show an example of harvesting a Front Camera Module (FCM) from a 2022 GMC Sierra due to a parasitic drain.<\/p>\n

Power Supply<\/strong><\/p>\n

A stable power connection to the component can be accomplished using a small 12V battery that is safe for shipping. In some cases, a larger battery may be required if a module has a high drain condition. A battery connector cable with F1 terminals also will be needed. The size of the wire and fuse will be dependent on the current draw.<\/p>\n

Use Service Information schematics connector end views to find the component\u2019s pinout to identify the (-) Ground and (+) 12V power supply terminals. (Fig. 1) If there is more than one, confirm with GM Engineering if one or all pins are required to be connected.<\/p>\n

 <\/p>\n

\"\"Fig. 1<\/strong><\/p>\n

 <\/p>\n

Connecting Power<\/strong><\/p>\n

Next, after determining the best way to splice in the auxiliary power supply, expose the wiring, connect power and secure the connection. Verify the drain is still present before securing the connection. (Fig. 2)<\/p>\n

 <\/p>\n

\"\"Fig. 2<\/strong><\/p>\n

 <\/p>\n

Once the ground and 12V wires to the battery are connected, cut the wires on the connector one at a time to remove the battery and component out of the vehicle. (Fig. 3)<\/p>\n

 <\/p>\n

\"\"Fig. 3<\/strong><\/p>\n

 <\/p>\n

Again, if the module harvesting concerns a parasitic drain, verify that the drain is still present using a current clamp once it has been removed from the vehicle. (Fig. 4)<\/p>\n

 <\/p>\n

\"\"Fig. 4<\/strong><\/p>\n

 <\/p>\n

Install a new connector on the vehicle harness and verify no DTCs are set.<\/p>\n

Packaging and Shipping<\/strong><\/p>\n

When returning the component in the failed state, firmly secure the battery and component in the shipping container to ensure the electrical connection stays secure. Also properly seal and package the component in the shipping container and label the package: UN2800 \u2013 Batteries, Wet, Non-spillable.<\/p>\n

For complete details for powering the module and shipping all components, refer to Bulletin #22-NA-205.<\/p>\n

– Thanks to Marco Salcedo<\/em><\/p>\n

\n","protected":false},"excerpt":{"rendered":"

In order to help GM Engineering identify the root cause and troubleshoot some component drains or logic lockups on 2000-2023 GM passenger cars and trucks, it\u2019s critical that power to […]<\/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":[135],"tags":[],"class_list":["post-17174","post","type-post","status-publish","format-standard","hentry","category-2023-january-a"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/17174","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=17174"}],"version-history":[{"count":2,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/17174\/revisions"}],"predecessor-version":[{"id":17176,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/17174\/revisions\/17176"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17174"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17174"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}