JDM Performance Posted October 22, 2007 Share Posted October 22, 2007 Apologies if this is in the wrong section but i didnt know where else to put it. Been getting random Engine Light coming on and have checked it to be error code P1065 which on the diagnostic machine says "Main Relay Malfunction". A quick search on the web shows a lot of posts mentioning "ECM Power Supply Heater". I cant seem to find anything to actually describe what this means, nor how to resolve it, short of 'deleting the error and see how it goes'. Any help please? Cheers Chris Quote Link to comment Share on other sites More sharing options...
Ian Posted October 22, 2007 Share Posted October 22, 2007 Probably best to ask over at 350z-tech.com or my350z.com From a quick google search though P1065 ECM power supply circuitECM back up RAM system does not function properly. ECM power supply (back-up) circuit is open or shorted. Causes: Harness or connectors ECM failure Make sure the connectors are clean and tight. Try clearing it & see if/how soon it returns Also http://x.infinitihelp.com/forum/showthread.php/service-engine-soon-code-p1065-help-624.html?p=4097 Quote Link to comment Share on other sites More sharing options...
Tere Posted October 23, 2007 Share Posted October 23, 2007 Red/White wire coming from the battery -- total of 4 connectors to check. It connects to the ECM on terminal 121. Quote Link to comment Share on other sites More sharing options...
H5 Posted October 23, 2007 Share Posted October 23, 2007 Red/White wire coming from the battery -- total of 4 connectors to check. It connects to the ECM on terminal 121. Yeah, that's what I would've said. Quote Link to comment Share on other sites More sharing options...
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