{"id":4093,"date":"2017-08-31T13:01:31","date_gmt":"2017-08-31T11:01:31","guid":{"rendered":"http:\/\/www.checkstar-techblog.it\/fiat-panda-1-3-mjet-2008-non-si-avvia-per-guasto-motorino-avviamento\/"},"modified":"2024-01-12T15:30:31","modified_gmt":"2024-01-12T14:30:31","slug":"fiat-panda-1-3-mjet-2008-doesnt-start-failure-engine","status":"publish","type":"post","link":"https:\/\/www.checkstar-techblog.it\/en\/fiat-panda-1-3-mjet-2008-doesnt-start-failure-engine\/","title":{"rendered":"Fiat Panda 1.3 mjet 2008 does not start due to starter motor fault"},"content":{"rendered":"

Today I write about a problem we solved on Fiat Panda 1300 mjet 2008 4\u00d74<\/strong>\"\"<\/p>\n

Here is the description of the problem described by my Check Star Magneti Marelli workshop colleague:<\/p>\n

The car arrives at the workshop and the owner complains that the engine does not start<\/strong>.<\/p>\n

 <\/p>\n

The problem, however, is occasional<\/strong> and occurs irregularly, i.e. without warning.<\/p>\n

My colleague reports this: when the Panda does not start, I find that the revs signal in the diagnosis is alternating, the tachometer needle also jerks.<\/p>\n

This also happens to the diesel pressure, which pulses and therefore does not reach the threshold for the injectors to open. Also, when it doesn't start, I can hear the glow plug relay going on and off.<\/p>\n

I checked the cables going from the rpm sensor to the control unit and they seem OK (today I will try to replace them)<\/p>\n

I replaced the rpm sensor<\/p>\n

I replaced the phase sensor<\/p>\n

I replaced the diesel pressure regulator<\/p>\n

I disconnected the glow plugs<\/p>\n

I checked the flywheel<\/p>\n

checked injector recovery<\/p>\n

checked the low pressure<\/p>\n

replaced motor management relay<\/p>\n

checked the power supplies in the control unit<\/p>\n

checked the starter switch<\/p>\n

PLEASE NOTE<\/p>\n

when the car does not start, if you try to start it with a push, it starts immediately.<\/p>\n

Diagnosing with the oscilloscope, I checked the signal at the diesel pressure regulator, and I see that the signal varies from a square wave to an abnormal signal.<\/p>\n

I measured that rpm and the wave fades at times. I changed the wiring from the rpm sensor to the ECU, and also tried another ECU.<\/p>\n

At the end of the checks, we discovered that the problem was caused by the starter motor, which had an absorption fault.<\/strong><\/p>\n

We changed the motor and the problem was solved<\/strong>.<\/p>\n

See you at the next solved case<\/p>\n

Best regards Antonio<\/p>","protected":false},"excerpt":{"rendered":"

I am writing today about a problem that we have solved on a 2008 Fiat Panda 1300 mjet 4\u00d74 Here is the [...]<\/p>","protected":false},"author":44,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[145],"acf":[],"featured_image_urls":{},"appp_media":null,"views":2009,"_links":{"self":[{"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/posts\/4093"}],"collection":[{"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/users\/44"}],"replies":[{"embeddable":true,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/comments?post=4093"}],"version-history":[{"count":0,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/posts\/4093\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/media?parent=4093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/categories?post=4093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.checkstar-techblog.it\/en\/wp-json\/wp\/v2\/tags?post=4093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}