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No communications ecm/pcm

unimatrix1
unimatrix1
in Ford S-Max Club

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Smax 2.0 tdci 6 speed manual 2008

Car cranks but no start engine malfunction light on and immobiliser active, I've checked all fuses and they're fine.

Checked spare key incase of chip but thus didn't make any difference.

Checked all connectors going to the board under the glove box to make sure none was loose.

Any advice and suggestions on this one?

Could it possibly be a bad earth through the wiring somewhere and does anyone know what wire is the earth's I should be checking?

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    • 10 months later...


    I had a similar problem when car would not crank it was saying immo active even tho I had correct keys got for scan tried relearning the keys no avail in the end took it to a auto electrician turns out broken wire going to abs module got it fixed costing £280 a week before Christmas 

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    • The Digestive Forum Roundup (24th May - 31st May 2026)

      Steve ·
      The Digestive Forum Roundup (24th May - 31st May 2026) We hope this email finds you well and enjoying your week. As always, our forum has been buzzing with activity, so we’ve compiled the highlights for you. Plenty of interesting discussions are taking place, especially around the Ford Focus and Fiesta models. Starting off with the Focus, many members have been discussing issues with the Emergency Call System, particularly in the Mk4 model. PLB raised concerns about persistent malfunctions, a se
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