vauxhall frontera non start yd22dth

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vauxhall frontera non start yd22dth

Postby hailoffame » Thu Oct 20, 2016 1:21 pm

This will not start, but cranks fast enough.
No ecu comms,although some underbonnet sensors are getting 5v feeds.
The glow plug light and management light dont come on with ignition and the glow plugs are not operating.
Thanks
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Re: vauxhall frontera non start yd22dth

Postby STC » Thu Oct 20, 2016 2:42 pm

No ecu comms,


Too little info in your post to have any clue where to start helping you.

If you have No Comms with ECM then fix that first !!! Basics !!! Wiring Diagram > Powers & Grounds > Communication Lines > ????
No EML & Glow Light all point to ECM not coming to the party.
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Re: vauxhall frontera non start yd22dth

Postby hailoffame » Thu Oct 20, 2016 7:05 pm

Thanks for the reply, I'm sorry if the post was too short as I dont post very often.
Its 2.2 dti from 2003. I have not yet accessed the ECM its way up behind the dash!
Why not like lots of other cars easily removed?
The only history is recent purchase, had battery changed, not by me.
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Re: vauxhall frontera non start yd22dth

Postby Dcunning35 » Thu Oct 20, 2016 9:07 pm

Check basics before digging it out do you have power at dlc etc could we have a blown ecm memory fuse?
Danny
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Re: vauxhall frontera non start yd22dth

Postby hailoffame » Thu Oct 20, 2016 10:28 pm

Thanks for the reply, I get the scanner lighting up and then not communicating sometimes with a message for mis match so I presume power is good.
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Re: vauxhall frontera non start yd22dth

Postby STC » Thu Oct 20, 2016 10:51 pm

so I presume power is good.


If that can be taken as true, the car will start on the turn of the key ? - I presume ?

What Scanner ???

Do you have a wiring diagram for ECM or not ?
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Re: vauxhall frontera non start yd22dth

Postby hailoffame » Thu Oct 20, 2016 11:00 pm

Yes, It shows all pin data, just working out why it seems no glow plugs or injection and yet afm ,tps and cts are live?
I'm still thinking engine ecu fault.
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Re: vauxhall frontera non start yd22dth

Postby hailoffame » Thu Oct 20, 2016 11:46 pm

Sorry missed scanner, Sykes acr with G2 suite and generic launch obd 2 . no flashing lights when cranking.
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Re: vauxhall frontera non start yd22dth

Postby STC » Thu Oct 20, 2016 11:50 pm

I'm still thinking engine ecu fault.


Replace it - Conclusive ?? But not wise !!!
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Re: vauxhall frontera non start yd22dth

Postby FioranoCars » Fri Oct 21, 2016 2:09 pm

STC wrote:Replace it - Conclusive ?? But not wise !!!


I agree, with the not wise bit!

You need to know what key on dash lights should be lit by Engine ECU and what power you have at the ECU (and grounds), yes volt drop between ECU Ground pin and chassis when cranking, ditto for live to battery terminal. That's a 4 channel test you can do in 5minutes, and proved each live and ground is good.

Comms with ECU might be an issue due to other fuses. OBD port is NEVER supplied power from Engine ECU, it has own fuse (or shared with cigar lighter etc. Check ODB earth (Pin 4 and 5) and live (pin 16 - sometimes others too). If Diag tool not lighting up it's the OBD port issue not engine ECU!!

Start with the basics before you condem an ECU, worse you might plug a new ECU and blow that one if you've done no basic tests. Before replacing the ECU i'd first inspect the harness connector and clean all the pins, check for loose pins, stray strands etc etc

Let us know how you get on

Richard
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