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Mk7 cutting out

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Mk7 cutting out

Postby DOL » Tue Jan 24, 2023 10:29 pm

Good evening I have a mk7 2.4 tdci rwd 140ps,its encountered a problem where whilst driving it cuts out like I've turned the ignition off, most of the time foot off throttle and back on and it carry on driving ( loud clicking from under seat when it happens) sometimes it cuts out and comes to a stop with engine Malfunction light on and just turns over, turn it off wait a few seconds and it starts, also does it whilst ticking over, I've changed ignition switch but it's not cured it any help/advise greatly appreciated
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Re: Mk7 cutting out

Postby tranmx2 » Tue Jan 24, 2023 11:41 pm

Better to get Forscan an adaptor ELM 327 USB FTDI from Tunnel rats.
See the codes.

Get clicks from under the seat on my van just after turning the starter key. 2 batteries.

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Re: Mk7 cutting out

Postby Altransit » Tue Jan 24, 2023 11:42 pm

Loud clicking from under the seat, sounds like the battery connector relay is playing up, but I don't know how or why that would cause the engine to cut out :?
Are the batteries both good, Dol :?:
1997 Mk5 SWB 115 Minibus 70ps Di (Gone, but not forgotten!)
2004 Mk6 SWB T280 Medium Roof 85PS 2.0 TDDi - Vantunered (Also gone)
2008 Mk7 SWB T280 Medium Roof 85PS 2.2 TDCi - Also Vantunered
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Re: Mk7 cutting out

Postby knobby1 » Wed Jan 25, 2023 12:19 am

Check or replace the ignition switch too, if it disconnects it will shut the battery connector relay off.

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When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: Mk7 cutting out

Postby DOL » Wed Jan 25, 2023 4:05 am

Yeah both batteries are good & replaced ignition switch, got the lad who rebuilt engine coming Fri to plug it in so we might know a bit more then
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Re: Mk7 cutting out

Postby Altransit » Wed Jan 25, 2023 1:08 pm

Keep us posted 8)
1997 Mk5 SWB 115 Minibus 70ps Di (Gone, but not forgotten!)
2004 Mk6 SWB T280 Medium Roof 85PS 2.0 TDDi - Vantunered (Also gone)
2008 Mk7 SWB T280 Medium Roof 85PS 2.2 TDCi - Also Vantunered
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Re: Mk7 cutting out

Postby DOL » Sun Jan 29, 2023 8:54 pm

Thought I somehow cured it but returning from a 30 mile round trip it cut out, it started after a couple of tries then got 300yds from home and it died with engine Malfunction light on, got it plugged in today and its not communicating to the bcm whatever that means
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Re: Mk7 cutting out

Postby knobby1 » Mon Jan 30, 2023 12:40 am

DOL wrote:Thought I somehow cured it but returning from a 30 mile round trip it cut out, it started after a couple of tries then got 300yds from home and it died with engine Malfunction light on, got it plugged in today and its not communicating to the bcm whatever that means


Not communicating with just the BCM..?? Or not communicating at all with anything.??

Lord Knobrot
2008 2.4L RWD 170+PS 6-speed 350 LWB High Roof.

When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: Mk7 cutting out

Postby DOL » Mon Jan 30, 2023 7:58 pm

He said just the Bcm but knowing my luck it's probably everything
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Re: Mk7 cutting out

Postby Altransit » Mon Jan 30, 2023 8:24 pm

Could it be a bad connection where the BCM plugs into the loom? Corroded or bent connector?
1997 Mk5 SWB 115 Minibus 70ps Di (Gone, but not forgotten!)
2004 Mk6 SWB T280 Medium Roof 85PS 2.0 TDDi - Vantunered (Also gone)
2008 Mk7 SWB T280 Medium Roof 85PS 2.2 TDCi - Also Vantunered
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Re: Mk7 cutting out

Postby knobby1 » Mon Jan 30, 2023 8:59 pm

DOL wrote:He said just the Bcm but knowing my luck it's probably everything


What Altransit said....if that proves ok, do your interior cab lights work..?? They share a fuse with the OBD-II port.

Lord Knobrot
2008 2.4L RWD 170+PS 6-speed 350 LWB High Roof.

When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: Mk7 cutting out

Postby DOL » Mon Jan 30, 2023 11:17 pm

Yes is the bcm behind the glove box?all cab lights work
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Re: Mk7 cutting out

Postby Altransit » Tue Jan 31, 2023 12:53 am

BCM is behind the passenger fuse box, which is behind the glove box

The fuse box unclips and pivots out of the way, to expose the BCM (which also has fuses on it)

Look here :arrow: viewtopic.php?f=40&t=49206
1997 Mk5 SWB 115 Minibus 70ps Di (Gone, but not forgotten!)
2004 Mk6 SWB T280 Medium Roof 85PS 2.0 TDDi - Vantunered (Also gone)
2008 Mk7 SWB T280 Medium Roof 85PS 2.2 TDCi - Also Vantunered
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Re: Mk7 cutting out

Postby DOL » Tue Jan 31, 2023 6:50 am

Thanks Altransit I thought it was there, I'll have look on sat when I'm home
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Re: Mk7 cutting out

Postby DOL » Tue Jan 31, 2023 11:51 pm

Had a rummage around tonight and found this burnt out wire traced it to front light, replaced it but still same, maybe this could be the problem maybe not, not sure what to do,
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