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Old 05-01-2019   #16
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Re: Any Dualogic Specialist in West Yorks

Hi.
Lots of sensor and can bus stuff. Right brake light too.

Wiring fault I duspect.. does the battery keep going flat?
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Old 06-01-2019   #17
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Re: Any Dualogic Specialist in West Yorks

Seems to me that the acceleretor pedal position is the best candidate.

Engine would start (doesn't realy need to know the pedal position) and then stop because of this missing info (doesn't know driver's desire), which is exactly what the OP says ...

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Last edited by Bernievarian; 06-01-2019 at 10:04.
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Old 06-01-2019   #18
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Re: Any Dualogic Specialist in West Yorks

Some basic things would be to check for water in the fuse box or corrosion on the plugs
Also may be worth replacing the main earth cables as these can cause all sorts of issues
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Old 06-01-2019   #19
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Re: Any Dualogic Specialist in West Yorks

Quote Originally Posted by varesecrazy View Post
Hi.
Lots of sensor and can bus stuff. Right brake light too.

Wiring fault I duspect.. does the battery keep going flat?
The battery is flat now most likely because it has been stood since November. But prior to that, the battery was fine and is brand new.

So today when I stuck the battery on, turned the key to do the requested tests and the engine started! It was juddery, but it was idling for about a minute or so before cutting out and returning to the same behaviour shown in the video earlier in this thread. I tried my best to replicate it, but couldn't get the same result.

Quote Originally Posted by irc View Post
OK, a couple more questions:
With Ignition on but engine off, if you move lever to "R" can you hear the gear being selected?
(If you do, move changer to first, then back to reverse a couple of times. You should hear gears being selected, and after a few shifts the pump should run again)
With the lever in normal Drive position, if you try to start without your foot on the brake, what message do you get?
(Should be "Press brake and retry" or similar. If so, press brake and retry. Did it start, or just do the same as in the video?)

My suspicion (only a guess) is that you have water in your fuse box, or an earth lead problem, but it would be good to rule out as much as easily possible first, and the gearbox inhibit functions are a good place to start. However the video doesn't show strange dashboard behaviour, which I would normally expect with wet fuse box or dodgy earth lead...
It finds gears, the pump primes, I get the "Press Brake And Retry" and then get the same result as previous. Quick vid of the gears being selected...



Speaking of strange dashboard behaviour, the dash is occasionally coming up with what looks like faint Russian and showing the mileage in KM. I'll attach a pic to show what I mean. A quick turn of the key though and it goes back to normal. Sometimes the transmission light flashes on and off repeatedly, but sometimes it doesn't.

I have had the fuses under the bonnet checked with a multimeter, as well as the gubbins attached to the positive terminal that sits on top of the battery. They are all fine according to the RAC guy. How would I do further checks on them and the fuse box itself to see if there is any water damage or other faults?

As mad as it sounds, I am going to pull the brake lights off and check for corrosion or any fault there. I'm not sure if it is a pointless effort but anything is worth a try I suppose.
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Last edited by Optikal; 06-01-2019 at 18:16.
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Old 06-01-2019   #20
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Re: Any Dualogic Specialist in West Yorks

OK. Another good step forward. The strange dash behaviour, print of codes from an RAC reader, and the one-off start-up do point to one of the following, so let's have a look at them:

1. Earth Leads
Have a look in the Grande Punto section FAQs. There's a guide by Andy Monty about earths and fuse box problems.

2. Fuse Box
See (1)

3. A wiring fault.
Possibly a corroded/loose connector, break in a wire, etc. Could really do with some precise information to narrow it down. You could strike lucky by checking the known villains (rear light connectors, ECU connectors, ECU earth wire, BCU earth wire, and others)

4. Battery or Alternator
I know you've used a different battery, but it is (just) possible that neither your battery or the loan one are giving a stable voltage.
Similarly, I have seen a couple of cases where an alternator seems to be perfectly OK until it gets stressed a bit more than usual. Then it does all kinds of weird things, including flat battery, random electrical problems, etc.

The good news is that it sounds like your gearbox is working fine, and that the troubles you are having are "normal car" rather than "strange gearbox that nobody will touch" ones.

Any moderately competent auto electrician (or even a good local garage) should be able to sort it from here.

Unfortunately, I don't think a generic reader (as nearly always used by this type of place) gives a good enough idea of what's really going on, except for really simple problems.
Where are you based?
A local forum member with MultiECUScan could capture the existing (FIAT-specific) codes, clear them, and read any newly-generated codes from a couple of start-up attempts. That would give any auto-electrician or local garage a flying start on fixing it.

PS: I'm not criticising the RAC (or AA etc.) info, but I have helped a few people in the past who have been chasing errors from "the breakdown guy" which have not pointed to the real problem, and I'm wary of taking them at face value. The codes read are real codes, but the code descriptions vary in quality/accuracy.
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Old 06-01-2019   #21
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Re: Any Dualogic Specialist in West Yorks

Thank you so much for your in depth replies and analysis mate, you're giving me a good deal of confidence that this can be worth fixing. I agree that hooking it up to MES would be a good leap forward. Any ideas on how I would find a local user on here?
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