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Old 2 Weeks Ago   #1
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The engine turns over but no start

This is a weird one, This is a 2007 GrandPunto Duralogic, the doors lock and unlock with the key, when I put the key in and try to start the car nothing happens, if I turn it off and try again, the engine then cranks for about 5 seconds but will not start.

codes
U 1705-87 Receiver Radio (NRR)
B1001-13 Key transponder
U0426-68 Electronic key


I am thinking this could a can Bus issue.

I have multiscan and I would like to know if there is a pid to see if the module is reading the key, I am not sure what module looks for the transponder and then sends the message to the ecu to allow it to start.

Any help please


Paul
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Old 2 Weeks Ago   #2
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Re: The engine turns over but no start

Hi Paul.

So..what is the Immob. signal on the dash doing?

Flashes on.. then off

Not lighting

Not going off


I dont think is purely Immob though..
As it shouldnt act.up with cranking


Battery ..is it A1 ?

Earth cable checked ??

Charlie
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Old 2 Weeks Ago   #3
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Re: The engine turns over but no start

Hi Charlie, Thanks for taking the time, I am not sure about the light, I will have a look this morning.

Battery is good and the earth checked. If i get time I will check to make sure the can bus system is working, I would think it is as there would be more no communication codes,

It is strange that the key on the first turn to try to crank does nothing and turn of and try again it cranks for about 5 seconds every time as if the ecu is waiting for a signal


I will be back later


Paul
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Old 2 Weeks Ago   #4
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Re: The engine turns over but no start

Hi Charlie,

Ignition on immobiliser light (car /Padlock) is on.

turn the key to crank, no crank and the mobiliser light stays on.

But if I put the key in quick and I turn the key fast before the immobiliser light comes on it cranks for a few seconds until the immobiliser light comes and then it stops cranking, it never tries to start so probably no spark or injectors I would think.

If I push the key in and out fast and try to crank it does crank a bit longer, But the is probably delaying the key signal.

I also put another battery on and an extra earth from the battery negative to the engine block and the ECU.

I am sure it has something to do with the key.


Look forward to your comments


Paul
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Old 2 Weeks Ago   #5
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Re: The engine turns over but no start

Hi

It sounds like it is indeed immmobilised

What if you just put the key to MAR.. and let it do the self.test

Does fuel pump..under back seat.. whirr for 5 to 10 seconds?

Guessing you only have 1 chipped key to test?
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Old 2 Weeks Ago   #6
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Re: The engine turns over but no start

Hi , Not sure about the fuel pump, And yes just one key, I think I will get someone I know in the car key game to some and have a look at it for me, I will let you know how I get on.


Paul
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Old 2 Weeks Ago   #7
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Re: The engine turns over but no start

Grande do not need a CODE.. its stored in the ECU

SO coding a chip should be @30 5 minute job
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Old 2 Weeks Ago   #8
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Re: The engine turns over but no start

Hi!
I don't think it's a immobiliser problem, remember that the dualogic controller won't let you start the motor if it thinks certain conditions are not met. (No hydraulic pressure, clutch not released, gearbox not in neutral, brake pedal not pressed.)
It could have a very bad outcome.
BRs. Kjeld
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Old 2 Weeks Ago   #9
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Re: The engine turns over but no start

Hi I have done a lot of work on the duralogic systems, I have checked all perimeters and they all look fine and no fault codes, a new clutch and arm as this is where the problem started but it always would start.
So i am sticking with the key for now.

Thanks


Paul
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Old 1 Week Ago   #10
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Re: The engine turns over but no start

I have had the Key checked now, That was fine, I have can signals on pin 6 and 14, so the can system is not down, Not sure where to go now.


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Old 1 Week Ago   #11
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Re: The engine turns over but no start

Did you check the immobilizer parameters on both ECU and body computer? AFAIK on some fiats it's the body computer that reads your key and sends the code to the ECU via CAN. So be sure to check the parameters on body computer if you haven't already.

Did the immobilizer light went out after getting the key checked? Maybe the code is correct but the ignition switch is the problem and can't read the code from the key.
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Old 1 Week Ago   #12
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Re: The engine turns over but no start

Paullap - you said that issue begins after you replaced clutch and arm? If yes, then it looks that you:
1, forgot to plug some connector
2, accidentaly damaged some wiring during clutch replacement process
And maybe thats why you received those error codes...
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Old 1 Week Ago   #13
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Quote Originally Posted by paullap View Post
I have had the Key checked now, That was fine, I have can signals on pin 6 and 14, so the can system is not down, Not sure where to go now.


Paul
So what does the immob. Light do now?
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Old 1 Week Ago   #14
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Re: The engine turns over but no start

Hi Damage wiring is a good shout, I need to spend some more time investigating.


Paul
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Old 1 Week Ago   #15
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Re: The engine turns over but no start

Please double check main ECU connectors, but also whole cabling which is going to interior through firewall. Maybe during clutch replacement this cabling was pulled to engine bay and that caused wrong connection under steering wheel or somewhere...hard to say...I dont expect that some sensor isnt plugged because it will cause error code about it. This is related to ECU connection between ignition module, its IMO. Bit of course it can be also faulty IMO or circuit inside key...but check cabling is cost free ;-)
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