General Engine Cranking,rev counter not moving, just can get it to run

[timmycm850]

P0654 is likely the error code for wiring issue on the rpm sensor. So check pins on the wiring loom etc. Does the rev counter move when you crank it over

 

[jackwhoo]

The code is p0657

 

[cookie73]

The code is p0657

Apologies, yes p0657

 

[cookie73]

P0654 is likely the error code for wiring issue on the rpm sensor. So check pins on the wiring loom etc. Does the rev counter move when you crank it over

Its not even cranking now. Sounds like a machine gun.

 

[jackwhoo]

The battery is flat

 

[cookie73]

The battery is flat

The battery is flat

Fully charged

 

[cookie73]

I will check the leads from the battery again but battery definitely full charge

 

[jackwhoo]

Do you have a volt meter?
How old is battery?- they don't last forever.

 

[cookie73]

Do you have a volt meter?
How old is battery?- they don't last forever.

Brand new. Put in 2 days ago

 

[jackwhoo]

I wonder if this is a another case of rotten earth strap .
What type of battery charger have you used and how long battery on charge for?

 

[varesecrazy]

I wonder if this is a another case of rotten earth strap .

Even the action of swinging a new battery in then twisting the cable back to the terminal post can be enough to break the circuit

Did @cookie73 say they had recently tried the jumplead trick to replicate the earth cable??

 

[koalar]

Sounds like 30A relay to the ECU
That failing

Fits with both no rev counter and P0657

You can try swapping a couple of identical relays over you might get lucky

However without some basic tools diagnosing problems are very hit and miss

The only information we can get is limited

Does the car centre locking work
Unknown

When you unlock the car does the dash LCD back light come on. Does the remote work
Unknown


When you put the keys in what lights come on
Unknown

After a few seconds of switching the ignition which go off
Unknown

After a few seconds of cranking do any more go off
Unknown


Does the pump prime
Yes

Does the REV counter bounce
No


With the above information

We would know if the body computer is reading the remote

We would know if the key transponder is read by the body computer

We would know the body and ECU were talking to each other

We would know some of the body to dash was working

We would know some of the voltages are present

Which is why some of these questions although seem silly do require answering to help narrowing down the next area of diagnosing

Do you own a multi meter/ or access to one

Do you own a scan tool or access to one

 

[koalar]

P0657 CONGRUENCE OF MAIN RELAY BATTERY VOLTAGE UPSTREAM/DOWNSTREAM - Fiat - GRANDE PUNTO - eLearn - 4CarData

 

[cookie73]

P0654 is likely the error code for wiring issue on the rpm sensor. So check pins on the wiring loom etc. Does the rev counter move when you crank it over

Sounds like 30A relay to the ECU
That failing

Fits with both no rev counter and P0657

You can try swapping a couple of identical relays over you might get lucky

However without some basic tools diagnosing problems are very hit and miss

The only information we can get is limited

Does the car centre locking work
Unknown

When you unlock the car does the dash LCD back light come on. Does the remote work
Unknown


When you put the keys in what lights come on
Unknown

After a few seconds of switching the ignition which go off
Unknown

After a few seconds of cranking do any more go off
Unknown


Does the pump prime
Yes

Does the REV counter bounce
No


With the above information

We would know if the body computer is reading the remote

We would know if the key transponder is read by the body computer

We would know the body and ECU were talking to each other

We would know some of the body to dash was working

We would know some of the voltages are present

Which is why some of these questions although seem silly do require answering to help narrowing down the next area of diagnosing

Do you own a multi meter/ or access to one

Do you own a scan tool or access to one

The key operates everything as it should. All lights on dash come on and go out as they should, leaving on what it should.
I've tried the jump lead earthing which makes no difference.
It now sounds like a machine gun when i turn the key over, so have the booster on the battery now.
I received the AA final findings and attached to this thread

 

[timmycm850]

Are you waiting now for the booster to top the battery up and then give it annother go or is your booster the connect up to the battery big jump pack.

 

[timmycm850]

do wait when you next try it for the fuel pump to fully prime the fuel lines( about 3 seconds)

 

[cookie73]

The key operates everything as it should. All lights on dash come on and go out as they should, leaving on what it should.
I've tried the jump lead earthing which makes no difference.
It now sounds like a machine gun when i turn the key over, so have the booster on the battery now.
I received the AA final findings and attached to this thread

Are you waiting now for the booster to top the battery up and then give it annother go or is your booster the connect up to the battery big jump pack.

Booster topping up the battery.
timmycm850, thank you so much for sharing your knowledge, very much appreciated

 

[cookie73]

I want to thank everyone who has helped me along the way. I've changed the battery, put new end on my engine block earth and changed the Crankshaft sensor.
I am up and running again.
Cheers

 

[timmycm850]

Good result all round.

Can I also thank cookie73 for coming back onto the thread and letting us all know our efforts/info have been useful.

Tim

 

[varesecrazy]

I want to thank everyone who has helped me along the way. I've changed the battery, put new end on my engine block earth and changed the Crankshaft sensor.
I am up and running again.
Cheers

Hi again

So the crank sensor still didnt let it spark...

How did you get it going again??

I am intrigued..