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Greg Szczygiel
Greg Szczygiel, UK Car Mechanic
Category: Car
Satisfied Customers: 12
Experience:  Vehicle technician and electrician currently working in reputable independent garage in UK. Fully acredited ATA diagnostic technician.
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coil fuse keeps blowing

Resolved Question:

coil fuse keeps blowing
Submitted: 2 years ago.
Category: Car
Expert:  Shantal-Mod replied 2 years ago.
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Expert:  Greg Szczygiel replied 2 years ago.
,
Could you confirm the model of your Nissan please ?
Customer: replied 2 years ago.

Thanks back.

It's an Almera E Auto

Petrol

1769cc

Expert:  Greg Szczygiel replied 2 years ago.
again,
I will need a little bit more information to correctly diagnose the issue.
Could you answer to the following?
1.What is the fuse number ?
2.What is the fuse rating ?
3.In which fuse box is it located?
Many thanks
Greg
Customer: replied 2 years ago.

Greg

1 it's the coil fuse

2. 15amps

3. the fuse box near the radiator - slightly to the right (of the radiator) when facing the car bonnet.

Regards

Salim

Expert:  Greg Szczygiel replied 2 years ago.
Salim,
I will need specific fuse number to look this up.
Cheers
Customer: replied 2 years ago.

Greg

I'll check and get back to you a little later today.

Regards

Salim

Expert:  Greg Szczygiel replied 2 years ago.
Is it fuse no 34 or no 42 ?
Cheers
Customer: replied 2 years ago.

Greg

I cannot find a number fuse. On the cover of the fuse box it's called "IGS FOIL"

Regards

Salim

Customer: replied 2 years ago.

Greg

I cannot find a number fuse. On the cover of the fuse box it's called "IGS FOIL"

Regards

Salim

Expert:  Greg Szczygiel replied 2 years ago.
Salim.
On this type of ignition system a capacitor is fitted between power supply to the ignition coils and ground wire.
Measure the resistance of the capacitor it should be above 1Mohm.
Check the continuity betwee capacitor's terminal 2 to ground.
Check the resistance when engine is hot this may be the reason fuse.
Because there is 4 individual coils on your car I suggest to do the following in order to find what is causing the fuse to blow.
Check short circuits to the live wire supplying power to the coils.
Check ECM relay under the bonnet, if it is internally short it will also cause the fuse to blow.
To be honest the only quick way to check the relay is to replace it with genuine nissan relay.
Do not try to fit non genuine relay.
There may be one or more coils becoming to draw more current once the engine has been running of time.
So as you can see there is 4 possible causes.
My advise is to start troubleshooting in this order :
1.Check in capacitor and continuity to ground.
2.Check coil power supply wire circuits.
3.Replace the relay with genuine nissan part.
4.Measure current drawn by each ignition coil with amp meter.
Do all the above just after the fuse has blown, you will have more chance to find the fault.
I hope this answers your question,
I'm happy to assit you further.
Greg
Customer: replied 2 years ago.

Greg,

I gave you list to the chap who was trying to fix the car. He believes it could be the capacitor, which needs changing, having checked the other items on your list. Hopefully that should fix it - fingers cross :).

Many thanks Greg the possible cause so well.

Just wondered - the dash has been playing up number of years. I have learned to live with it. Whenever the car warms up the lcd display stops functioning. Could the problem be related?

Kind regards

Salim

Expert:  Greg Szczygiel replied 2 years ago.
Salim,
Ignition coil circuit has no common wires or connections with lcd display so It is not related.
Hopefully your car will be fixed soon .
Greg
Greg Szczygiel, UK Car Mechanic
Category: Car
Satisfied Customers: 12
Experience: Vehicle technician and electrician currently working in reputable independent garage in UK. Fully acredited ATA diagnostic technician.
Greg Szczygiel and other Car Specialists are ready to help you
Customer: replied 2 years ago.

Dear Greg

Many thanks expert help.

All the best

Salim

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