MJ light - car cut out

[The jiffle king]

Just broken down. Car just cut out and coasted to a stop. Waiting for breakdown recovery, but MJ light is on. (might actually be M.I?)
Any ideas what has happened or what I will be able to do to fix this tomorrow?
I'm only on the blackberry, so could not do a search.
Any ideas welcome
TJK

Edited by The jiffle king on Friday 16th November 18:20

[Harrytsg]

Bumped to entice those of a more knowledgable strain.

Was the 'cut out' electrical I.e. all lights out, or more mechanical as if fuel starved?

More clues would help

[Discopotatoes]

Check the fuel cutoff switch, disconnect the battery and re connect sounds like ECU fault

[The jiffle king]

Mechanical as drive suddenly went, but lights still working. Lights are ok and it's not a battery issue as the car turns over, but does not start

[The jiffle king]

Where is the fuel cut off switch? Happy to disconnect the battery, will give it a try.

Thanks for the quick responses

[Harrytsg]

Fuel cut off is under the dash on passenger side, above your knees if sitting in the seat.

Press to reset.

Cuts fuel off in the event of a crash.

[The jiffle king]

Sorry, another quick question. When I take the keys out of the ignition, the MJ light stays on. Is this normal? Assume so?

[The jiffle king]

Harrytsg said:

Fuel cut off is under the dash on passenger side, above your knees if sitting in the seat.

Press to reset.

Cuts fuel off in the event of a crash.

Sorry to be thick. Assume I need to unscrew the pocket first ( no screwdriver on me, but AA man will have)
Thanks again, had a shocking day at work and this was not needed

[Discopotatoes]

At a guess you may have an iffy immobilier so the battery reset might work, have you tried cycling through the lock un lock on the key fob a few times? You will need to do this after reconnecting the battery too

[Harrytsg]

The jiffle king said:

Harrytsg said:

Fuel cut off is under the dash on passenger side, above your knees if sitting in the seat.

Press to reset.

Cuts fuel off in the event of a crash.

Sorry to be thick. Assume I need to unscrew the pocket first ( no screwdriver on me, but AA man will have)
Thanks again, had a shocking day at work and this was not needed

You should be able to reach under the dash up, towards the front of the car, big round button.

Easier to see when you drop the pocket.

[The jiffle king]

I've had electrical issues with locking the car, so would make sense. Will try fuel cut off, then disconnect battery and the see what I can do about immobilser

Thanks

[The jiffle king]

Just to say thanks to those who replied. Car is now home and will look properly in the light in the morning. Will also post back here exactly what is was
Cheers

[Harrytsg]

We were hoping you were driving home so couldn't reply, hope it's nothing too serious.

[The jiffle king]

Hi,there is no. Earth signal to the injectors and no live feed to the fuel pump. Where does the signal come from to the injectors?

[Discopotatoes]

The jiffle king said:

Hi,there is no. Earth signal to the injectors and no live feed to the fuel pump. Where does the signal come from to the injectors?

Disconnect the ECU wait 5 min then reconnect,
If this doesn't sort it , it's the immobiliser

[The jiffle king]

Thanks for all your help. Car still not working. One relay is constantly on, fuel pump primes, ECU was reset so think immobilser/ alarm. AA guy was with me 2 1/2 hours and eliminated loads of things.
Will get an auto electrian out and work out how to fix

Thanks all once again

[Harrytsg]

Yhm

[blitzracing]

Discopotatoes said:

The jiffle king said:

Hi,there is no. Earth signal to the injectors and no live feed to the fuel pump. Where does the signal come from to the injectors?

Disconnect the ECU wait 5 min then reconnect,
If this doesn't sort it , it's the immobiliser

The injectors have a live 12 volt feed on one side, and are grounded by the ECU when the injectors are opened. Now from memory the 12 volts is applied to the injectors when the main relay closes when the ignition is switched on (first click you hear from the ECU relays). The second fuel pump relay also closes at the same time to prime the pump, but then drops out after a couple of seconds if the engine is not turning- so you here a second click when the pump stops. If the 12 volt feed is missing from the injectors to start with- check the fuses in the ECU loom, there is one for this supply.

Fault finding manual here:

http://www.g33.co.uk/images/PDFS/14cux_fuel_inject...

The MIL light will light if a sensor has failed- but that could just be a side effect of loosing power to say the AFM from the main 12v feed from the ECU.

[Robert Lees]

when i bought mine mil light was on, drove like a pig , wouldn't hold steady revs. ECU gave AFM error, i disconnected lead to AFM reconnected it, All good.