EML light

[djshaggeh]

Since putting the XE in I've had a few problems with the EML. When the cars running the light is on but if I earth it out and turn off the engine off I dont get any blink codes.

I have wired in two switches for the power/ignition as I lost the keys. Normally, I guess you earth out the wire from the ECU (cant remember off the top of my head what colour it is) and turn the engine on and off and it displays the blink codes?

Now I guess that mine isnt working beccause I'm turning the power off instead of JUST the engine. So im not giving it anytime/power to display the code?

Am I right or wrong and how do I get round this?
Im poo at cars

[Clean 2.0 nova]

do you mean that you cut all power to the ecu rather than just to the 'engine on' signal wire to the ecu?

[djshaggeh]

Yeh I think so, it was wired up a few months ago but ill check it out tommorow when theres a bt more light.

is this the puppy?

Black - Black (the ignition live connect up on the XE/LET loom you will find is a single wire around the gearbox area of the loom. It should be in its own little single plug but these tend to get cut so you may find you have just a single black wire somewhere between the end of the loom and the end of the fuel rail. You can either feed an ignition live from the nova loom into the bay and connect it up there, tap into a feed near the ECU (you will need to suitably seal off the wire in the bay and tape up in the loom) or run the wire back down the loom (you'll need to solder and extend it) into the car so you keep all your connections in the footwell.

I guess ill be needing three switches electrics, ignition live and start?

[Clean 2.0 nova]

Your ECU will need a permanent supply (red wire) and the switched input (black wire). The EML won't work properly if you don't have the red permanently connected IMO. The ECU needs power for its memory to store characteristics about your particular engine in order to run better / more economically.

[djshaggeh]

Currently:

The thick red cable for the ECU is going directly to the battery with no switches.

The Black igntion live cable (that one that runs to somewhere near the gearbox) has been wired to one of the thick red wires before the electrics on switch.

Hope this makes sense

[Lee]

Currently:



The Black igntion live cable (that one that runs to somewhere near the gearbox) has been wired to one of the thick red wires before the electrics on switch.

If you've wired switched live to a red wire, it wont be turning off when you cut the ignition. it needs to be run to a BLACK wire in the nova's loom.

[djshaggeh]

Sweet - found where, behind the dash?
Does it matter if I wire it with one wire connected to a block connector with two wires coming off?

[Lee]

Sweet - found where, behind the dash?
Does it matter if I wire it with one wire connected to a block connector with two wires coming off?

Any switched live wire will do the trick. I would stick a fuse inline as well to protect the ECU.

[djshaggeh]

If you've wired switched live to a red wire, it wont be turning off when you cut the ignition. it needs to be run to a BLACK wire in the nova's loom.

I have two switches one for electrics and a push button start. I cant turn ignition off unless I cut the power. This is baffling me.

[Clean 2.0 nova]

If the ECU black is on a permanent feed instead of switched your engine won't know when you want to turn it off and hence the engine will carry on running unless another part of the circuit is cut, i.e. fuel pump supply. I take it the 'push button start' is only for the starter motor only and the other switch you have is for dashboard / instrument items etc. It is the latter that also needs to switch the ECU black wire.

Iain