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Author Topic: engine management light on?  (Read 8114 times)

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hol666

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engine management light on?
« on: 01 March 2007, 19:59:40 »
Hi, I appear to have a problem, a week ago, my omega just stopped,  I was doing less than 20 mph.  A mate called out the AA who diagnosed a blocked cat, the light came on when I attempted to restart the car, which did start by the time the AA got to it.
The only way I could get the car to to the exhaust place for a cat was to make a hole before the cat.  I had the cat and lambda replaced and the em light is still on?  The car starts ok from cold but is more hesitant when hot.  Everything was fine before all this so I am bemused, any ideas please? :-[
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Re: engine management light on?
« Reply #1 on: 01 March 2007, 20:33:31 »
Hi mate. :)

Best thing to do is check the fault codes first. See here: http://www.omegaowners.com/forum/YaBB.pl?num=1152601768

Let us know what codes you get.
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hol666

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Re: engine management light on?
« Reply #2 on: 02 March 2007, 19:01:28 »
thanks mate, will check tomorrow and will post up the codes.  :y
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hol666

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Re: engine management light on?
« Reply #3 on: 03 March 2007, 19:22:58 »
 >:( getting fed now, followed the info on the paperclip test, it did nothing.  my ecu is a siemens unit and the car is a 95.  not even a blink, zilch!
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TheBoy

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Re: engine management light on?
« Reply #4 on: 03 March 2007, 19:25:22 »
shorted pins 4 and 6 and turned ign on?
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Re: engine management light on?
« Reply #5 on: 03 March 2007, 19:56:12 »
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shorted pins 4 and 6 and turned ign on?

My thoughts....
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hol666

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Re: engine management light on?
« Reply #6 on: 04 March 2007, 13:12:18 »
 :-[  apparently, I was counting the pins the wrong way.  from top to bottom and not bottom to top, apologies to all due to my screwup.  when the rain stops I'll check again, thanks Mark  :y
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hol666

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Re: engine management light on?
« Reply #7 on: 05 March 2007, 19:09:01 »
ok, have double-checked which pins to use on the diagnostic plug, nothing, not a flash from the eml? could it be the ecu is knackered? really am at a total loss now as to what to do next, surely this can't be an obd2 socket on this age car?

anyone got any ideas? don't want keep throwing cash at her! :'(
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TheBoy

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Re: engine management light on?
« Reply #8 on: 05 March 2007, 19:13:20 »
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ok, have double-checked which pins to use on the diagnostic plug, nothing, not a flash from the eml? could it be the ecu is knackered? really am at a total loss now as to what to do next, surely this can't be an obd2 socket on this age car?

anyone got any ideas? don't want keep throwing cash at her! :'(
You are using the connector under the steering wheel, not the 10 pin cruise loom bolted to the osf suspension turret?  ::)
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hol666

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Re: engine management light on?
« Reply #9 on: 05 March 2007, 19:37:38 »
yes sir, the 16 pin connector in the main fuse box below the steering wheel?  Why? is there another way?
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TheBoy

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Re: engine management light on?
« Reply #10 on: 05 March 2007, 19:56:11 »
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yes sir, the 16 pin connector in the main fuse box below the steering wheel?  Why? is there another way?
No, that is correct.  Some photos of the connector are upside down. Check there are metalic contacts in the holes you are shorting, if not, sure sign you have wrong pins...
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Re: engine management light on?
« Reply #11 on: 05 March 2007, 20:02:30 »
Go under the steering wheel.

Pin 1 is the top right is you look at it (the side nearer the steering column). It will be empty (no pin inside).
Pin 2 is directly below (also blank)
Pin 3 is directly below that (blank again)
Next down is pin 4 (first one with a proper metal socket). Insert wire/paper clip firmly.
Ignore pin 5
Now insert wire/paper clip firmly into pin 6.

Turn on ignition so check lights come on.

Now the orange EM light should start to flash.
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hol666

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Re: engine management light on?
« Reply #12 on: 05 March 2007, 20:20:10 »
pretty certain thats what I did but will double check tomorrow.  However, could there be a possiblity that the ecu is gone?  engine does start and run but with highish tickover, thirsty and hard to start when hot. eml is on permanently.
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TheBoy

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Re: engine management light on?
« Reply #13 on: 05 March 2007, 20:21:40 »
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pretty certain thats what I did but will double check tomorrow.  However, could there be a possiblity that the ecu is gone?  engine does start and run but with highish tickover, thirsty and hard to start when hot. eml is on permanently.
Unlikely.
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Re: engine management light on?
« Reply #14 on: 06 March 2007, 09:20:16 »
Sounds like a faulty coolant temp sensor to be honest.....the codes do need reading though....
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