quadman

Hi All

i have just done the engine light trick and the following sequence was:

4 flash slow then 3 flash fast

Have any of you got any ideas what this could be????

Many Thanks


QM

dnb

Error code 43. It's apparently a throttle switch.

There is an idle switch built in to the throttle position sensors on early phase 1 engines, so I guess this is what it's refering to.

quadman

will this cause it to loose boost?

quadman

also, any ideas where i find this switch??

dnb

The "43" error code is not one I've seen associated with an Impreza engine before - so I am just assuming it's the throttle switch. It shouldn't cause boost loss. It is in the black box on one side of the throttle body.

My best guess for the boost problem is that you've misread the code - 44 (4 long flashes and 4 short flashes) and 45 could easily cause boost loss. You can find out about these by doing a search for "cleaning boost solenoid" It's a straight forward job using spray brake cleaner.

quadman

Thanks

but i done the cleaning of the solenoid last night and it didn't solve the problem...

the 43 fault is on a Legacy not an impreza

dnb

I thought the engines were more or less the same on the older Impreza and Legacy. I guess there are some subtle differences.

Back to the original suggestion of the throttle idle switch then!

I don't think this will be related to boost, as it only tells the ECU when the car is idling. There's probably a couple of problems rather than a simple cause and effect.

greasemonkey

Maybe an unreliable TPS reading is putting the ECU into safe mode?

Quadman, do you have access to a multimeter?

quadman

yes i do have a multimeter

quadman

so, does anyone know where i find the throttle switch??

dnb

It's in the little black box on the side of the throttle body. Middle top of the engine, just in front of the chargecooler. (Oposite side to the throttle linkage assembly) Sorry, I don't have a pinout handy, but I will look one out if no one else has one.

quadman

thanks

any ideas how much this is going to set me back??

dnb

I don't really know. I suspect that there are some spares in people's cupboards that could be acquired for a reasonably small sum. However, if you're lucky, it'll only be about half an hour messing around with the multimeter. (As the TPS assembly is simply misaligned...)

quadman

hi all

i have changed the throttle switch and it hasn't made any difference. It still comes up with the same code (43)

any other ideas??

dnb

I know it's not exactly the same engine, but assuming it's a pre97 car this might give a few clues...

http://www.jimclarkeracing.co.uk/~sc...iagnostics.pdf may help.

If you haven't already done so, follow the instructions on pages 45 to 47 and 54 to 55 of the PDF file. This should guarantee that there is nothing wrong with the idle switch and throttle position sensor.

I note from reading the above PDF and Chris Palmer's diagnostic page that the idle switch is error 42 and the TPS is error 31. The throttle switch is error 43 - It is obviously different to the idle switch although the idle switch has been referred to as the "throttle switch" to me before now... (Not helpful really )
Sorry for confusing the issue

Legacy owners? Where's that damned throttle switch? - hopefully in the same unit as the TPS and idle switch.

[Edited by dnb - 12/07/2003 10:40:10]

tweenierob

It will be the connector.
Had the same prob with mine, remove wires rom connector and then replace firmly..
Sorted

Rob

hail2thetheif

i know this was pretty much a dead thread....however i'm having the same problem on my V2 Sti import. I get no CEL but...if i plug in the green/black connectors to reset teh ecu after a few min of driving i get code 43. anybody?????

thanks