Speed pulse issues.

[Envoy CDX]

OK, a little bit of history here, in my last cav, I fitted Cruise control to a 1.8 MPi engine, never did get it working correctly, well, working full stop. Eventually gave up shortly before deciding the shell was too far gone, anyhow. In my current cav I've fitted a Fuel Computer, calibrated by Ian T (I beleive) - All was well till I've finally fitted the switch to flick between the readings to find that everything is 50% less of what it should be (average speed, approx mileage and so on). So, I fitted a transducer to the box and fed a speed signal in that way - same issue. But, I used the speed impulse from said transducer to another set of (electronic) clocks, same issue again. My question is this, do I need an ABS impulse signal to get the Fc working correctly, and if I can make that work, will my Cruise in theory start working correctly?

Thanks.

I'm currently studying a mod with a relay that Vauxhall use in the Corsa's that don't have ABS - still not 100% sure how I'm going to wire it up though.

[Robsey]

This is a long ongoing issue isn't it Gary,

If I remeber rightly, Ian programs these on a bespoke format.

My query is, has he possibly programmed the wheel diameter parameter wrongly...try a different white memory module.

I run a 1.8CFi, with the computer programmed to a 2.0 engine

My memory code should be 107 or 117, however the actual memory code is 130.
Speed etc is correct exactly to my digital clocks.

Have you got a spare memory module Gary to try?

Only other issue would be the blue/red wiring to the radio, drivers footwell, clocks and the fuel computer. But after careful thought, I am convinced it is the memory module in the fuel computer

Turn on the ignition,
Press both of the big buttons
You will get a code in the top window, and one in the bottom
release the buttons and you will get a number in the bottom window, which relates to the number of pulses that it is set to.

Write them down and let me know what they are, I can confirm if it is set correctly.

[Gaz]

im sure there are 2 transducers with different rates.

[Envoy CDX]

Cheers Rob, Gaz, according to EPC there are about 8-9 transducers across the range. What is bugging me is the fact that the FC doesn't function as it should, and raised doubts about my wiring with the cruise control setup I'd wired in (I know I had everything cock on too)

I'll check the codes on the FC in the AM and write it down. I'll also try another set of wheels with bigger tyres too.

[Robsey]

im sure there are 2 transducers with different rates.

Yep,
Astra Mk2 GTE - Code AK = 8 and 16 pulse

Carlton - Code AH = 25 and 36 pulse I think.

You may find the GTE one works better

[Robsey]

I'm currently studying a mod with a relay that Vauxhall use in the Corsa's that don't have ABS - still not 100% sure how I'm going to wire it up though.

You would need the pulse pick-up, which is mounted somewhere around a drive-shaft

Then the relay has approx 6 wires

To sensor
Sensor return
+12 V to relay
Ground for relay
Signal to clocks
and ground to clocks

I think I sent you a drawing for this last year eh Gary..?

[Envoy CDX]

I'm currently studying a mod with a relay that Vauxhall use in the Corsa's that don't have ABS - still not 100% sure how I'm going to wire it up though.

You would need the pulse pick-up, which is mounted somewhere around a drive-shaft

Then the relay has approx 6 wires

To sensor
Sensor return
+12 V to relay
Ground for relay
Signal to clocks
and ground to clocks

I think I sent you a drawing for this last year eh Gary..?

Possibly, if you still have it. Would be cool
I'll look through my PM's and threads.

[Robsey]

Yes, will dig out my info (from TIS if I remember correctly )

Also I have Ian T's full list of Computer module codes and parameters on an Excel spread sheet if you would like me to pm that to you also.

Ian's ABS Zero site has all the links missing

[Envoy CDX]

Yes, will dig out my info (from TIS if I remember correctly )

Also I have Ian T's full list of Computer module codes and parameters on an Excel spread sheet if you would like me to pm that to you also.

Ian's ABS Zero site has all the links missing

Cheers, as much information as possible if you would ta

[Robsey]

Right the speed pulse amplifier / relay is bright orange, and is found on most corsa-c's without ABS between 2001 and 2006. It is located in the middle of the fuse box in the underhood fuse / relay panel.

Excuse the weird drawing, but this is a rough copy of the sketch in the TIS wiring diagram section!!

Regarding the program / memory module info tables, here is the excel file produced by Ian T on his website (ABS Zero).

memories.xls

(43 KiB) Downloaded 48 times

hope these help

Finally, if you remember, I said that if you hold down both fuel computer buttons, then you will get a code in the top window and a code in the bottom window

The top code will be two letters then two numbers

The letters are the country of usage, the numbers are the version / release No.

In the bottom window you will get a code like 107, or 130 etc...
This is the program number on the memory list above.

Now when you release the buttons, a 4 digit code will show in the bottom window.

This is the number of pulses as follows
6200 = 16200 impulses for 15" wheels
6500 = 16500 impulses for 14" wheels
5*** = 15*** impulses, used for cars with ABS.

[Envoy CDX]

Cheers Rob,

I got the following:

107
EC:01
6500

So I'm guessing it's not coded properly

[Robsey]

It is coded for a 16nz, c16nz, 18nz, c18nz, fitted with 14" wheels,

Which is correct isn't it?

should be 6200 pulses if you have 15" alloys fitted,

Mine was miles out a couple of years ago, however it is now very accurate.
as said above, mine is coded : -
EC: 02
130
6200
ps mine is a c18nz, with 14" steel wheels....odd but true, this should be for a 2.0 with 15 wheels. ??!!

The code you have is correct in my opinion...as long as you have 14" wheels.

[Envoy CDX]

It is infact a 1800, but with 15" alloys.

[Robsey]

Yes, then you have the wrong memory number....should be code 119

Could always lend you mine as it is set up for 15" wheels, then you could see if there is that much difference.

[Envoy CDX]

Yes, then you have the wrong memory number....should be code 119

Could always lend you mine as it is set up for 15" wheels, then you could see if there is that much difference.

Give it a go when you pop up?
I'll email Ian and see if he's willing to reprogram it.

[Robsey]

He doesn't do many of these now, only at meets on the south coast as far as I am led to believe.

This is possibly why most of his web-page links are now broken.

[Envoy CDX]

He doesn't do many of these now, only at meets on the south coast as far as I am led to believe.

This is possibly why most of his web-page links are now broken.

I know he was at the Autojumble in March, thats how I got it done

[Robsey]

I know he was at the Autojumble in March, thats how I got it done

Where was that then...?

I don't get out that much,

maybe I should read more posts...

[Robsey]

I read his website, and on it he explains that he initially built his own memory module programmer...

Hmm, Would be nice to know how he did that, but I would need idiot proof numpty instructions..

[Robsey]

Hi Gary,

Had a good look at TIS, Squigs How 2 and AndyK's How 2 on VxON.

I have PM'd a few ideas on how to achieve this, but also came up with the following layout for the cruise module, which clarifies minor anomolies between the three sources mentioned above...anyway here goes!!

The general gist is...

Pins A, B and C go to the cruise control switch as shown

Pin D is connected to the wire in the auto selector loom
(Pin c in the plug with 4 wires, I believe)

Pin E is the Earth tag

Pin F is the ignition live feed

Pin G is connected to the brake light switch

Pin H is not required except for reprogramming with Tech 1 (Diagnostic)

Pin J is for the instrument tell tale light (not for the auto box connection as suggested elsewhere)

Pin K is for connection to your speed pulse wire.

Hope this helps,

Rob

[Robsey]

I've took a step back and thought "simply" about this.

The easy method to achieve a useable pulse is as follows: -

Fit a Speed Transducer , which has three wires,
1) Black - Ignition live
2) Blue-Red - Speed pulse output
3) Brown - chassis ground

Feed the speed pulse to your pulse frequency converter input

Feed output from converter to pin 3 of you dash panel (blue/red)

Then adjust pulse frequency as per instructions on the Picbits technical forum