Another Cruise Control Thread - Page 3 - Alfa Romeo Forum
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Sorry, my laptop died this weekend.
I've been replying through my work computer.

I haven't made the light connection yet.
Will probably do it tomorrow.

If in FES it says cruise on and all signals work it should work.

Mine didn't work the first time.
Then I switched it on and you have to press speed + in order for the cruise to start working or else it doesn't do nothing.

I let it stay with speed plus a bit until the car start pulling on its own.

Have you tried that?
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Forgot to post about pin numbers.

If you trace the bulb with a multimeter it will give you other connections as it is linked with other bulbs.
In Elearn diagrams it says the trailer indicator light is pin 2 +ve, and its ground is common to all other lamps on pin 14 of the other connector.

Elearn diagrams have never let me down

Cheers!
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So if I was to connect a +ve to pin 2 on the rev counter and run from pin 14 on the rev counter back to the relevant pin for the cc lamp on the ECU, that should work?
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No, pin 14 of connector A is common to all lamps, so it's always connected to GND.
If you put +ve on pin 2 of connector B the trailer indictor light should be constantly on.

You have to find a way to invert the -ve signal that comes from the engine ecu.
It should be possible to do so with a relay.
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Aaah yes, of course! :slap:
But if I was to put a new lamp in for this purpose, then I would just run a positive to the lamp, then back to the ECU - I assume the ECU will switch the -ve to work the light in this situation?
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I think it will.
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OK, I will have to give that a try.
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Think I found a problem with the cruise control not activating.

Everything is showing ok to and from the ECU

After a 30 mile round trip still its not active.

Can some one confirm the operation/location of the second brake switch please.
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Quote:
Originally Posted by Alecto28 View Post
Forgot to post about pin numbers.

If you trace the bulb with a multimeter it will give you other connections as it is linked with other bulbs.
In Elearn diagrams it says the trailer indicator light is pin 2 +ve, and its ground is common to all other lamps on pin 14 of the other connector.

Elearn diagrams have never let me down

Cheers!
Tested this with pin 14-ve and +ve to pin 2 and nothing lights up.
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Just saw the picture.

You have more things related to cruise control than me.

Mine doesn't show the one about the light, the learn, the 2nd brake, or off.

I believe you should have a learn feature somewhere in FES.

About the 2nd brake switch, I'll try and see in the diagrams what pin is it so you can shunt it with the switch you already have.

Have you tried pin 2 connector B +ve and pin 14 connector A -ve?
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Quote:
Originally Posted by Alecto28 View Post
Just saw the picture.

You have more things related to cruise control than me.

Mine doesn't show the one about the light, the learn, the 2nd brake, or off.

I believe you should have a learn feature somewhere in FES.

About the 2nd brake switch, I'll try and see in the diagrams what pin is it so you can shunt it with the switch you already have.

Have you tried pin 2 connector B +ve and pin 14 connector A -ve?
Yes this works.

But not much use if the rest of its dysfunctional
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Have you tried in the adjustments tab the cruise control re-learn option?

In the descriptions it says it's needed when you retrofit a cruise stalk.

Cheers!
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Quote:
Originally Posted by Alecto28 View Post
Have you tried in the adjustments tab the cruise control re-learn option?

In the descriptions it says it's needed when you retrofit a cruise stalk.

Cheers!
No

Its in Binji's post on the first page of this thread DOH !!!!

Its pin 54 on the ECU needs the brake switch connected to it, will be doing it tomorrow.

From E Learn

Functional description

The switch H7 is supplied when the ignition is switched on (INT) - pin 3 - from the line protected by the fuse F1 for the junction unit B1.

Control H7 is connected to management unit M10:

to pin 53 of connector A, with the ON/OFF signal
to pin 55 of connector A, with RES signal
to pin 57 of connector A, with the SET + signal
to pin 56 of connector A, with the SET - signal
The 'pedal released' signal for double switch I30, on the other hand, is sent to the engine management control unit M10 - pin 54 of connector A.

For the management of the Cruise Control function the control unit also uses the signal at pin 61 of connector A of M10 coming from the clutch pedal switch I31 and the accelerator pedal potentiometer K55 See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT signals.

To turn on the Cruise Control warning light, engine management unit M10 sends a signal - pin 1 of connector A - to check module E30 which is supplied by a line protected by fuse F4 of the additional fuse box B98B.

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Ok, but that option to re-learn appears in FES?
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Ok, but that option to re-learn appears in FES?
Yes
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Well I've given up.

For now.

There's a 4 wire brake light switch needed, this supply's constant 12 +ve to pin 54 and is interrupted when the brake pedal is pressed.

perhaps when I have more enthusiasm I will get back on it.

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Your car only has a 2 wire swtich?

That switch works the same way right? Providing constant 12v to ecu and interrupted when the brake is pressed.
So, perhaps you can just shunt the wire you already have in that switch with pin 54.
You could see what pin it goes to and just make the connection in the ecu connector.
It would be a lot easier than changing the switch and make the connection.

Cheers!
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No its different you cant use the existing switch.

The 4 wire switch has two contact sets, one to make (lights) and one to break (cruise) connection when pressed.

I tried with a constant 12 +ve on pin 54 anyway and it still didn't work.
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Oh, I see.

The cruise learn function doesn't work with the +ve on pin54?
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Just saw this incase you need it:

Alfa Romeo 156 Switches

Cheers!
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Looks like the cruise learning state requires a few more things to be active to the ecu other than a few wires from the stalk.

ECU ISO Code: FD 86 0E 80 E6
04/04/2011 14:13:51
CONNECTED TO:
ALFA 156 2.4 JTD
Bosch EDC15C7 CF3/EOBD Diesel Injection (1.9, 2.4)
--------------------------------------------------------------

ECU ISO code: FD 86 0E 80 E6
FIAT drawing number: 46821767
Hardware number: 0281010336
Hardware version: 00
Software number: 1037362086
Software version: 7400
Homologation number: 156A5B
ECU programming date: 07/02/2001

EXECUTING ADJUSTMENT...
Cruise Control Re-Learn
FAILED TO EXECUTE
Incorrect conditions to run this test!

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+):

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested
Set Cruise deceler.(-): Not requested

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested
Set Cruise deceler.(-): Not requested

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested
Set Cruise deceler.(-): Not requested
Cruise restore button (RCL):

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested
Set Cruise deceler.(-): Not requested
Cruise restore button (RCL): Released

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested
Set Cruise deceler.(-): Not requested
Cruise restore button (RCL): Released
Cruise control: Not active

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested
Set Cruise deceler.(-): Not requested
Cruise restore button (RCL): Released
Cruise control: Not active
Cruise Control Indicator Light: OFF

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested
Set Cruise deceler.(-): Not requested
Cruise restore button (RCL): Released
Cruise control: Not active
Cruise Control Indicator Light: OFF
Cruise Disable Cause: OFF

READ PARAMETERS:
Brake Contact 2: Closed
Cruise Switch: ON
Set Cruise acceler.(+): Not requested
Set Cruise deceler.(-): Not requested
Cruise restore button (RCL): Released
Cruise control: Not active
Cruise Control Indicator Light: OFF
Cruise Disable Cause: OFF
Cruise Control Learnt:

Last edited by Alfa 156 JTD; 05-04-11 at 19:25.
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FES doesn't say what are the conditions needed to run the test does it?

Maybe the car has to be running at a speed that the cruise works, maybe more than 30 Mph...

The closed brake contact is +ve to pin 54, right?

Cheers!
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