Hi Guys.

I get the error message "Can't connect to ECU" in Uniscan 1.83.

I've made a cable with these connections:
K-line to the RED/WHITE wire in the 3 pin connector.
Chassis GND to the BLACK wire in the 3 pin connector.
Signal GND to the LIGHT BLUE/WHITE wire in the 3 pin connector.

As far as i can see the BLACK wire is connected to the welded chassis GND.
So only 2 wires to get placed correct.

I've seen a lot to posts where the K-line is described as a white wire, but i have two wires where the color white is used.

Is there anybody who has the pinout with wire colors on this connector?

Cheers Michael

just checking....are you sure you have the right plug?

connect the chassis ground directly to the car rather than the plug.

i think from memory my wire colour is also red/white

the connector is number 5 on this diagram

https://www.fiatforum.com/attachment.php?attachmentid=6329&d=1123415701

Hi Guys.

Thanks for your quick replies.
My enginebay is a bit different from your drawing, see attachment.
(1997, 1.6 16V Marea)
The connector (8) is placed on a plastic cover protecting the absolute pressure sensor.
I really assume it's the correct connector, it's called tester socket on the drawing.

The Chassis ground is connected to GND in the cars wire harness, and i also connect it to the battery negative terminal in my cable.
I've meassured the Uniscan cable connections, and they connect signal- and
chassis GND together.

I've checked the K-line LED on the interface box and it flashes during
the enable procedure, but when trying to read error messages it's OFF.
and then i get the error message.

I can connect to the Airbag ECU, so the interface box is OK.
And i choose the correct ECU type on the list... damn...

Cheers
Michael

sorry Michael, your in a bit of a world of your own there, i've never touched a 1.6

hopefully someone can offer some advice!

Ry

Hi Bulldog

Yep, i've noticed you British guys mostly drives the large engine Mareas
We don't see them so offen in DK, mostly the ones with small engines like mine...
We have a very high tax on cars
Just checked a 2000 1.6 ELX Estiva with a desent milage is 6250£ here....
What is the price in GB?

Cheers Michael

£600-£1000 seems to be an average price for a 2.0 Ive added a link to Autotrader loads of cars on here
http://search.autotrader.co.uk/es-u...s=&ukcarsearch_full.x=76&ukcarsearch_full.y=7

Migaard said:

Hi Bulldog

Yep, i've noticed you British guys mostly drives the large engine Mareas
We don't see them so offen in DK, mostly the ones with small engines like mine...
We have a very high tax on cars
Just checked a 2000 1.6 ELX Estiva with a desent milage is 6250£ here....
What is the price in GB?

Cheers Michael

Click to expand...

holy hell! how much?!

i paid £1500 for my 20v 2.5years ago & £500 for my 2.4JTD in january.

i'll sell you my 20v Turbo cheap if you like, £4000

Ry

Damn Guys... No wonder you prefer the large engine models...
See http://www.bilzonen.dk/find-din-bil?body_type_id=-200&sort_by=9&variant=hlx&altTemplate=bilzonen.dk+-+search+detail&ad_car_id=597320&ad_number=3&dt=201&tab=&
and devide the price with 8 and you have it in pounds... 10.000 Pounds for a 1999 2.0 HLX Marea.

But should there be another poor owner of a 1.6 16V Marea, that knows the pinout of the ECU tester socket please help...:worship:

New situation:

I've tried to connect again today and what happend?
Now i can't even connect to the interface box:bang:
I get the message "Connect ECU reader or check power supply"
Tried swapping the com ports, but still no joy, the message is the same...
The power supply is fine and the power LED is ON.

I really need to get this s... working, i need to solve a problem before MOT.
Does anybody know the password for setting up the com ports in UNISCAN 1.83?

Any help is highly appriciated.
Cheers Michael

I have a different examiner altogether. May try Elmscan one day in the future.

Not sure how Uniscan works, but you will need a 12V source. I dont hear any mention of a 12V power source? Pin 16 on the ODB or run 12V from your battery to your diagnostic tool, unless it has its own 12V source. The K line is used for information, the ground and signal ground on my cable are bridged. How does Uniscan work? Is it a handheld unit, that displays the error codes or is it a box that sits between the car and a laptop?

Hi Joske.

The Uniscan is a ODB -> RS232 converter with its own PC software.
It's only for ISO protocol, not CAN. Covers most pre-ODB cars.
I communicates using 2 com ports one for K-line and one for L-line.
It should work with ABS, Airbag, Immobilizer and engine management ECU.
You can read and clear error codes, read all sensor values and test actuators.

BUT i can't connect to the engine management ECU...:bang:
I must be doing something wrong, cause i can't connect to the ABS ECU either.
I'm using the same PC as i did when i cleared an Airbag fault not 3 months ago.
It's power supplied directly from the battery, the power LED is ON, so it should be OK.
Damn...

Cheers Michael

JoskeJTD said:

I have a different examiner altogether. May try Elmscan one day in the future.

Not sure how Uniscan works, but you will need a 12V source. I dont hear any mention of a 12V power source? Pin 16 on the ODB or run 12V from your battery to your diagnostic tool, unless it has its own 12V source. The K line is used for information, the ground and signal ground on my cable are bridged. How does Uniscan work? Is it a handheld unit, that displays the error codes or is it a box that sits between the car and a laptop?

Click to expand...

Its a '97 model it uses the 3pin connector rather than the OBD connector fitted to the later vehicles. ELMscan or any ELM interface wouldnt work with it unfortunately.

Dan

Migaard said:

Hi Joske.

The Uniscan is a ODB -> RS232 converter with its own PC software.
It's only for ISO protocol, not CAN. Covers most pre-ODB cars.
I communicates using 2 com ports one for K-line and one for L-line.
It should work with ABS, Airbag, Immobilizer and engine management ECU.
You can read and clear error codes, read all sensor values and test actuators.

BUT i can't connect to the engine management ECU...:bang:
I must be doing something wrong, cause i can't connect to the ABS ECU either.
I'm using the same PC as i did when i cleared an Airbag fault not 3 months ago.
It's power supplied directly from the battery, the power LED is ON, so it should be OK.
Damn...

Cheers Michael

Click to expand...

Do you have a multitester? If you have a multitester you can try set it to voltage mode and monitor the K line to see if the voltage drops when the init sequence is sent. I think the K-Line only cars send a 5baud init sequece so should be easy to see on the multimeter. If you can do this make sure the car is connected to the +12v source as it will need this.

It does sound like the uniscan is maybe at fault.

Dan

have you tried communicating using just a hyperterm session or similar?

it sounds as if you may have the bit rates/baud rate etc set incorrectly, it should say somewhere on the interface device.... or in the manual....

danhans115 said:

Its a '97 model it uses the 3pin connector rather than the OBD connector fitted to the later vehicles. ELMscan or any ELM interface wouldnt work with it unfortunately.

Dan

Click to expand...

Hi Dan the ELMScan works. Just dont own one.

Im thinking can you read the airbag ECU and ABS ECU again with no problems? If so its something to do with the ECU setup you have. Are you selecting the proper ECU. Try KWP2000 protocol.

Joske

Hi Guys

Thanks for all the replies, it's great

I've access to a oscilloscope / logic analyzer in the weekend and i will look for the init sequence.
My Fiat workshop manual states the Init is send at the L-line (see attachment) but that must be rubbish, there's only the K-line in the connector...

I'm about to give up on this uniscan box...
I assume the ECU's are OK, because i can't connect to any of the ECU's anymore.

I might try antoher PC to see if that helps.
I've checked the COM port adr. and they are OK, but the Interupt request is different on COM2 than on the Uniscan, but i'm uncertain if this is the fault
it has been working resently with the same settings.
I need the f...... :bang: password to uniscan to alter the settings in the program.
I'm pissed cause the program came without any instructions and they made a password protection to enter the setup, but what's the password?
I've searched the internet for it, but without luck.

Can anybody confirm that the K-line is the white/red wire in the 3 pin connector?

Cheers Michael

Migaard said:

Hi Guys

Thanks for all the replies, it's great

I've access to a oscilloscope / logic analyzer in the weekend and i will look for the init sequence.
My Fiat workshop manual states the Init is send at the L-line (see attachment) but that must be rubbish, there's only the K-line in the connector...

I'm about to give up on this uniscan box...
I assume the ECU's are OK, because i can't connect to any of the ECU's anymore.

I might try antoher PC to see if that helps.
I've checked the COM port adr. and they are OK, but the Interupt request is different on COM2 than on the Uniscan, but i'm uncertain if this is the fault
it has been working resently with the same settings.
I need the f...... :bang: password to uniscan to alter the settings in the program.
I'm pissed cause the program came without any instructions and they made a password protection to enter the setup, but what's the password?
I've searched the internet for it, but without luck.

Can anybody confirm that the K-line is the white/red wire in the 3 pin connector?

Cheers Michael

Click to expand...

Well if you now cannot connect to any ECU's then the uniscan box is either broke or setup incorrectly. But as you already mentioned it worked the other ECUs on the same settings i can only assume the box is faulty. I dont have any knowledge of the uniscan device.

In regards to the data line (K-Line) then yes its the white wire.

Hi!

I've got Uniscan tackle, the setup menu password that worked for me was TEC.

It is possible you might have a fault in your tackle, unfortunately as my car's in multitudinous bits and pieces for alternator replacement I've not had chance to try my tackle out yet!!!

Have you got the small black unit sold on ebay similar to mine? - if so I'll see if I can get you the diagrams of the electronics, there's not a lot to 'em!!!

If you have a ferret about on Google and (shhhh!!!!) file-sharers you can get plans, pcb layouts and the programming code to make yourself a new one if you're good at electronics-building and (Cyrillic!!!) circuit diagrams!!!

Also one of the 3-pin sockets in the car engine is only used for the anti-theft alarm unit in the passenger door and Uniscan has no facilities to read this, so you may be simply using the wrong plug-hole, try 'em all in turn!!!

The K-Line is White-Red, Earth Black, and I've not seen a White-Blue on any of the diag. holes in my car so I'm not sure what that one is for!!!

Keep us posted and I'll draw out my unit if you need more help!!!

Chris Williams