Multiecuscan Alfa GT 3.2 v6 - Alfa Romeo Forum
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Multiecuscan Alfa GT 3.2 v6

Hello

Does anyone know which pin is used for scanning Body Computer on GT 3.2 V6? 9 or 12 or even 14? This is on a ELM327 interface cable
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two screws under the steering wheel and it will show itself in all its glory
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you can see the pin connections here:
Multiecuscan - Diagnostics software for Italian cars

according to that page, for gt 3.2 :
Body Computer Marelli (937) |INFO|DTC|PRM|ACT|ADJ| ELM OBDKey

so unmodified ELM327 interface
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Originally Posted by jwq View Post
you can see the pin connections here:
Multiecuscan - Diagnostics software for Italian cars

according to that page, for gt 3.2 :
Body Computer Marelli (937) |INFO|DTC|PRM|ACT|ADJ| ELM OBDKey

so unmodified ELM327 interface
Yeah I saw that which should mean on pin 7 default but cannot connect to Marelli 937...weird
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OK, tested last night, on pin 7 I get access to the engine control unit, pin 1 I get ABS control unit but on pins 8,9, 12,13 I get nothing. Even when I bridged them all single connection, the multiecuscan software only picks up the Engine CU. The elm327 is both K line and CAN access so I dont understand. Also, in the elm327, there is only one wire default pin 7, how is this supposed to pickup all units with the other pins having no connecting wire? It's also of those self-switching (apparently) connections but what is it switching to? blank connections?

I really want to buy a licence for the software but I cant connect to what I want to connect to, read somewhere you can only connect to those units once you have paid for the software? But I should still pick it up when I scan
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The body computer is accessed through the Can bus so you need to use an ELM327 interface together with MultiECUscan
Are you sure you don't have one of these cheap Chinese ELM327 interfaces that don't work properly?
Have you tried with another ELM interface
To access the ABS and Airbag you need the Green/Red/Yellow adapeters
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The body computer is accessed through the Can bus so you need to use an ELM327 interface together with MultiECUscan
Are you sure you don't have one of these cheap Chinese ELM327 interfaces that don't work properly?
Have you tried with another ELM interface
To access the ABS and Airbag you need the Green/Red/Yellow adapters
I dunno if it is a cheap Chinese model (aren't they all made in China?) but it is an auto switching one, supposed to switch modules by itself but doesn't.

Yeah, if I want ABS I solder bridge from pin 7 to 1 and for airbag to pin 3 but according to the schematics body computer is pin 8. I tried a bridge to pin 8, 9 12, 13....nothing, when I do a scan on multiecuscan it only finds engine ECU.

I checked and mine doesn't have that capacitor that needs replacing, as I mentioned, it is also a auto-switching but there are no wires to the other pins so maybe I have been shagged bareback again?

Could it be that you can only access body computer if you have a registered version of multiecuscan? It mentions on their website that even with the free version you should still be able to conenct to the info screen but I can't even find the module via scan.
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How can it be autoswitching if there are no wires to other pins ?? I also don't think MES supports this, so how can it do autoswitching ??
I think you need an elm327 adapter and cables (or official multiplex unit + MES mpx, but that is more expensive: Multiecuscan - Diagnostics software for Italian cars )
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How can it be autoswitching if there are no wires to other pins ?? I also don't think MES supports this, so how can it do autoswitching ??
That's what I said when I opened it....

Damn you Mao Tse-tung!!!
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I have interface and cables similar to this

http://www.ebay.co.uk/itm/ELM-OBD2-4...kAAOSw~gRVxyZC

and it works
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yup, similar to that one without the cables. It is supposed to read CAN and K-lines maybe I also need a VAG adapter

It is ELM v1.5, on the multiecuscan website it says it will work with the default ELM interface but upon connection to pin8 (body computer Marelli) it says need VAG???
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Quote:
Originally Posted by Aramis View Post
It is ELM v1.5, on the multiecuscan website it says it will work with the default ELM interface but upon connection to pin8 (body computer Marelli) it says need VAG???
Where do you find this information on MultiECUscan?

According to the web page you should be able to connect to the Body computer if you use an ELM interface or an OBDKey

Multiecuscan - Diagnostics software for Italian cars
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Originally Posted by Henrik_45 View Post
Where do you find this information on MultiECUscan?

According to the web page you should be able to connect to the Body computer if you use an ELM interface or an OBDKey

Multiecuscan - Diagnostics software for Italian cars
Yes, on the website it shows ELM is able to connect by default to body computer, mine doesn't, default pin was pin 7 and pin 7 is Motor Control Unit
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Quote:
Originally Posted by Aramis View Post
Yes, on the website it shows ELM is able to connect by default to body computer, mine doesn't, default pin was pin 7 and pin 7 is Motor Control Unit
Ok, the ELM interface I have is an ELMScan 5 USB Interface and I am pretty sure it has connection to pin 7 and to the CAN bus on pin 6 and pin 14
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For info, these are the OBD connections :

<snip>
Packet print

DIAGNOSTIC MULTIPLE CONNECTOR

DIAGNOSTIC MULTIPLE CONNECTOR - DESCRIPTION

The car is equipped with numerous self-diagnostic electronic control units.

When a tester (Examiner or other instrument) is connected to the control units, self-diagnostic data can be read (parameters, errors) or active testing can be carried out.

All tester lines are connected to the EOBD (European On Board Diagnosis) connector in line with EC directive 98/69 - ISO standard J1962, centralised on the Body Computer - connector G.

Nodes conected to the network are connected via the B-CAN while the vehicle dynamic control network is tested via special K lines.

The following are controlled via the B-CAN network:

underfacia control unit;
instrument panel;
door control unit;
radio or integrated radio-phone-navigation system device;
climate control system ECU.
For more details

See E1050 CAN CONNECTION LINES

The following are controlled via tester line K:

engine management control unit;
ABS control unit;
Airbag control unit;
SELESPEED control unit (if fitted).
the gas discharge headlamp control units (if fitted)

DIAGNOSTIC MULTIPLE CONNECTOR - FUNCTIONAL DESCRIPTION

The centralised EOBD tester connector is built into Body Computer

M1 - connector G.
It is supplied directly at pin 16 from a line from fuse F39 of underfacia control unit

B2;
pins 4 and 5 are earthed.

Pin 1 is connected by line K to the ABS control unit

M50 See E7020 ABS
Pin 3 is connected by line K to the Air Bag control unit

M60
Pin 7 is connected to the engine management control unit

M10 via a K line or .
See E7030 AIRBAG

Pin 7 is also connected to the SELESPEED control unit

M54 .
If fitted, the gas discharge headlamp control units

F10 and F11 are connected to pin 12.
Pins 6 and 14 are connected to the B-CAN network. Underfacia control unit

B2, instrument panel E50, door control unit H44, radio (or built in radio-telephone-navigator) P20 and climate control ECU M70 are monitored and ''diagnosed'' via this network.
Pins 2 and 10 are supplied for testing via the C-CAN network, which is not used in this version.
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