Alfa Romeo Gt 1.9 jtdm 150 hp error can

[rego88]

hi guys, I have in the workshop a alfa gt 1.9 jtdm 150 hp, sometimes on the framework I have error code, error vcd, error asr.....
in the engine diagnosis I: u1600 electronic key and u1700 can network (ncm-nbc)

in the body computer, I find: b1023 serial line W.....

to someone ? ever happened to you??? I open the body computer to see if c'? water or what???

what do you think???

[carmageddon]

if c ? an error back to the can why? do not measure the resistance of the ring in the moment in which you have the defect?
you may have a lack of dialogue due to an ecu of the many linked in can and not have consent to goodwill or other problems

[rego88]

if c ? an error back to the can why? do not measure the resistance of the ring in the moment in which you have the defect?
you may have a lack of dialogue due to an ecu of the many linked in can and not have consent to goodwill or other problems

thank you carma of info.... today I removed the body, I found the plug behind a little disconnected..... reconnecting the toto.... but nada.... now the problem ? re....
how do I measure the resistance of the ring??

[giama'a]

what that means garma to check the resistance between the two wires that should be 60 ohms.
If the problem ? a control unit is necessary to understand what' ? and the only way (that I know of) ? to disconnect one unit at a time, and figure out which shuts off the communication or occupies the line for a malfunction

[rego88]

I honestly today I've done a thousand tests.... the strange thing.... I made the case.... when the problem occurs, if I insist with the key turn on and off repeatedly.... at the end part.... seems like a rel? that does not switch.... a similar thing, but the rel? I've tried them all and they are all good.... the units that are in the can... are: ecu, abs-ecu, body computer and the car radio, right??
the problem says that it is on the node between the ncm and the ncb.... which I interpret as the body computer node, and the node control unit engine.....
so I think that the problem at this point is the body itself....
tomorrow I try to change the body with one another gt, I do the clone, and I'll try it.....
we'll see what comes out.....

[carmageddon]

what that means garma to check the resistance between the two wires that should be 60 ohms.
If the problem ? a control unit is necessary to understand what' ? and the only way (that I know of) ? to disconnect one unit at a time, and figure out which shuts off the communication or occupies the line for a malfunction

the resistance of the line CAN ? 120 ohm!

[carmageddon]

thank you carma of info.... today I removed the body, I found the plug behind a little disconnected..... reconnecting the toto.... but nada.... now the problem ? re....
how do I measure the resistance of the ring??

multimeter to measure the resistance and read the value between can H and can L, if the value read is not ? 120 ohm you have a problem

[obd75]

if you have the possibbilit? with the fault do the test to put the bike with the 5 digits of the eletronic code.
with a diagnosis on the network board, you can see the control units in the can, if they are present,absent or with errors.even if according to me,if the fault can communication ? this should not porer dialogue.
however, between all the units I suspect more I would have them in respect of the body(which does not exclude the other).

p.s the value of 120ohm ? a standard value for the can lines or ? valid only for fiat group?

[Backgroop]

hello guys 120ohm and the value of the B-CAN while here we speak of the C-CAN, which must have a resistance equal to 60ohm.. the wiring of interest to be measured and twisted with threads of brown and green that connect to the BCM (body computer) AND CCM(engine control unit) the pins that are affected are 37 can-H and 36 can-L on the connector To the body computer located on the front, and connect you pin 83, 84 of the engine control unit to the connector side of the wiring.. then from the engine control unit part in the output of the twisted pair on pins 61 and 62 that goes on the ABS OR the Esp depends on the set up. I would recommend you try the continuity? and the resistance with reference to ground in the wiring from the body and goes on the engine control unit..

[rego88]

thanks a lot guys.... then.... a few things to clarify.... first.... if it was a cable cut on the can network, or malcontattante.... for what reason, and with the car is stationary, immobile, I try to turn 10 times the key and 9 times by the error, and once you start???
the network can honestly how it works I have not understood ....
as said, the user backgroop practically from the engine control unit there are 2 pairs of can.... a couple goes to the body, the other pair goes to the abs-ecu....
but I the fault I find between ncm and nbc.... then I identifies the defect between the body and the engine control unit... so my deduction ? that is the problem ? them....
I explained politely where to go with the elm scan to see all the units present??
how do I start with the codecard???
I the tests I've done and all ? everything is ok.... at this point there is only the body that you want to clone.....

does anyone know how should I connect the UPA to make the clone of the body computer???

thanks a lot fellow dele info.....

[carmageddon]

hello guys 120ohm and the value of the B-CAN while here we speak of the C-CAN, which must have a resistance equal to 60ohm.. the wiring of interest to be measured and twisted with threads of brown and green that connect to the BCM (body computer) AND CCM(engine control unit) the pins that are affected are 37 can-H and 36 can-L on the connector To the body computer located on the front, and connect you pin 83, 84 of the engine control unit to the connector side of the wiring.. then from the engine control unit part in the output of the twisted pair on pins 61 and 62 that goes on the ABS OR the Esp depends on the set up. I would recommend you try the continuity? and the resistance with reference to ground in the wiring from the body and goes on the engine control unit..

between the B-can and C can not change the R internal why? the first ecu and the ecu will always have the R closure 120 ohm, it will only change the speed? data transfer (C) can 10 kbps to 125 kbps and C can from 125 kbps to 500 kbps)...obviously I was wrong to indicate 120 ohms as the total value why? really? ? 60 ohms (R in parallel) so if you measure ir? of 60 ohms or 120 ohms c ? a communication problem.

[rego88]

between the B-can and C can not change the R internal why? the first ecu and the ecu will always have the R closure 120 ohm, it will only change the speed? data transfer (C) can 10 kbps to 125 kbps and C can from 125 kbps to 500 kbps)...obviously I was wrong to indicate 120 ohms as the total value why? really? ? 60 ohms (R in parallel) so if you measure ir? of 60 ohms or 120 ohms c ? a communication problem.
sorry carma, practically out, for example, the comb of the ecu and in the moment that makes me the error between the pin 83 and 84 of the ecu, the engine would have to find or 60 or 120ohm resistance??? or do I need to measure with the comb attached and the ignition is on??? sorry..... and how to distinguish the b can c can?? where runs the b and where runs the c can.... however, I was checking now.... and despite the fact that the airbag light turns on and off easily at the time of the power on.... I'm not supposed to find the ecu is active on the line??? I find it not as present as I asked all the controllers connected....

[carmageddon]

not ? important to know if ? A can B can C can-why? the R sealing ring are 120 ohm....among the various families of the network can only change the speed? data transfer and there? for which they are implemented.

the measurement is with the ignition switched off...but I don't know if the R of the closure may be in the wiring or internal to the ecu (I believe in the wiring to distinguish the first ecu from last)...with 2 R in parallel with 120 ohm resistance the final measured must? be 60 ohms

[Backgroop]

not ? important to know if ? A can B can C can-why? the R sealing ring are 120 ohm....among the various families of the network can only change the speed? data transfer and there? for which they are implemented.

the measurement is with the ignition switched off...but I don't know if the R of the closure may be in the wiring or internal to the ecu (I believe in the wiring to distinguish the first ecu from last)...with 2 R in parallel with 120 ohm resistance the final measured must? be 60 ohms

The network that are interested in this case and the C-can, which connects the body computer to the engine control unit and ABS, the resistors are internal to the control units are not integrated to the harness, the measure of 60 ohms must be a closed network without disconnecting anything.. in practice, it must be measured the resistance between the green wire and brown on the body or on the ccm.. another test to do, and test the voltages of the network with reference to ground this framework, on, with everything connected.. to the voltage of the can-H and can-L) with reference to ground must be equal to +- 2.5 v .. on that car ? also, there is a network W, this network works in case of emergency so that the can bus has a problem..

[giama'a]

on Can networks-C and we have a value of 60 Ohms because the termination resistors are 2 120 Ohm placed in parallel and the architecture of their connection to the result if the functional sar? 60 Ohm resistor..

[rego88]

thanks to all for the interest..... then... here is resolved, what is the line w..... virtually how to get it ? a safety line if it does not work the can line... pretty much guys.... tonight I noticed one thing....
practically, after having heated the engine.... back in the workshop, the car after 5 minutes, as usual, presented the usual problem.... the ecu's you can find all ok, the engine control unit does not activate... in the engine diagnosis I log in, but I don't see anything, as if the ecu is active.... but frozen....
if, instead, the car does the check and ? everything is ok, by quietly, diagnosis can the engine control unit found active, the diagnosis engine all ok....
I want to do the last tests to measure all the values of the can line, but to measure the resistance with the controllers connected, I have to strip the wires of the can bus??

[rego88]

yesterday, after 1000 trials.... we came to the conclusion... the problem lies in the ecu of the engine....
we measured the can line to the oscilloscope and everything ? ok, the power supply and the masses are ok...
are now looking for an ecu 0 281 011 511 ;)

[carmageddon]