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???
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....Originally Written by carmageddon
how do I measure the resistance of the ring??
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!
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
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.....
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?
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..
The patience and virtue of the strong..
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.
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