astra h 1.7cdti u2105 error. dead car

[zorgman]

hi
totally stuck on my car now cannot get it to start so heres what is going on
u2105 fault code can bus error.
no speedo
no tacho
oil light comes on and goes out
esp light on
car with spanner light on
fuel gauge goes to half then drops to 0
no starter ( a relay clicks on engine fusebox)
fully charged battery with 90amp slave using welding cable jump leads.
have changed complete fusebox checked everything in sight now im stuck.
cant find ecu only a circuit board in fuse box and a load of connectors in boot
have read every thing i can find on net but no answers. have seen article on cim unit but indicators lights etc all work.
so now im stuck have only used car for 5 miles since i got it 3 weeks ago (private sale so no going back)
please anyone on here can help as this seems the only place where i can get proper help.

[synkrotronic]

Hi
Disconnect battery.
On diagnostic socket,try to read resistance with digital multimeter,between 6 and 14 pins (can lines).Must read 55-65 Ohm if can lines ok.

Regards

[synkrotronic]

Hi again.
U2105- No communication ABS with Engine
Maybe dashboard problem or need to reprogram car
Remember can bus communicate with all ecm on car(engine,airbag,abs,immo...)

Regards

[smirnoff_rules]

sounds like the ecm ( not ecu )is playing up there about 500 notes too

[obdmaster]

Think the ecm on these is just behind the bumper on the n/s in england that is, and the plugs get full of water as does the loom underneath the covering of loom and corrodes.:top:



On these CAN cars, with CAN problems, do a global test clear all codes and the unit which has the most codes return is USUALLY the faulty unit m8. Learnt this on vectra c what had a CIM problem on opels the CIM unit is the CAN gateway m8.

[racin-snake]

try the connections on the back of the clocks if its like the corsa c then it may be a poor connectin there ?
cheapest option hope someone else can shed some light ?

[Meat-Head]

the word on the street says CIM but it's 11pm on a saturday night.

[cristi_onofrei]

check can line from ABS to engine, is common problem and is cut close to ECM
HI speed CAN : CIM, UEC, ABS, ECM
if exist in this line interruption car don't start

[zorgman]

thanks for info.
only code shown is u2105 (perm) wont clear, will look for the ecm unit sun morn. this cim thing, only thing thats behind wheel is indicator arms

[dafdiagnos]

check can network, should be 60 ohm if ok across can h and can L. if broken circuit, will be 120 ohm. will also get 2.5v can h to earth & 2.5v can L to earth- will determine which side is broken

[Meat-Head]

check can network, should be 60 ohm if ok across can h and can L. if broken circuit, will be 120 ohm. will also get 2.5v can h to earth & 2.5v can L to earth- will determine which side is broken

Is this for ANY can car or just this make/model

Sorry for hijacking.

[obdmaster]

Is this for ANY can car or just this make/model

Sorry for hijacking.


This will help you meat head m8:top:

[zorgman]

intresting reading that pdf. why do i think that ive got a expensive repair on my hands here, but i stick it out im sure that makers are geting far far too technical for thier own good ie: relying far too much on computers to run the car even main dealers dont know what there doing now by what iv read its a case of replace and see what happens with the poor punter paying the cost

[dafdiagnos]

Is this for ANY can car or just this make/model

Sorry for hijacking.
yes mate, this is the norm for any 12 / 24v vehicle can network

[nutloose]

the ecm is usually behind the plastic arch liner of the n/s/f wheel, below the fusebox which is also an active controller on the canbus (H,M and L). Bothof which along with the CIM have to be coded including VIN and PIN as a matched set to properly function.
Water in the "underbonnet module"(fusebox) may cause your faults.
You can connect directly to the modules with diagnostic tools on the bench.

disconnect all non essential controllers and attempt to find the area of canbus causing the fault.

you may find the ecm number is 0281012694

[zorgman]

buying a opcom so i can poke about with car. found ecm that looks fine on connections, swopped fusebox made no differece so hopefully ill have interface in morn. will keep u informed

[nutloose]

fusebox= UEC
under hood electrical cluster.
This component IS coded with VIN and PIN and has options as to what other controllers and circuits are fitted to car.
eg; REC (rear electrical cluster=fusebox in boot)

just swapping them is NOT a great idea.

[zorgman]

got opcom last night and fault shows up as ecm under wing cant see any problems as yet with wiring so thats where ill be concentrating today. ?24 for pass key at vx dealers

[zorgman]

righ tested and retested and during modules check all items show up with no faults, being thru every check i can find but still got exact fault showing up, says ecm present so unplugged it and its gone so its deffo there. one thing i noticed is on screen checking cim the code is yyy. in other words im now stuck as everything is sayings it working, i fault pops on saying dis display fault but it works. somthing is just not right and the dashboard is te key to this ie no speedo, tacho when car towed they stay at zero, the fuel gauge goes to half then to zero and oil light comes on then off plus the no cranking even tho the crank signal is valid a relay clicks but not the starter relay.
ill not give in as its something stupid so do i buy a cim or ecm??

[dalehead]

is it sorted what was it same problem here

[zorgman]

still got the fault, got a brand new cim and it wasnt that so having to do lot more testing. have you had codes read off yet, im only in sunderland if u get stuck

[zorgman]

found the fault, turns out the main ecu/ecm unit was shot but with help off here i would never find fault, got a barand new cim sitting here spare now

[IARllc]

OBDmaster. Thanks for the article on CAN communication. It was really helpful.

[fluorescent]

the ecm is usually behind the plastic arch liner of the n/s/f wheel, below the fusebox which is also an active controller on the canbus (H,M and L). Bothof which along with the CIM have to be coded including VIN and PIN as a matched set to properly function.The immo light blink but i can get conection with immo ecu.
Water in the "underbonnet module"(fusebox) may cause your faults.
You can connect directly to the modules with diagnostic tools on the bench.

disconnect all non essential controllers and attempt to find the area of canbus causing the fault.

you may find the ecm number is 0281012694

Hi, i have a problem with a opel astra 2008 isuzu z17dth 1.7 ecu(ecm) 0 281 012 694, the car wont make intent to start, only have the dash on and windows up and down.
I try to conect with ecm with opcom and nothing, no response from ecu.Also try Autocom and the same, nothing.
Check all the fuses and all ok.
Check ecu read on bench and, nothing.
This is a EDC16C3 ecu?
Do i have to conect with can high and low on the bench, or k-line?
I read ecu with BDM100 on board and read it perfectly.
Somebody have pinouts for this ecu to try read it on bench with op-com? im not sure what i find is corecty.
Thanks.

[mtechno]

Pin data is on autodata but I cannot seem to be able to post screen shot of all the info you need

[fluorescent]

Today i make some advanced work, my opcom seems dont like can diagnostic, y try before change the batery Autocom and bingo, i am in the buisness again.
Got some errors but most important is no corelations with ecu cim and key.
Somebody knows how rematch ecu with cim?
I have all the dumps from ecu from cim.Thanks