problem with opel astra

[skoulias]

hello i have in my workshop opel astra-h 2007year ,when i try to star the car it seems that is not going to start but at the end the car starts. the trouble code are : b3110 Remote key 2 system voltage low voltage
U2100 No communication with can-bus (high speed)

[daewo97]

I think it's a problem with CIM,

[adiagnostyka]

Voltage??? low voltage kill communikation

[cactikid]

ignition switch fault maybe?

[obdmaster]

Astra h has no ignition switch, it has a cim unit????

[skoulias]

yes it has cim this model

[Mrubbert]

Had same or similar problem with astra h 2005. Revs but no start, take out key and wait 5 sec, and it starts directly.

Got 1 key faultcode - wrong key, not low battery.
Always canbus codes - forget that ones.

Most people think about soldering cim problem - i dident touch mine because problem dident come back after check connections under hood ECU. More then 1 year driving every day, no problems. BUT still got faultcodes, wrong key and canbus bla.bla.bla. Magic or lucky fingers, i cant tell.

@Cactikid, have small fragment of memory that in bottom or behind of key cylinder switch is a mecanism that gets stucked specially on this modell and you get this symtom. Remove cylinder and check it.

I wrote about this here in DK and many have write about cim.
Try search Astra Cim.

And ofcourse how is it with key 1 info. ?

[Mrubbert]

Of topic with same car.
Generator light comes on when driving more then 10km only in higher speed 120 +
Charging stabel 14,5 v with different rev.
I know ECU is checking voltage, so i try to check cabel from generator to ECU, one more time disconnect ECU connector. My schematic dident match (thought cabel was broke) and put it back.
Same shit here magic or lucky, generator light never come back on :)
Atleast not in 15000 km when we own the car.

[racin-snake]

try checking the earths under the uec they sometimes need a clean and re tighten

[skoulias]

i check his all an ok but i check the fuel pump and i have change the fuel pump all the system but the problem has the change is the same , when i try to start the car the first time is very very hard to start the engine but when at i try to start the car the second time the engine start easier then the first time

[Meat-Head]

try checking the earths under the uec they sometimes need a clean and re tighten


Yeah thanks for that, we had one where the nut was MISSING - think look down side of battery, hard to see, but it's laughing at you.

[skoulias]

i solve the problem is the crankshaft sensor

[Meat-Head]

how did you decide that, or did you phone a freiend?