2003 vectra-c no low speed canbus comms

[busaman]

2003 vectra-c no low speed canbus comms i have replaced the cim and programmed it.

the problem startrd with a window not closing propperly a few weeks later no indicators or hazzards. now it wont start, no central locks, the dash comes and goes, no heater fan, radio, no interior lamps, the headlamps come on at will.??????

i have just about taken the car apart checking wires.

it has all high speed comms
cim
abs
engine
steeing

no comms with rec,bcm,underhood module, left door module, right door module,airbag, & dis.

has anyone had this before.

[obdmaster]

2003 vectra-c no low speed canbus comms i have replaced the cim and programmed it.

the problem startrd with a window not closing propperly a few weeks later no indicators or hazzards. now it wont start, no central locks, the dash comes and goes, no heater fan, radio, no interior lamps, the headlamps come on at will.??????

i have just about taken the car apart checking wires.

it has all high speed comms
cim
abs
engine
steeing

no comms with rec,bcm,underhood module, left door module, right door module,airbag, & dis.

has anyone had this before.

I had exactly same m8, and it was CIM unit , was your replacement unit new m8?

[busaman]

yes a new one from the dealer.

[busaman]

any other ideas this is really doing my head in if i clear the fault codes then re read them it changes somtimes 14 codes another time 10 the next 4 then 12 there is no sense or pattern to it.

[florinyes]

Hi mate
on a astra h I've had a fuse blown and car behaved as yours..
Fuse in the boot box.

Hope it helps..

[Meat-Head]

The window is possability the switch was 'collapsed' have to be vague
but what happens is a 'lip' press the button to work the window, this 'lip' breaks off, so there is no pressure to work the window.

50 quid from stealer, save old switch can be used to repair the next one and make lots of money for noting

M-H-M in these circumstanses would disconnect one thing at a time and see if it likes it.

e.g. unplug drivers door and see if it just say

'door missing, love DK long time' or the same faults, dude.

[florinyes]

Had a Zafira B today, car came in to erase crash data. Had no comms with airbag, instruments, underhood electrical centre, rear electrical centre.
After checking fuses in the boot had comms and job completed.

So double check rear fuse box.

Ta

[robsey]

On the Vectra-c there are two lines of attack. if the CIM is new and has been programmed in correctly.

1) Check fuse 10 in the fuseboard on the end of the dashpanel ( box cover has the airbag sticker on it)

2) Cars made before 2004 have been known to have faulty ABS module connectors. The module is fine, but the connectors can be dodgey due to dirt / corrosion.
They need to be checked over, and to have their pins cleaned. also ensure that the pins and connections are secure.

[mage]

Canbus faults can be hard to find.
Normaly i disconnect one by one the modules that are on that netwerk and look if communication then is possible.
I would start diconnecting left door module or right door module first.
If that not helps I measure the voltage on High/Low wires on that network
I measure High to -, Low to - and between High and Low

[busaman]

ok i replaced the cim and bcm it runs the lights all work c/locks etc but rear windows dont work on the switch but do in actuators and aircon doesnt work.

[Meat-Head]

ok i replaced the cim and bcm it runs the lights all work c/locks etc but rear windows dont work on the switch but do in actuators and aircon doesnt work.

1) aircon read the a/c pressure in live data (if it has it)
2) strip the rear switches, have to be vague:

Imagine a woman's high heeled shoe*, as you lift her toes the heel, 'dig in' simular with the switch, except the 'heel' breaks, try poking the mebraine with a blunt object


* No got an EEPROM fetish though.

[busaman]

i have checked the pressure in live data all good and i dont think it will be the switches all the problems came a once.

[florinyes]

Try disconnecting one ecu at a time (the ones on the low can) and scan after each disconnection.

Regards