lost comp sat nav and audio

paulvasey · Dec 23, 2012

thats seems about it adam

Saint.V8 · Dec 23, 2012

My feeling is the only common thing that links all these systems is the Data Stream called the I Bus......as attached....

Datatek · Dec 23, 2012

ukadamwest said:
question for datatek..

do you think it's possible the fuse box has taken a dump (as you diagnosed for me with my A/C issue)?

edit to add: no experience with the L322 just trying to correlate how things may transfer over from the last of the P38's to the L322!

I don't think the fuse box is likely to be the problem. I have limited experience, but I do know that corroded connectors in the the kit in the rear can kill a lot of stuff, not sure though if it can affect the message centre so it may be there are 2 separate faults. From memory it also affects the CAN BUS.

Datatek · Dec 23, 2012

Saint.V8 said:
My feeling is the only common thing that links all these systems is the Data Stream called the I Bus......as attached....

That's what I was calling CAN BUS.

paulvasey · Dec 23, 2012

where will i find this offending bit of kit??

Datatek · Dec 23, 2012

paulvasey said:
where will i find this offending bit of kit??

It's the cabling that all the units connect to, that's why all connectors need to be carefully checked.

Saint.V8 · Dec 23, 2012

The I Bus is the not an item....it is the data network all the ICE system talk to eachother and the Diagnotics system on....like a computer Ethernet cable....

There may be nothing wrong with it, just seems odd that it is common to all the system you have not working....

I am trying to read up on it and how it works at the moment!

Datatek · Dec 23, 2012

Saint.V8 said:
The I Bus is the not an item....it is the data network all the ICE system talk to eachother and the Diagnotics system on....like a computer Ethernet cable....

There may be nothing wrong with it, just seems odd that it is common to all the system you have not working....

I am trying to read up on it and how it works at the moment!

I never found the need to get that technical (I'm lazy) It was obvious that the connectors were the problem.

paulvasey · Dec 23, 2012

i see, will there not be some kinda master junction where they all connect?

Datatek · Dec 23, 2012

paulvasey said:
i see, will there not be some kinda master junction where they all connect?

No, it goes from unit to unit in the loom.

paulvasey · Dec 23, 2012

my instrument pack is still ok though, just the messge center part is out, and my diagnostic socket works

paulvasey · Dec 23, 2012

would testbook 4 pinpoint it? or just point out a fault?

2.0_hippo · Dec 23, 2012

paulvasey said:
would testbook 4 pinpoint it? or just point out a fault?

Doubt it if all comms didn't

Saint.V8 · Dec 23, 2012

Instrument Pack is driven from the BCU, the CANBus, K Bus, I Bus, M Bus are just data networks...your diagnostic socket may work just fine as that is on the Diagnostic Bus...

paulvasey · Dec 23, 2012

well ive got a bit to go on,see what tommorow brings

paulvasey · Dec 24, 2012

right, spent a few hours checking and rechecking all connections in rear quater for corrosion , found no sign of any of missing pins, sprayed em all with contact cleaner.still all dead. however all comms is now showing 1 bus fault on instrument pack which i guess isnt supprising as saint pointed out

paulvasey · Dec 26, 2012

still no nearer fixing this fault, if i remove each module on l bus and try to clear the fault as i take each one out, will this trace the fault or will the removal of a module result in a fault being recorded because it is disconected, the only fault showing on all coms is on the intrument pack recorded as l bus fault

Datatek · Dec 26, 2012

paulvasey said:
still no nearer fixing this fault, if i remove each module on l bus and try to clear the fault as i take each one out, will this trace the fault or will the removal of a module result in a fault being recorded because it is disconected, the only fault showing on all coms is on the intrument pack recorded as l bus fault

I bus loops in and out as far as I can see so removing a module breaks the circuit at that point.
Look at my DSP thread just posted.

paulvasey · Dec 26, 2012

so it wouldnt work then? iv seen your pics very nice but i can assure you mine are nothing like those, out of interest what was the recrded fault in your friends case?

Datatek · Dec 26, 2012

paulvasey said:
so it wouldnt work then? iv seen your pics very nice but i can assure you mine are nothing like those, out of interest what was the recrded fault in your friends case?

We don't have diagnostics for the L322 but the symptoms are similar to yours

lost comp sat nav and audio

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