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[Marks DTM Calib]

Single wire is diagnostic socket only.

CAN H and L are the only CAN wiring on the ESP module and are on the engine CAN system.

So its a single wire Diag connection, how very quaint!

That's worth checking, it is a car from the Mercedes bad period of awful wiring and electronic integration

[terry paget]

Any chance you could tell us un-initiated what the "BattleBus" is? I've searched for Battle Bus in previous posts and can't decide if its an Omega, Astra G or Zafira.

I got reams and reams of info when trying to track down the circuit diagrams for a facelift Omega. If you could tell me the car model, year, engine and gearbox then I might be able to locate some information. I've looked through all the likely Omega B stuff and cant find any reference to C1022.

The battle bus is Jaime's zafira Mk1, but I see no mention of it in this thread 

Thank you. I beg senior forum members to define abbreviations they intend to use early in a thread, rather than writing in slang or code which they all understand but other members may not. On page 3 I am still wondering what vehicle 'the Barge' is, as for ESP, BAS, SAM, NIS, CAN, it's like Cockney rhyming slang.

[Doctor Gollum]

Single wire is diagnostic socket only.

CAN H and L are the only CAN wiring on the ESP module and are on the engine CAN system.

So its a single wire Diag connection, how very quaint!

That's worth checking, it is a car from the Mercedes bad period of awful wiring and electronic integration

[Doctor Gollum]

Any chance you could tell us un-initiated what the "BattleBus" is? I've searched for Battle Bus in previous posts and can't decide if its an Omega, Astra G or Zafira.

I got reams and reams of info when trying to track down the circuit diagrams for a facelift Omega. If you could tell me the car model, year, engine and gearbox then I might be able to locate some information. I've looked through all the likely Omega B stuff and cant find any reference to C1022.

The battle bus is Jaime's zafira Mk1, but I see no mention of it in this thread 

Thank you. I beg senior forum members to define abbreviations they intend to use early in a thread, rather than writing in slang or code which they all understand but other members may not. On page 3 I am still wondering what vehicle 'the Barge' is, as for ESP, BAS, SAM, NIS, CAN, it's like Cockney rhyming slang.

The Barge is referenced in the 'So what...' thread, but for clarification it's a '99/00 Mercedes S280 

[YZ250]

......
On page 3 I am still wondering what vehicle 'the Barge' is, as for ESP, BAS, SAM, NIS, CAN, it's like Cockney rhyming slang.

Terry, you may have missed Al's wheel poll for 'The Barge'. This was how we knew what car he was talking about. He had posted some bits in the 'What have you done' thread.    The other abbreviations are just the usual car systems, such as ESP (Electronic Stability Program), BAS (Brake Assist), SAM (Signal Aquisition Module) etc. 

https://photos.app.goo.gl/EBVxq29yrUB8yDFu6
.....

Edit: I see you had replied Al but I'd written this so I'll reply anyway. Obviously you'll want to keep the thread on track though. 

[Doctor Gollum]

As on track as the wiring, anyways

[Doctor Gollum]

Right, progress. Of sorts.

Quick insight to the CANBUS magickery on the Barge.

The engine CANBUS circuits have two connection nodes... one under the passenger foot well, and one behind the dash.

The ESP module connects to the foot well one, and the engine (and instrument cluster) connects to the one behind the dash. These two nodes are connected via a plug also under the passenger foot well.

There is also a further CANBUS power distribution block under the steering column, although the only things plugged into it are H and L CANBUS wires, ie no traditional power and no official connection to the ESP module... it would appear to connect the primary modules... engine/instruments/shifter/EIS/SAMS.

So, to the progress...

ESP H and L CANBUS shows no breaks all the way to the cluster plug. I didn't pull the dash to access that node, but did check for continuity at the footwell node, both sides of the footwell plug and the cluster.

The single diagnostic wire also shows continuity all the way to the cluster and OBD2 port.

Now here comes the hiccup.

I also found continuity between the ESP H Line, both the dedicated CANBUS wires (between the instrument cluster and the CANBUS power distribution block) and a feed to the cluster from F22 in the front left SAM.

To confirm, there's definite continuity between the ESP module H line and F22 when tested at the SAM, (they all live in the same SAM so easy enough). F22 provides permanent power to the Nav system. I had previously found damage to  a couple of the wires at the power distribution block which were patched up along with undoing the starter button bodge the previous owner had had done

I suspect, that there's either a pinch or damage on the cluster loom, which may well require the dash to be pulled to investigate/rectify.

[dave the builder]

sounds promising 

and you know how the dash comes out 

should have it out in half the time second time round 

[STEMO]

When did cars start getting Extra Sensory Perception? I knew they'd come on a bit but f**k me 

[dave the builder]

When did cars start getting Extra Sensory Perception? I knew they'd come on a bit but f**k me 

when some drivers stopped using their eyes and ears and common sense 

[Doctor Gollum]

I forgot to check for codes after tinkering...

Now also have B1097 upper control panel not communicating to CAN.

Not a surprise, it makes a Dodo look healthy and code reader can't link to it or the instrument cluster... Although it transpires that F22 powers that, so it was royally pissed at being started with the fuse out

[Doctor Gollum]

When did cars start getting Extra Sensory Perception? I knew they'd come on a bit but f**k me 

Obviously, being German, it can't tell me what's wrong... ESP or not

[dave the builder]

Buy a gallon of petrol while it's less than a quid a litre , oh , and a box of matches        

[Doctor Gollum]

Well, went back over it... Still can't connect to either the upper dash switch panel or the instrument cluster even though both respective connections to the diagnostic port are sound.

Still has the B1097 code within the rear SAM in relation to the upper dash switch panel CAN communication fault, even though, again, the wiring is sound. 

I now have a headache and it's lunch time.

[Doctor Gollum]

I shall revert to a more traditional approach... And leave the battery off overnight. At least that way, with no electrickery in it, it won't be broken...