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Author Topic: CAN message generated from paddles?  (Read 1567 times)
prj
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« Reply #15 on: November 14, 2021, 03:16:01 AM »

Your assumption that the newer mechatronic units would have different inputs is flat out wrong.
When DQ250 a Cxx mechatronic unit goes bad it is always replaced by a Fxx unit, because Cxx are out of production for a long time. Has been like that for ten years or more.
Same for DL501 with Gen1 vs Gen2, if a Gen1 is bad it is replaced with a Gen2.

There is also a replacement software for every single Cxx unit ever made.

So if you wire it up as per the R32 and then flash the R32 software into it, then it will read the analog in.
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elRey
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« Reply #16 on: November 14, 2021, 06:50:29 AM »

I appreciate the correction an additional option. However, I’d prefer the CAN bus route. The wheel is LIN bus. I don’t have an analog wheel. Nor have I yet acquired the means/knowledge to read/write mechatronics. I’m very close to finishing with CAN bus.

I need to stop ECU from sending 0x38A msg, but I don’t have the address for CW_CANs.

Another assumption that I might have wrong is that my dsg actual uses 0x38A for paddles.

Also, I don't understand why the J527 does not send 0x38A itself (on the bench). Does it need to see the dsg on the bus before it sends 0x38A? First things first, disable ECU sending 0x38A. Then maybe the J527 will start sending. If not, then I'll try adding dsg to bench CAN bus. If still no 0x38A from J527, I'll add my CAN node.
« Last Edit: November 14, 2021, 09:52:56 AM by elRey » Logged
terok
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« Reply #17 on: November 15, 2021, 02:45:31 PM »

Gateway sends 0x38A, not ECU or steering column unit.
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elRey
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« Reply #18 on: November 16, 2021, 04:35:20 PM »

Gateway sends 0x38A, not ECU or steering column unit.

ME7.5 032 HF

Quote
FDEF GGCGRA 1.20 Function definition

The GRA operating lever signals are recorded either via HW signals or CAN. from PROKON: CWGRABH (bit 0) = B_gracan
     false: Signals are recorded via HW and must be sent via CAN
     true: Signals are received by the CAN

To activate the CAN, bit 3 must be set in CW_CAN_S.
  It is then decided via B_gracan whether the message should be sent or received.
The same applies to the old GRA message if SY_CAN_CONFIG = 5, 10 or 11.

And the msg itself ,byte 3 bit 2-3, states the source:

Quote
COD_SND: Sender coding
Bit addr. 18, bit num. 2, initial value 0
00 On-board power supply control unit
01 steering column module
10 engine SG
11 not used
RCOS message: mrmGRA

I cofirmed on the bench that ECU was sending 0x38A (only ECU on bus). Once I changed CW_CAN_S.3 (found it), ECU stopped. No 0x38A msgs.   Now with mk4 Cluster, mk4 gateway, mk4 ecu, and 8p a3 steering wheel on bus and confirmed steering wheel sending 0x289 on slow bus, but no 0x38A on fast bus.

As for steering wheel vs gateway sending 0x38A (once ecu is configured correctly), do you happen to have any documentation stating gateway is the source?

Thanks,
Rey
« Last Edit: November 16, 2021, 05:10:10 PM by elRey » Logged
terok
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« Reply #19 on: November 17, 2021, 06:09:39 AM »

Ok i was incorrect. I didin't bother to check FR, but it makes sense on older cars to ECU to send this because there is no steering column unit, nor BCM.
8P A3 (and G5) for example is different. Gateway relays this packet from convenience-CAN to drivetrain-CAN (among many other things).

I have never sniffed what mk4 gateway does, but mk5 works like this.
All CAN versions above 4.0 support this (CANVERS >= 0x9).
Drivertrain-CAN is indeed available on J527, but maybe it is only for steering angle sensor (id 0x0C2).
Are there any coding or adaptation options in J527 (or mk4 gateway) that you could experiment with?
« Last Edit: November 17, 2021, 06:37:10 AM by terok » Logged
Dave9n3
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« Reply #20 on: November 22, 2021, 11:47:06 AM »

CW_CAN_R_0___A = 132AC
CW_CAN_R_1___A = 132AE
CW_CAN_R_2___A = 132B0
CW_CAN_R_3___A = 132B2

CW_CAN_S_0___A = 132B4
CW_CAN_S_1___A = 132B6
CW_CAN_S_2___A = 132B8
CW_CAN_S_3___A = 132BA

Those are the addresses I have for 032HF SW0004. Not tested, but might be of some use to you.
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Dave9n3
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« Reply #21 on: November 22, 2021, 02:51:18 PM »

Your assumption that the newer mechatronic units would have different inputs is flat out wrong.
When DQ250 a Cxx mechatronic unit goes bad it is always replaced by a Fxx unit, because Cxx are out of production for a long time. Has been like that for ten years or more.
Same for DL501 with Gen1 vs Gen2, if a Gen1 is bad it is replaced with a Gen2.

There is also a replacement software for every single Cxx unit ever made.

So if you wire it up as per the R32 and then flash the R32 software into it, then it will read the analog in.

Please forgive my ignorance - but if for example I buy a CXX from a MKV gti, and flash it with the R32 DSG software, the only thing that I would need to change then would be the gear ratio maps, as a bare minimum?
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prj
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« Reply #22 on: November 24, 2021, 12:35:18 PM »

Please forgive my ignorance - but if for example I buy a CXX from a MKV gti, and flash it with the R32 DSG software, the only thing that I would need to change then would be the gear ratio maps, as a bare minimum?
Why would you want a Cxx DSG unit? Those mechatronic units are failure prone. Buy a Exx or Fxx unit (they are the same), find one with the gear ratios you like etc. There's R32 software that goes into a Fxx unit, because if you need a new mechatronic unit for an R32 nobody in the last 10+ years would have sold you a Cxx new, they had a very short production run.
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