[Ovmsdev] OVMS ODBII Cable
Michael Balzer
dexter at expeedo.de
Wed Dec 5 02:31:58 HKT 2012
Looks correct.
1 m length should make placing the module in the right (lockable) glove
box possible, so that's OK too.
I had to pay EUR 10 = ~ US$ 13 for the OBD2 plug alone, so the pricing
will be fine.
Regards,
Michael
Am 04.12.2012 06:06, schrieb Mark Webb-Johnson:
>
> I've found a manufacturer for the cable, that seems quite good and
> professional. I haven't used them before, but they come recommended. I
> also tendered for this, and they were not the cheapest response, but
> in the lowest 10%. Quality seems very good, and they specialise in
> manufacturing automotive cables so should know what they are doing.
>
> Based on our specification:
>
> J1962-M DB9-F Signal
> 4 3 Chassis/Power GND
> 6 7 CAN-H
> 14 2 CAN-L
> 16 9 +12V Vehicle Power
>
> J1962 end should be MALE plug with right angle cable. DB9 end
> should be FEMALE.
> Both ends should be enclosed in shells, and cable should be 1metre
> in length.
>
>
> The resulting build spec sheet is shown below.
>
> Sorry it is mostly in Chinese, but the most important points are (a)
> the pinouts, (b) the 1m length, (c) the use of a right-angled ODBII
> connector, (d) the connectors types, (e) the pinouts, and (f) did I
> mention the pinouts?
>
> Could you guys check this out, and confirm it looks ok from your point
> of view? Something standard that the Twizy, Volt/Ampera and other
> users could get behind?
>
> We are going to have to pay upfront for at least 100 of these, so need
> to be certain it is correct. Pricing is going to be around US$9 -
> US$10 per cable (including worldwide shipping), which I think is
> pretty good.
>
> Thanks, Mark.
>
>
> On 12 Nov, 2012, at 7:09 PM, Mark Webb-Johnson wrote:
>
>>
>> I've found a couple of manufacturers willing to do this for a
>> reasonable price (at a quantity of perhaps 50 to 100 units).
>>
>> Is the specification below ok? Any problems?
>>
>> Regards, Mark.
>>
>> On 11 Nov, 2012, at 1:36 PM, Mark Webb-Johnson <mark at webb-johnson.net
>> <mailto:mark at webb-johnson.net>> wrote:
>>
>>>
>>> OK, so I think the pinouts we require are as per Michael B's diagram:
>>>
>>>
>>> <OVMS-OBD2-cable.png>
>>>
>>> _J1962-M__DB9-F__Signal_
>>> 43Chassis/Power GND
>>> 67CAN-H
>>> 142CAN-L
>>> 169+12V Vehicle Power
>>>
>>>
>>> A right angle J1962-M plug and about 1metre cable should be ok.
>>>
>>> This one cable should support both Twizy and Volt/Ampera, and also
>>> any ODBII car with an ODBII compliant CAN bus.
>>>
>>> Does that sound ok?
>>>
>>> I'll ask around in China to see if I can find someone to make these
>>> up cheaply, and get them on Fasttech.
>>>
>>> Regards, Mark.
>>>
>>> On 11 Nov, 2012, at 7:50 AM, Michael Balzer <dexter at expeedo.de
>>> <mailto:dexter at expeedo.de>> wrote:
>>>
>>>> For the record: I now have connected GND to both 4+5 on the OBD2
>>>> plug, works as well.
>>>>
>>>> Regards,
>>>> Michael
>>>>
>>>>
>>>> Am 10.11.2012 19:57, schrieb mikeljo at me.com:
>>>>> Hi,
>>>>>
>>>>> i use this pinout:
>>>>>
>>>>> Primary Data Link Connector- (DLC) X84 *Under drivers side of IP
>>>>>
>>>>> Pin 1 is Low Speed GMLAN (SWCAN ~33.3kbps) - Body Electrical
>>>>> Services Only Pin 2-3 Unused
>>>>> Pin 4 chassis ground (for scan tool)
>>>>> Pin 5 data reference ground
>>>>>
>>>>> Pins 6(+) & 14 (-) High Speed GMLAN- Primary Powertrain Bus (DWCAN
>>>>> ~500 kbps) Pins 7-11 Unused
>>>>> Pins 12(+) & 13(-) High Speed GMLAN- Chassis Expansion Bus (DWCAN
>>>>> ~500 kbps) Pin 15 Unused
>>>>>
>>>>> Pin 16 B+ (for scan tool power)
>>>>>
>>>>> OBDIISub-DSignal
>>>>> 169+12V
>>>>> 46+3GND-Chassis
>>>>> 67CAN_H
>>>>> 142CAN_L
>>>>>
>>>>> I connect 6 and 3 at the Sub-D side together.
>>>>> So it looks like we can use the same Cable (for the Primary Can
>>>>> Bus in the Volt). >> Fasttech?
>>>>>
>>>>> Bye
>>>>> Michael
>>>>>
>>>>>
>>>>>
>>>>> Am 10.11.2012 um 06:47 schrieb Mark Webb-Johnson
>>>>> <mark at webb-johnson.net <mailto:mark at webb-johnson.net>>:
>>>>>
>>>>>> Yes, chassis GND vs signal GND, but can is differential, so no
>>>>>> GND needed for the signal. We only need GND for 12V power. For
>>>>>> vehicles, I think chassis GND is ok.
>>>>>>
>>>>>> I think Volt bus we are using is on the same pins:
>>>>>>
>>>>>> http://www.evtools.info/ChevyVoltOBD2CAN.html
>>>>>>
>>>>>> Maybe 1 cable can do both?
>>>>>>
>>>>>> Regards, Mark
>>>>>>
>>>>>> On 10 Nov, 2012, at 12:18 PM, Michael Balzer <dexter at expeedo.de
>>>>>> <mailto:dexter at expeedo.de>> wrote:
>>>>>>
>>>>>>> Mark,
>>>>>>>
>>>>>>> yes, that's chassis ground -- shouldn't it be? I interpreted the
>>>>>>> OVMS GND as the ground for the supply voltage (12V), as the CAN
>>>>>>> bus has its dedicated "low" line.
>>>>>>>
>>>>>>> I just looked up some OBD2 sites: 4+5 normally are the same. One
>>>>>>> page says an OBD2 cable should have identical potential on 4 and
>>>>>>> 5 to ensure proper function. Another OBD2 cable I bought
>>>>>>> connects them, so maybe for a general product GND should connect
>>>>>>> both, but I don't think there's a difference on the car side...
>>>>>>> normally.
>>>>>>>
>>>>>>> But I've also seen some info on non standard OBD2 plugs, also
>>>>>>> for some GM and Opel cars, having other signals where the CAN
>>>>>>> bus should be, so I'm also interested in your pinout, Michael J.
>>>>>>>
>>>>>>> Regards,
>>>>>>> Michael
>>>>>>>
>>>>>>>
>>>>>>> Am 10.11.2012 04:23, schrieb Mark Webb-Johnson:
>>>>>>>> Michael,
>>>>>>>>
>>>>>>>> One question: you have GND on pin #4 (odb). I have that shown
>>>>>>>> as chassis ground, not signal ground. Is that correct?
>>>>>>>>
>>>>>>>> Michael J: is that the same connector and pins as you are using
>>>>>>>> for the Volt?
>>>>>>>>
>>>>>>>> Regards, Mark
>>>>>>>>
>>>>>>>> On 10 Nov, 2012, at 2:16 AM, Michael Balzer <dexter at expeedo.de
>>>>>>>> <mailto:dexter at expeedo.de>> wrote:
>>>>>>>>
>>>>>>>>> Mark,
>>>>>>>>>
>>>>>>>>> great to hear about user activity :-)
>>>>>>>>>
>>>>>>>>> 1) I just created an OVMS to OBD2 cable image and checked it in:
>>>>>>>>> https://github.com/dexterbg/Open-Vehicle-Monitoring-System/commit/a7c3a3e8f12d7759b896bb75c8e570ebc10ec11a
>>>>>>>>> As OBD2 is standard incl. CAN pinout, this should be valid for
>>>>>>>>> any OBD2 port, so could be added to the FastTech OVMS product
>>>>>>>>> line. It's not a standard cable, or at least none I know of.
>>>>>>>>>
>>>>>>>>> 2) No known way up to now. I also think the Twizy would not
>>>>>>>>> respond to the port, as the whole CAN bus is quiet when the
>>>>>>>>> car is off and not charging. Plus, because the charger draws
>>>>>>>>> some 30-35 W for many hours after charging has completed, many
>>>>>>>>> drivers use auto-power-off sockets.
>>>>>>>>>
>>>>>>>>> 3) I'll forward your specification to the german Twizy forum.
>>>>>>>>>
>>>>>>>>> Regards,
>>>>>>>>> Michael
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Am 09.11.2012 15:23, schrieb Mark Webb-Johnson:
>>>>>>>>>>
>>>>>>>>>> Twizy support seems to be coming along nicely, thanks to the
>>>>>>>>>> amazing work Michael is doing. Some good functionality there
>>>>>>>>>> already.
>>>>>>>>>>
>>>>>>>>>> I'm starting to see some Twizy users register on
>>>>>>>>>> openvehicles.com <http://openvehicles.com/>. Perhaps the word
>>>>>>>>>> is getting out?
>>>>>>>>>>
>>>>>>>>>> Some questions / requests:
>>>>>>>>>>
>>>>>>>>>> 1. Michael: Can you let me have the details on the cable
>>>>>>>>>> pinouts and parts you are using at the moment? Is it a
>>>>>>>>>> standard cable, or are you having to make something up?
>>>>>>>>>>
>>>>>>>>>> 2. How is charge control on the Twizy done? Is there any way
>>>>>>>>>> of stopping or starting (topup) a charge from within the
>>>>>>>>>> car, or is it just controlled by plugging? Any chance of
>>>>>>>>>> can bus control of this?
>>>>>>>>>>
>>>>>>>>>> 3. Can anyone help with the car images for the Twizy? There
>>>>>>>>>> are lots of nice images available, but they need to be
>>>>>>>>>> photoshopped to the right dimensions and transparent
>>>>>>>>>> background png.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Regards, Mark.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> OvmsDev mailing list
>>>>>>>>>> OvmsDev at lists.teslaclub.hk
>>>>>>>>>> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Michael Balzer * Paradestr. 8 * D-42107 Wuppertal
>>>>>>>>> Fon 0202 / 272 2201 * Handy 0176 / 206 989 26
>>>>>>>>> <dexter.vcf>
>>>>>>>>> _______________________________________________
>>>>>>>>> OvmsDev mailing list
>>>>>>>>> OvmsDev at lists.teslaclub.hk <mailto:OvmsDev at lists.teslaclub.hk>
>>>>>>>>> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> OvmsDev mailing list
>>>>>>>> OvmsDev at lists.teslaclub.hk
>>>>>>>> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev
>>>>>>>
>>>>>>> --
>>>>>>> Michael Balzer * Paradestr. 8 * D-42107 Wuppertal
>>>>>>> Fon 0202 / 272 2201 * Handy 0176 / 206 989 26
>>>>>>> <dexter.vcf>
>>>>>>> _______________________________________________
>>>>>>> OvmsDev mailing list
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>>>>>>> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev
>>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> OvmsDev mailing list
>>>>> OvmsDev at lists.teslaclub.hk
>>>>> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev
>>>>
>>>> --
>>>> Michael Balzer * Paradestr. 8 * D-42107 Wuppertal
>>>> Fon 0202 / 272 2201 * Handy 0176 / 206 989 26
>>>> <dexter.vcf>_______________________________________________
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>>>
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>>
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>
>
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--
Michael Balzer * Paradestr. 8 * D-42107 Wuppertal
Fon 0202 / 272 2201 * Handy 0176 / 206 989 26
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