Hacking the CAN-Interior Bus
01-05-2014, 10:52 AM
#21
Thanks for that info. Although my JK has the RES, I have a RBZ to play with. Question: does your Jeep have the Infinity amp? If so, do you see commands going to the amp?
I wasn't sure it was on the bus but there seems to be some radio recognition that the amp is present. I think the level drops and two channels are turned off.
I wasn't sure it was on the bus but there seems to be some radio recognition that the amp is present. I think the level drops and two channels are turned off.
Both the radio and infinity amp are tied into the CANBUS. RES radio will not function correctly without the amp. Both have CANBUS feed lines.
I removed most of the CANBUS wiring from my car.... and to my amazement, very few issues came out of it. Assumed the PCM was going to have a conniption, but as it turns out, the Jeep will call out a network error and stop, not throwing (many) other codes that might cause other issues (don't have the ability that I know of to read the actual stream, so order might the reason I see a couple of other codes that seem to be effect).
Personally, what I am seeing out of this project is the ability to:
1. mask systems taken offline.
2. speed signal generation.
Sorry that I am no programmer... but I can kang your work all day long if it's open source and has a good start. Maybe in the end, I could even get something up to actually contribute (but no promises any work I did wouldn't make a real nerd cry). 2. speed signal generation.
01-05-2014, 02:16 PM
#22
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Huh! I did not even know mine JK had an amp, I had to check 
So yeah, not only does it have the CAN-IHS bus on its connector, it is in a much easier location to tap into than the radio. That'll be a much better place to junction into than behind the radio.
I'll pull out the amp and radio later tonight and see what messages can I get from each of them in isolation.
So yeah, not only does it have the CAN-IHS bus on its connector, it is in a much easier location to tap into than the radio. That'll be a much better place to junction into than behind the radio.
I'll pull out the amp and radio later tonight and see what messages can I get from each of them in isolation.
01-05-2014, 02:28 PM
#23
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And now that I know the amplifier harness has the CAN-IHS bus that'll be a great place, too. It's the same kind of 22-pin connector but with more wires, but in a much easier place to access.
01-06-2014, 11:50 AM
#24
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This is interesting. If you play music from the USB source (ala iPhone), then it (whatever it is) blasts message id $3ac out on the bus and the radio will display that on its information display.
Code:
(1389040747.468564) vcan0 3AC [8] 0B 01 20 20 20 20 20 20 '.. ' (1389040747.497350) vcan0 3AC [8] 1B 03 20 4E 6F 20 49 6E '.. No In' (1389040747.528932) vcan0 3AC [8] 03 03 66 6F 20 20 20 20 '..fo ' (1389040747.564518) vcan0 3AC [8] 3B 04 20 47 69 76 69 6E ';. Givin' (1389040747.597491) vcan0 3AC [8] 23 04 27 20 59 6F 75 72 '#.' Your' (1389040747.633804) vcan0 3AC [8] 13 04 73 65 6C 66 20 41 '..self A' (1389040747.667984) vcan0 3AC [8] 03 04 77 61 79 20 20 20 '..way ' (1389040747.700881) vcan0 3AC [8] 0B 05 20 52 61 74 74 20 '.. Ratt ' (1389040747.736770) vcan0 3AC [8] 1B 06 20 44 65 74 6F 6E '.. Deton' (1389040747.760179) vcan0 3AC [8] 03 06 61 74 6F 72 20 20 '..ator ' (1389040747.794957) vcan0 3AC [8] 1B 07 20 4E 6F 20 49 6E '.. No In' (1389040747.826042) vcan0 3AC [8] 03 07 66 6F 20 20 20 20 '..fo ' (1389040747.855264) vcan0 3AC [8] 3B 08 20 47 69 76 69 6E ';. Givin' (1389040747.887166) vcan0 3AC [8] 23 08 27 20 59 6F 75 72 '#.' Your' (1389040747.923526) vcan0 3AC [8] 13 08 73 65 6C 66 20 41 '..self A' (1389040747.949203) vcan0 3AC [8] 03 08 77 61 79 20 20 20 '..way ' (1389040747.986814) vcan0 3AC [8] 0B 01 20 20 20 20 20 20 '.. '
01-07-2014, 10:02 AM
#26
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For reference: Mopar Connection Repair Kit and 1438759-1 Product Details - TE
I actually bought some aftermarket radio repair harnesses off eBay to get that connector/receptacle cheap, though. TE doesn't make a receptacle mate for that connector that isn't part of a PCB mount solution.
01-07-2014, 10:04 AM
#27
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Yeah - when I first wrote that I was assuming the radio was sending out the messages, but later realized it's the UConnect module that's sending them to the radio itself.
You can blast out your own versions of those messages over the bus and the radio will happily display them. Another fun option.
You can blast out your own versions of those messages over the bus and the radio will happily display them. Another fun option.
