Home > Technical (L322) > What does 50-CAN DEFECT mean ? Air Suspension Fault |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
CAN - Controller Area Network
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28th May 2011 9:17pm |
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swast4 Member Since: 07 Jan 2011 Location: Wirral Posts: 69 |
It is pretty difficult to take out, what is can bus ? |
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29th May 2011 2:04am |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
CAN stands for Control Area Network. It is a form of multiplexed wiring designed by Bosch and allows the linking of a number of control systems together, normally in a vehicle, so that they can share information. In the past it would have been necessary to have at least one wire for every signal on a vehicle making wiring looms bulky and expensive. CAN bus multiplexing allows a large number of signals to be transferred digitally using only a pair of twisted wires.
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29th May 2011 8:31am |
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SteveMFr Site Sponsor Member Since: 22 Nov 2009 Location: Strasbourg, France Posts: 1641 |
The EASC is inactive and more or less just along for the ride when it has not been activated (and activating the EASC requires having the vehicle in park with the motor running and pressing the 'resume' button on the cruise control 10 sec.). It is highly improbable that the EASC is sending erroneous signals - and that these signals are disturbing only the EAS ECU (and not one of the many other items on the CAN). That said, Dan is right. Something is likely disturbing comms between the EAS ECU and the CAN. How did you connect the EASC's wiring to the original harness? Did you clip the original CAN wires and reconnect them with the EASC harness' wires? Can you recheck the connections and the insulation at your connections? This is why the instructions with the EASC recommend stripping a section in the middle of the wire without clipping through it and attaching the EASC wires to the stripped section. See pics below for my method of connection. Unplugging the EASC as Dan suggested will give you 100% assurance that this is not the cause of your probs, but my money is on a bad connection (or, possibly, an unrelated issue). I've passed your post on to Christian from GAP Diagnostic. He'll either post his ideas here directly or pass the info back to me and I'll post. Here is how I connected my EASC. The problem is, soldering is not really recommended for use in automotive applications (for various reasons). The crimp connectors I used are available as 'C' connectors but as I didn't have these I used regular crimp-on terminal ends and clipped off the terminal. Connecting power and ground. You can see the brown ground stripped w/o being clipped and the thick red (OEM) wire with the thin red (EASC) wire crimped on. Connections are staggered to eliminate any possibility of a short circuit. You will need proper crimping pliers for uninsulated terminals to do this. Individually insulated: And the harness closed back up and ready to be plugged in (disconnect battery before unplugging the ECU and follow the battery disconnection procedure in the RAVE!): Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated RRC 2Dr, RRC 4Dr, P38, and 2 L322s (wife thinks I'm nuts - prob right, too) |
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29th May 2011 11:07am |
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swast4 Member Since: 07 Jan 2011 Location: Wirral Posts: 69 |
Thanks Steve and Dan for your replies, I have a better understanding of the system now, yet another complexity to the modern vehicle.
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29th May 2011 11:57pm |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
lol, that's only the can-bus! There is still the K-Bus and the i-Bus yet! |
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30th May 2011 9:07am |
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