Questions tagged [can-bus]

CAN (Controller Area Network) bus (internal vehicle communications network) is a message-based protocol, designed originally for automotive applications, but can now be found in aerospace and maritime as well. This is a standard which allows different parts within a vehicle to communicate with each other without the use of a host computer.

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Difference between FMS and OBD

What is the difference between FMS and OBD. Whether OBD is a standard or protocol. Recently I am working on a GPS device to tap the CAN bus in order to integrate with our fleet management system. In ...
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582 views

CAN BUS Renault

I am in the porcess of building an application which reads live telemetry data from the inbuilt car computer and sends it to Google Firebase for analysis and informational lookup on your phone and ...
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2k views

BMW CAN bus data format

https://www.reddit.com/r/CANBus/comments/39pzpp/bmw_3series_2015_odometer_reading/ I am using the above website as reference and sending commands to engine ECU. I have a log from BMW engine ECU (below)...
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U0100 Toyota Aygo CAN Stop Communication or DTC Diagnostics, which is right?

I spent a lot of time trying to resolve some problems with a 2006 Toyota Aygo. The most important or significant code it has is U0100: No communication with ECM/PCM A. Information for 1KR-FE engine, ...
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CAN Bus Off DTCs and Parasitic Draw

Working on my 2010 Fiat Ducato 250 series. I have a parasitic draw of around 200ma. There are two codes which won't go away, U1602 CAN Line, Bus Off Intermittent in the Marelli Instrument Cluster, ...
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2009 Volkswagen Jetta TDI diesel 2.0L

I have 2009 Volkswagen Jetta TDI diesel 2.0L, they saying this car required CAN bus system instead kwp2000. My question is: How does the protocol Id change? Maybe ECU is defective? Some people told me ...
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P0101 and P2113 codes removal Kia Rio 2011

I have a KIA Rio Diesel car from 2011. With a diagnostic tool I have read the P0101 and P2113 DTC's: I had an old and problematic throttle body. I have replaced it with a completely new one and took ...
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127 views

Mapping VW DTCs from a scantool to the raw data obtained

I scanned a VW Golf TDI 2015 using a scantool (at a workshop) and it gave the following 2 codes - Engine module: P0103 - Mass Air Flow (MAF) (G70): Signal too High Instrument cluster module: ...
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Where are the Logics and Data of the OBD System Stored?

I'm wondering if OBD Data is stored and processed on it's own board or integrated into other systems, or both. Or neither. Wikipedia just confused me further. What I got out of the wiki is that OBD ...
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34 views

Car remote starters on push to start cars

I have a few questions about installing remote starter kits and other aftermarket alarm systems on cars that are push to start(Smart key fob no keys). If the car doesn't start unless you have the key ...
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Truck fleet monitoring project

I need to design a truck fleet monitoring system and make a prototype of it during my traineeship this year. I've been looking into the different buse networks that are already implemented in trucks ...
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1answer
981 views

VAG TP 2.0 complete list of AT commands

I am trying to find DTCs from various ECUs in a Skoda Rapid 2009 model. I am using OBDLink SX (elm 327 chip) and Putty (similar to HyperTerminal) https://jazdw.net/tp20 This link gives the list of ...
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Logging CAN bus data using Macchina P1 UTD

I recently purchased P1 UTD by Macchina and I have been struggling to get it to work for the past week. I followed all the documentation provided. I connected it to the internet, did the updates and ...
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CANbus port won't respond to OBD 0x7DF requests on 2009 Honda Pilot, how come?

CANbus reader: Kvaser leaf light V2 Kvaser leaf HS Vehicle: 2009 Honda Pilot Software: Kvaser CanKing installed on Windows 10 Issue: While the engine is running, CanKing could catch all CANbus ...
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Volvo - send commands to read DTCs

I tried finding out the commands a diagnostic tool sends to my Volvo and I got this - 1D D0 16 16 03 22 F1 86 Protocol - CAN 29/500 (elm command: AT SP 7) Can someone help me with the method to ...
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using OBDII with can-utils Ubuntu

i'm trying to figure out a way to communicate with my OBDII using can-util lib but i'm facing lots of issues my question is "is what i'm trying to do possible" if so why when i connect my OBDII the ...
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Getting secondry can bus data via PRIMARY can bus

I want to get the data of the middle or lower can bus that is connected to BCM (body control management) via the high baud can bus -that is connected to the Obd port. Does someone has did it? What ...
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Interfacing with CAN bus

I am looking to write an application in C# and use both ARM based computers and x86 based computers. My question here is when using a J1939 to DB9 cable, do I need a specialized interface for the CAN ...
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Understanding the CAN Bus

I am looking to write an application that works with the J1939 protocol which is part of CAN (Controller Area Network) for vehicle engines. I am reading on this but I am getting some conflicting ...
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103 views

Is there a way to transmit a CAN bus signal over a high current DC line?

I would like to use a high current cable with batt + and chassis ground from the vehicle to the trailer, and also use the same cable to transmit a CAN bus signal to the trailer. Is there a way to get ...
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Truck's exhaust temperature: how to read EGT sensor by ODB / FMS / Can-bus?

I succesfully decoded can-bus data from a VW Caddy, but know nothing about OBD and trucks. For a research I need now to read a truck's exhaust temperature (EGT sensor), possibly by OBD. I would ...