Questions tagged [obd]
OBD means "On-Board-Diagnostics" for motor vehicles. Originally proprietary, there are now standards such as OBD-II and EOBD which define the connectors, electrical signalling systems and a standard set of messages.
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What do chips like ELM327 and STN1110 do?
What problems are the chips ELM327 and STN1110 solving?
If I connect the necessary interface ICs (I mean dumb ICs, like level shifters, inverters, etc., not pre-programmed devices like ELM327) ...
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Reading from CAN bus of a Chevrolet Cruze using an Arduino Uno
I'm using the Arduino Uno, CAN bus shield, and OBDII to DB9 Cable using their provided libraries. I was only able to initialize it.
Readings:
While connected to the car:
CAN-High: 2.7 V - 3.0&...
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Reading and writing CAN messages through ELM327
I have an OBD-II cable, and an UART-to-OBD-II board which has the ELM327 IC in it. I want to communicate with my ECU by sending-receiving CAN messages. Is it possible to communicate through ELM 327?
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Purpose of Zener Diode in Circuit
Can anyone please explain what the purpose of the zener diode is in the circuit shown? The circuit is taken from Figure 3 in the datasheet for the STN1170, an OBDII interpreter IC.
simulate this ...
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USB to OBD-II Converter
I want to make a scan-tool that works via a PC for my Thesis. To test it I have bought an ECU simulator (ECU-Sim 2000) with a CAN bus.
I'm planning to make it using an FT232H USB to serial chip and a ...
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Circuits newb needs someone to help with a diagram
I'm trying to build an OBDII circuit for a STN1110 chip from OBD Solutions. My problem is I don't understand some of the values needed. For instance, the datasheet has most of the information I need, ...
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Multiple devices on a CAN bus via the OBDII diagnostic connector in car
We have an aftermarket cruise control installed (in Suzuki Swift), which is connected to the OBD-II connector to access the CAN bus (according to the installation manual, it uses just CAN-L and CAN-H ...
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CAN bus terminal
I have a CAN bus network that I want to test. I want to send CAN messages over my computer and see the responses. I have a Microchip kit with CAN that sends the responses over USB Mini and can be read ...
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How do I interface with OBD-II?
I've been tasked with interfacing with the on-board diagnostics of a vehicle.
Some systems use 7V signalling, some use 5V signalling, some signal up to the battery voltage (which can be as high as ...
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