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There is a distinction that needs to be made between: OBD: this is an interface, that specifies the physical and electrical parameters required to connect a diagnostic computer and the car's electronics in a standard way. This is the bit that is mandatory by legal requirement, so that a car manufacturer cannot "lock in" its vehicles by requiring service to ...


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Cause Your car (like most cars) saves the milage in a small memory chip inside the instrument cluster. That chip is called an EEPROM. Like most memory units EEPROMs are subject to wear. If you rewrite the data often enough the chip will fail to save the new data or save corrupted data. This could be the case here. So, why is the "correct" (i.e. new) value ...


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OBD is a standard for a diagnostics port that provides emissions-related info on the diagnostics port. Contrary to popular belief its purpose isn't to prevent lock-in by car manufacturers but only to allow service centers a standard way to access emissions-related info required for mandatory checks like the "MOT test" (as they call it in the UK). The ...


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The two requirements are separate. OBDII is required in all vehicles since 1996. This is primarily an emissions related regulation to formalize how vehicles would relay emissions failures to the user and to mechanics. The standard has many parts, but it primarily designated a connector, its pinout, and allowed one of five different electrical signalling ...


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How is the OBD and CAN exactly related? Controller Area Network (CAN) is ISO 11898 standard. It, like most other networks, is based off of the OSI model. It specifies certain parameters for communications between vehicle systems. CAN was first specified in 1986 by Robert Bosch at the Society of Automotive Engineers (SAE) congress. CAN uses serial ...


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I don't think CAN is a necessary part of OBD, it's just the most commonly used system. The OBD requirements are for consistent diagnostics (so that, in theory, any car can be plugged into a standard reader and give a standard set of error codes), wheras CAN is a method for the internal components of the car to communicate (similar in many ways to the USB ...


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None of this is true. In the same way as there was an EU Directive that all cars be equipped with ABS but TVR didn't subscribe to this. My uncle has just sold a 2005 Caterham Se7en CSR-200 which used MBE management and was definitely not CAN-BUS. We're building another one in October of this year and if it genuinely is CAN-BUS I'll let you know but I have ...


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For what it's worth, there is a way to access the instantaneous fuel flow rate inside the secret menu on this model. I know this is not exactly what you're after but this parameter has a very fast refresh rate, and to obtain the l/100 km reading it you simply have to divide the value by vehicle speed and adjust for units if needed. With the key in the "off" ...


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No car has every attribute to be fully autonomous out of the box. Brakes: If a vehicle is equipped with dynamic stability control then software control of the brakes is possible. Dynamic stability control incorporates all the needed pieces to operate the brakes without driver input. The base software will not incorporate software brake control and will ...


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I recommend my combo, the app Torque Pro for display on a Bluetooth enabled phone or tablet, and a Bluetooth ODBII Reader like my BAFX Elm327 to get the data. Torque Pro has configurable on-screen real-time gauges. The data it can display is only limited by your vehicle's ODBII implementation.


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Why use a the Canbus to USB adaptor (not a cable!) ? The elm327 comes in at least three flavours: One with an USB connection. One with an bluetooth connection. One with an Wifi connection. I just ordered the third because it uses ancient but widespread IP v4 to set up a connection, making it usuable with almost any computer. (Almost since it might be ...


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It should be under the dash just to the right of the hood release (based on some internet searching). EDIT: The connector itself should look like this: Most GM vehicles have it just beyond the dash plastic underneath. Since this is a Caddie, it may be under a panel. This video may be of a little help to you.


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As far as I know, this isn't possible. The EEC-IV has a stored code memory that keeps track of engine problems while it is running but requires you to turn on the diagnostic mode to get those codes. There is also a Key-Off-Engine-Running diagnostic mode that requires you to perform some specific steps while the car is parked and warmed up to diagnose ...



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