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39

Ok, before I will answer your specific questions, let's do some introduction on bus systems. It could be that you know parts of these things, but I will start here as people with little or no IT or electronics knowledge should be able to understand this as well. Bus Systems In electronic systems signals are sent from one chip to another using wires (let's ...


20

It is highly probable that the reason your car was reluctant to start was that the time you were running diagnostics had sapped some of the charge from the battery. The battery on the car will not charge unless the engine is running. It is unlikely that this device would harm your vehicle but it is theoretically (and practically) possible to do temporary ...


18

Ultimately the answer is yes you can. To qualify this answer, though, you can only control some things, but not all things, then only on some vehicles. You can do simple things through the port, such as turn the A/C pump on, or any other thing which is controlled by the computer (PCM). As an extension, I'm sure you could rev the engine using the same methods ...


11

The PIN code is 6789 (instead of 0000 or 1234).


11

You're glossing over how the hack actually happens. The hack involves erasing the old keys and then reprogramming a new key to the vehicle. If the car uses a smart key then you're in right away. If the car has a physical key, then having the correct cut of key is also required. Cars also fall into two categories. The first is the real expensive cars that ...


11

The computers in a car are constantly monitoring the operating conditions and sensors that are in the car. When a test fails or something goes out of a pre specified range a DTC is set. The biggest misconception about a DTC is that it tells you what to replace, it does not. A DTC tells you what test failed or what parameter went out of range. This ...


10

It seems that the correct code was already one of the listed ones, still there is a trick: it seems you are able to put the PIN code only one minute after the device was powered.


10

Some motorcycles have a CAN BUS, some don't The OBDII connector type is simply a standard instituted by the SAE (Society of Automotive Engineers). In 1996 the US government mandated that all cars sold in the United States conform to the SAE OBDII standards. They didn't specify motorcycles. As result, a myriad of on-board diagnostic methods were ...


10

On a car with fuel injection there can be two fuel pumps, one high-pressure and one low-pressure. The low-pressure pump moves the gas from the tank up to the high pressure pump. The high pressure pump then raises the pressure to a level that will be useful to the injectors. The two PIDs reflect those two different systems. PID Description Min ...


9

I am not sure of your exact solution, but Brian Blum of Texas Instruments says the amperage draw depends on what state the device is in, of which there are seven states. According to the document in the link, it draws as follows: State 1 (wake-up) - 6.1mA State 2 (pre-processing) - 8.1 mA State 3 (pre-RX) - 12.3 mA State 4 (RX) - 22.3 mA State 5 (Rx-to-Tx) -...


9

To my knowledge there is no way a scanner can cause issues with your computer electronics. This device is a read only device. It doesn't change anything in your computer. It does, however, communicate with the computer. Through this communication it can give the computer commands, such as to clear the codes. This doesn't write anything to the computer, but ...


9

Everything depends on if the manufacturer multiplexed the windows or not. For example, General Motors tends to multiplex their windows. This means that every door has a module inside it. The module controls the window, door lock, power mirror, etc... and takes inputs from door lock and window switches. The only thing to pass through the door jam is power ...


9

Everything depends on exactly what your looking for. If engine running/not running is sufficient then check the RPM. If RPM is non zero, the engine is running. If the RPM is zero or no communication then the engine is not running. This can be easily done in the OBD stream. If you want anything more than that you need manufacturer specific and then not ...


9

OBD II is a US government mandated diagnostic interface. This interface is guaranteed to provide a specific set of information including but not limited to engine computer data and engine computer trouble codes. When OBD II was rolled out the US government did not force the manufacturers to also standardize the communication interface to the engine ...


9

It really depends on the implementation of OBD2. What my 1997 Subaru logs (virtually nothing) compared to a 2015 Chevy Cruise are entirely different things. However, in most cases, a Diagnostic Trouble Code (DTC) is logged with a freeze frame, which is a complete store of all Parameter ID's (PIDS). These parameters cover everything from RPM, vehicle speed,...


8

Looks like the issue is with the incoming signal. Unless your vehicle comes equipped with a flux capacitor, 65 V across battery is a bit too much. Even heavy trucks don't run that voltage to my knowledge. 65535 is the max unsigned 16-bit integer. Looking at the OBD-II wiki page it looks like the formula used by the OBD-II PID as per SAE J1979 is: ( A * ...


8

Did you set the protocol for the chip to monitor on? e.g. ATSP5 for KWP-2000 or ATSP0 for "best guess". What about checking the headers as well - ATH1? I use the following string of commands to monitor my full KWP bus, which is obviously different from CAN, but is similar enough that it might be of use: ATI -- check connection from app to scan tool ATH1 --...


8

The ELM327 is (almost?) as powerful as any other diagnostics solution. That's simply because it only translates the low level OBD protocols to some other format. Bluetooth connections on mobile phones seem to be flaky on many devices. Usually, this shows as established connections suddenly failing during transfer. Restarting the app, and/or turning the phone'...


8

Maybe not answering your question completely, but: some people doubt how the OBD II connector is connected to power. The specification (SAE J1962 specification) of the connector is quite clear on this: 5.3.9 (...) Vehicle connector terminal 16 is designated Unswitched Vehicle Battery Positive and must be implemented in the vehicle connector. This terminal ...


7

Pin 16 on the ODB-II connector is specified as "Battery Power" or "Battery Positive". There will always be 12v power between pin 4 and 16. Note that pin 5 has "ground" in the description, but that is just for the communication signalling and not for power. The connector will always have power on these two pins regardless of the key position, and when you ...


7

Modern gasoline engines have sensors to measure the amount of air that enters the engine. The ECU then injects fuel to give the correct mixture to get the most efficient burn. A dirty air filter will first show itself by limiting the flow of air at high throttle positions. Rather than causing a rich mixture however, the ECU will see the low air flow and ...


7

try this AT H1 this will turn on headers, then do 0100 you will get something like 7E8 06 41 00 BE 3E A8 13 7E9 06 41 00 98 18 80 13 which says you are getting results from ECUs 7E8 (engine) and 7E9 (transmission)if you are running on an 11bit CAN. If you get 18 DA F1 18 06 41 00 88 18 00 13 18 DA F1 10 06 41 00 BE 5F A8 13 then its results from ...


7

The short answer is: no - not without the manufacturer's diagnostic tools. The long answer is: maybe. Modern cars have most (if not all) exterior and interior lights controlled by the body control module (BCM). Most (if not all) switches are connected to the BCM as well. This provides a lot of flexibility. A prime example is if you leave your headlights ...


7

If the question emphasis is on cheap, weight reduction is your friend For many reasons: A lighter car accelerates more quickly Because physics. Since you're planning to drag race, top speed should be less of a concern here. It costs nothing except time and effort Plus it'll help you get familiar with how the car is bolted together There's a chance you ...


6

ELM documentation indicates that this is not a query-only problem. I see on page 31 of that document that the issue was that of the rate at which J1850 requests arrive at the OBD system (this is a consequence of the April 2002 update of the J1979 standard). Specifically, they warn you against querying at rates higher than 100 milliseconds (also known as 10 ...


6

since installing new 02 sensor engine light has not reappeared after clearing w/obd2 device and torque free app. TOTAL COST= ~$27 7 31 13 ordered Koolertron F-12 ELM 327 OBDII PC Car Diagnostic Scanner Electronics EggDeal via amazon $9.50 to use w/android smartphone torque free app to read & clear obd codes 8 10 12 friend sprayed hoses he knew to be ...


6

Pending code? The user manual for your device says it should say "PD" for pending codes, so maybe not. "P0130 P" isn't a valid DTC for your vehicle so pending code is really all that makes sense. More specific to your model P0130 is front oxygen sensor circuit range/performance problem (Lean) Possible causes: Open wire to O2 Sensor Short to ground in O2 ...


6

There are 6 pins in the OBD-II connector which the manufacturers can use at their discretion. In modern vehicles there are usually 2 or more communication buses. Only one bus is for engine and emissions, which is connected to the standard diagnostic pins on the OBD-II connector. The manufacturer typically connects another bus to the OBD-II connector with ...


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