#ALDL ADAPTER TO OBD2 SERIAL CABLE SERIAL#
#ALDL ADAPTER TO OBD2 SERIAL CABLE SOFTWARE#
#ALDL ADAPTER TO OBD2 SERIAL CABLE PC#

The car wants a TTL voltage signal (0 or 5 volts) to reprsent the 0's and 1's. RS232 kicks out a + or - voltage signal (roughly 3 to 15 volts) to represent the 0's and 1's. so I could be wrong on some of this stuff ) Дid some more reading about TTL, RS232, the Max232 chip etc. Maybe Paul or someone else might be able to help clarify. Is it blind hope that the PCMCIA type design is better than the USB ones?

#ALDL ADAPTER TO OBD2 SERIAL CABLE SERIAL#

I did see someone mention that they were having luck with megasquirts using this PCMCIA to serial adapter: This brings me to my question of which USB adapter have people had better luck with? I hate to have to keep trying / returning until I find one that works with my laptop. Thus, I am pretty positive it is the USB adapter (already verified COM settings and ports were setup correctly). And yes, this is the same cable, same car, same PCM that everything worked with before. If it does then you can be pretty confident that the Serial-USB converter is not generating the correct baud rate.Д«ut right now, that just isn't an option for me any more (my old laptop was 8+ years old ).ДЄnyway, found a Prolific USB to serial adapter, and performing the TTS test, shows that the speed is off. I recommend using a real serial port, you may need to get your desktop computer (if it has a serial port) close to your vehicle to test whether the cable works using a real serial port.

#ALDL ADAPTER TO OBD2 SERIAL CABLE PC#

A Real PC UART chip controlling a real RS232 serial port is capable of generating a baud rate of 8228 which is close enough to 8192 to allow it to work. 'Most USB-Serial adapters are not capable of generating the correct baud rate required for ALDL communications. I know Paul has said get a real serial port (found on another post about getting a cable to work ( ) It is capable of communicating over all of these OBD2 protocols, and using one of the many diagnostic softwares available allows the backyard mechanic grab diagnose any engine related problems.Just upgraded laptops and have finally had to deal with the dreaded USB to serial adapter woes. The most common scantool for this job is the ELM327 cable as pictured to the right. OBD2 Cables main use is for looking up diagnostic trouble codes,history fault information and also viewing live engine data. So technically, ALDL, VPW and CAN are all different protocols, that speak different languages and all have there specific functions. This means theres a whole heap of available information,software and knowledge on the web as this standardized protocol is widely used,reversed and developed around the world.В Looking specifically at the commodores, the OBD2 protocols that GM uses is VPW and CAN protocols.

All models and manufactures must meet the bare minimum criteria which includes looking up fault data, engine data and other diagnostic information. OBD2 has a major difference in the interpreting of this data compared to ALDL, its all standardized therefore it is very simple to understand. But in fact, theres a whole heap of OBD2 lanaguages, think of it as being able to speak English with a different accent, it sounds similar but isnt quite the same. OBD2 is the вЂњGenericвЂќ name for this communication language.

#ALDL ADAPTER TO OBD2 SERIAL CABLE SOFTWARE#

So why is this important? Imagine 20 people all trying to speak at once, it would feel pretty crowded and вЂњnoiseyвЂќ wouldnt it? Meaning that alot of information is being passed all time so any software developed for ALDL cables needs to be efficient and effective to be able to keep up the the busy line! This information is sent out in an orderly fashion that all the cars electronics can see, It is mainly directed at the BCM (Body Control Module) since it is the BUS master which looks for all the other modules signals to ensure all components are working correctly.Д®nough about the modules, looking more into the inner workings of an ALDL Cable, the information obtained from the car is fed directly through the ALDL cables chip and the raw data is passed onto the computer. Specifically looking at Holden Commodores, VR to VZ Commodores use this Protocol to communicate been majority of the cars electronics to pass important information and statusвЂ™s ranging from seat-belt status all the way to airbag deployment. This protocol isвЂќnon standardizedвЂќ meaning GM implementedВ a communication protocol that is not be exactly the same as any other vehicle let alone any other manufactures. Starting with ALDL cables (Also know as OBD1 or GM OBD), these types of cables communicate over a very basic protocol.

Aldl adapter to obd2 serial cable