This integrated circuit requires a Vdd supply of 4.2V to 5.5V. The most recent version (firmware v2.3) adds new C0/C1, IA and FT commands, has updated Response Pending logic for use with CAN Extended Addressing, and adds new Flow Control modes. The latest ELM327 is available in two voltage ranges: In addition, the IC supports various other protocols to varying degrees (SAE J1939, CAN at programmable rates up to 500kbps, ISO 9141 and ISO 14230 at 96 bps, etc.) All versions of the ELM327 support the standard OBDII protocols: We have updated the product several times in response to your requests, and as a result have produced many versions of the IC over the years. Although these protocols are being phased out (they’re being replaced by SAE J1939), there are still a very large number of vehicles that use them.Įlm Electronics has been producing the multi-protocol ELM327 integrated circuit since 2005. This protocol converter integrated circuit is for use with heavy duty vehicles that use the SAE J1708 standard with J1587 or J1922. You may wish to also consider the ELM327, as it offers several options for customizing the timing etc. The ELM323 supports the ISO 9141-2 and ISO 14230-4 standards that are used by many vehicles throughout the world. This standard was typically used in General Motors and some Chrysler vehicles.ĮLM323 – OBD (ISO) to RS232 Interpreter (v2.0)
Similar to the ELM320, the ELM322 is for connecting to an OBDII equipped vehicle which uses the 10.4KHz SAE J1850 VPW format. The ELM320 supports the 41.6KHz SAE J1850 PWM protocol, which was commonly used in many Ford Motor Company vehicles (but has now generally been replaced by CAN).ĮLM322 – OBD (VPW) to RS232 Interpreter (v2.0) OBD Interpreter ICsĮLM320 – OBD (PWM) to RS232 Interpreter (v2.0) Note that we have also included a couple of non-OBDII protocols that we are often asked about.
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