OBD-2/EOBD
multi-protocol interface 'ELMScan 5' is the latest PC-based scan tool from
ScanTool.net. Not only the interface is contained, but also industrially manufactured
cable (serial to the computer and OBD-2/EOBD to the vehicle).
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The microcontroller "ELM327 v1.3" from ELM Electronics is the newest addition to the OBD
family, providing CAN (ISO 15765-4) support, as well as SAE J1850 PWM, SAE J1850
VPW, ISO 9141-2 and ISO 14230-4. ELM Electronics actually taken the best of
the ELM320, the ELM322, and the ELM323, improved on them and then added four
CAN protocols.
Just as with the other ICs, the Microcontroller "ELM327" transparently
converts OBDII data into standard ASCII characters, allowing trouble codes and
operating parameters to be easily retrieved without the need for special software.
No knowledge of data formatting, error checking, bus initiation etc. is needed
either, as the "ELM327" from ELM Electronics handles all of it
for you. You don't even need to know what protocol your car 'speaks', as this
IC automatically detects that for you, too.
In addition to the protocols, we think that you will also enjoy some of the
enhancements. For example, the RS232 interface has been completely updated.
It is now a background task so it doesn't interfere with OBD receives, it has
a large data buffer to allow for fluctuations in the OBD data, and it offers
a second baud rate (115.200).
There are many other features (like a battery monitoring input) that you will
only learn about
if you download either the (6 pages) ' Quick-Sheet
' or the full (59 pages) ' Data-Sheet '.
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ISO (ISO9141-2) |
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CAN-Bus (ISO15765-4)
11Bit / 29Bit / 250kBaud / 500kBaud |
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KWP2000 (ISO14230-4)
Fast & Slow |
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PWM (SAE J1850) |
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CAN-Bus LowLevel
(''LAWICEL'' Modus) |
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VPWM (SAE J1850)
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K/L and KK/L
(for using VAG.com and other Software) |
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Features of the "ELM 327 v1.3" from ELM Electronics:
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Standard
ascii characters used for all commands and responses |
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User
settable CAN mask and filter values |
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Up to 115.200 baud for communication |
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Ability
to bypass the initiation process and force a protocol to become active |
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Ability
to close a protocol at any time |
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Hardware
handshaking signals to simplify computer interfaces |
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Ability
to manually select any of the supported protocols |
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Last
successfully initiated protocol can be automatically stored in EEPROM |
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Voltage
input allows monitoring of the vehicles charging system |
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Voltage
input is easily field calibrated |
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Brownout
protection protects against problems from low voltages |
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Responses
can be factory programmed for other languages |
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Special
@1 string allows unique identifiers for larger Customers |
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Standard
RS232 pin polarities, Buffered
RS232 sending (256 byte) |
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Busy
output, RTS input for RS232 handshaking |
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Can
send 8 byte OBD messages |
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Schmitt
trigger OBD inputs simplify interface in a noisy environment |
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Buffer
Dump command displays OBD messages as sent or received |
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ISO
9141/14230 wakeup string (idle message) is fully programmable |
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Warm
Start command provides a quick system reset alternative |
(*) Although with most modern SMD technology manufactured, the ELM IC is exchangeably. So he can be exchanged at any time comfortably. Consider this with the comparison with other offerers.
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| Diagnostic-Interface |
CD-ROM |
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| OBD-2
Cable |
RS232 Cable |
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