Help needed with rp lab ecu
19-02-2009, 09:59 AM
#1
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Help needed with rp lab ecu
Hi i have set my saph up on rp lab
and when i try to read the ecu i get a pop up on the laptop saying
check connections and weather ECU is powered up. The fuel pump runs so i asume its powered.And im pluged into pins 8 27 and 11
My question is are these the corect pin numbers and also are they the same as on the diagostic plug
any help would be much appreciated
and when i try to read the ecu i get a pop up on the laptop saying
check connections and weather ECU is powered up. The fuel pump runs so i asume its powered.And im pluged into pins 8 27 and 11
My question is are these the corect pin numbers and also are they the same as on the diagostic plug
any help would be much appreciated
19-02-2009, 10:29 AM
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Yeah just sent an email to ernest
do you know if the diagnostic plug are pins 8 27 and 11 it would make it much easier to plug into that
do you know if the diagnostic plug are pins 8 27 and 11 it would make it much easier to plug into that
19-02-2009, 10:53 AM
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Testing the future
i think that it will be the same lead that simon is talking about making to go with his monitor software - something that changes the voltage levels at the ecu to those needed by the serial port
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19-02-2009, 12:23 PM
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For the techies...
The ecu voltage levels are at 12 volts with open collector output and a CMOS gated input with a pull up resistor to 12 volts.
RS232 is specced at +/-12 volts but most PC's use anything from +/-5 upwards.
So you do need some interface electronics.
Also, another issue with leads is the relative ground voltage levels between the computer, ecu and vehicle earth.
This needs to be taken into account or you wil get unreliable communication or in worst cases a fire.. !!!!
You can easily make a lead but I am unable to publish a diagram here due to the unique way this site is now funded..LOL
I hope this isnt taken as a trade advert because I am not selling anyting..LOL
The ecu voltage levels are at 12 volts with open collector output and a CMOS gated input with a pull up resistor to 12 volts.
RS232 is specced at +/-12 volts but most PC's use anything from +/-5 upwards.
So you do need some interface electronics.
Also, another issue with leads is the relative ground voltage levels between the computer, ecu and vehicle earth.
This needs to be taken into account or you wil get unreliable communication or in worst cases a fire.. !!!!
You can easily make a lead but I am unable to publish a diagram here due to the unique way this site is now funded..LOL
I hope this isnt taken as a trade advert because I am not selling anyting..LOL
Last edited by ECU Monitor Enthusiast; 19-02-2009 at 12:37 PM.
19-02-2009, 12:37 PM
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Forgot to say...
Most USB to serial converters will never work as they are just total shit as the ECU uses a non standard BAUD rate !!!!!!!
In fact RP LABS do not recomend using these. ! (It is on their web site)
Most USB to serial converters will never work as they are just total shit as the ECU uses a non standard BAUD rate !!!!!!!
In fact RP LABS do not recomend using these. ! (It is on their web site)
Last edited by ECU Monitor Enthusiast; 19-02-2009 at 12:39 PM.
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