Caterham OBD or Can
Caterham OBD or Can
Question is the ecu diagnostic plug on the Caterham K series a Can or OBD type plug ?
Regards
Tboner
Tboner
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- Posts: 133
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Re
Charles i did try to call you to ask the question thought you may know
Damn thought it would solve a lot of issues with wiring up using the new adapter they have now issued oh well looks like stick with the dl1 and dash 3 till the closed season then.
Cheers
Paul
Damn thought it would solve a lot of issues with wiring up using the new adapter they have now issued oh well looks like stick with the dl1 and dash 3 till the closed season then.
Cheers
Paul
Regards
Tboner
Tboner
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- Posts: 133
- Joined: Mon Mar 26, 2007 8:22 pm
Re
really looks like the £150 cable is not worth the money to save the time involved in wiring up 2-3 items
Mind you i wonder if the port logs lamda sensor and fuel pressure or even throttle position sensor which you could use for diagnostic off the data logger for fault finding ?
Mind you i wonder if the port logs lamda sensor and fuel pressure or even throttle position sensor which you could use for diagnostic off the data logger for fault finding ?
Regards
Tboner
Tboner
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- Posts: 133
- Joined: Mon Mar 26, 2007 8:22 pm
It does output lambda voltage - but on a narrow band lambda it is oscillating between two voltages quickly and, to be honest, too quickly for the OBD data rate. Also the lambda isn't really used when the throttle is wide open!
Fuel pressure - no
TPS - yes; probably the most worthwhile, although data rate may still be an issue.
Just to be clear, OBD doesn't 'log' anything, you can just read it in 'real time' from the port.
Fuel pressure - no
TPS - yes; probably the most worthwhile, although data rate may still be an issue.
Just to be clear, OBD doesn't 'log' anything, you can just read it in 'real time' from the port.
Re
yes real time off the port to the DL1 was the idea for data use but would have been nice to get RPM from it for both the data logger and the dash3 shift lights, the dash3 i just wanted for accurate lap and sector times with predictive in real time , along with shift lights.
Are you running the firware on your DL2 dash with predictive lap times ETC ?
Are you running the firware on your DL2 dash with predictive lap times ETC ?
Regards
Tboner
Tboner
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- Posts: 133
- Joined: Mon Mar 26, 2007 8:22 pm
We have found out today that the k-series engine running the Gems ECU is NOT OBD-II compatible on all vehicles. Although it may well have the right connector on it it actually uses different pins and a different protocol to the real OBD-II interface. If your connector has +12v on pin 16 and gnd on pin 5 then it most likely is OBD-II, if it doesn't have these then it won't be and the interface won't work.
The update rates on OBD-II are about 10Hz at best, a direct connection to the logger is always better where possible.
Regards,
Martin
The update rates on OBD-II are about 10Hz at best, a direct connection to the logger is always better where possible.
Regards,
Martin
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- Posts: 133
- Joined: Mon Mar 26, 2007 8:22 pm
I thought I meant MEMS, but after have a read it could have been GEMS. Unless somebody else has some concrete evidence on this I suggest you just take care. If you want to confirm if it has an OBDII compliant port or not, check that it has power on pin 16 and ground on pin 5. If not, it is not OBDII compliant.
Martin
Martin
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