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D10 ELD 0.2v.
Posted: Tue Jun 16, 2020 6:59 am
by B.Burke
As the Subject line mentions.
When measuring input to ELD D10 with TC unit connected i see 0.2v on Smanager.
Power and ground are both taken from A25 & A23 approx 10cm from the ECU connector.
Is this 0.2v a problem?
May it cause early/ premature TC cuts to occur?
How to solve this non Zero voltage? Add a resistor in line or to ECU? Voltage Offset available in Smanager?
Al information greatly appreciated.
Re: D10 ELD 0.2v.
Posted: Tue Jun 16, 2020 7:56 am
by Hondata
Try moving the TC ground to the thermostat housing.
Re: D10 ELD 0.2v.
Posted: Mon Jun 22, 2020 2:05 pm
by B.Burke
I have grounded the TC unit at the thermostat housing. ELD voltage dropped from 0.2v to 0.18v
Is it an option to just use the voltage offset parameter in S300 TC. Set it to + or - 0.18v?
I understand its best practice to fix any non zero value. And will endeavour to find the root cause.
But why is there an offset voltage option?
All info appreciated.
Re: D10 ELD 0.2v.
Posted: Mon Jun 22, 2020 2:38 pm
by Spunkster
You can try to use the offset to fix it, but that sometimes does not work as the voltage offset is not linear.
Re: D10 ELD 0.2v.
Posted: Tue Jun 23, 2020 6:30 am
by B.Burke
Hi again.
I am unable to input a negative value into the voltage offset.
Is this normal?
- ELD 0.18.png (18.05 KiB) Viewed 16225 times
- S300 tc paras.PNG (16.21 KiB) Viewed 16225 times
Re: D10 ELD 0.2v.
Posted: Tue Jun 23, 2020 7:35 am
by B.Burke
Hi.
- I have plotted the full range TC output voltage test VS the ELD measured input. See below. The relationship is almost linear.
- Tested the max overslip output of 50% this resulted in ELD of 4.08v.
- Tested 1% overslip (see below) this resulted in ELD of 1.23v.
Am i correct in assuming no TC action will be applied below 1.23v at ELD? Therefore my non-zero 0.18v will not effect normal driving with TC switch set to OFF?
Thanks again
- TC vs ELD linear.PNG (31.49 KiB) Viewed 16224 times
- 1 percent overslip equals 1.23v.PNG (33.84 KiB) Viewed 16224 times
Re: D10 ELD 0.2v.
Posted: Tue Jun 23, 2020 10:54 am
by Hondata
It's going to work ok with that relationship from the TC to S300. If you want you can reset the S300 offset and then change the TC output to get the 0% output right on 1V on the S300. The rest is not that critical.
Re: D10 ELD 0.2v.
Posted: Tue Jun 23, 2020 2:43 pm
by B.Burke
Okay. Thank you for the reply.
Just to clarify.
- As it is set up right now the 0.18v will not create any TC action to occur?
Options to optimise the setup further are.
- Set voltage offset in S300 para back to 0v.
- Activate overslip outout test and select 0%
- Modify the TC output settings so I read exactly 1v @ELD when 0% slip test is active
Can you please confirm?