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AFR drop out at 4.98 volts on D10
Posted: Sun May 11, 2014 10:49 pm
by aaimada
Noticed in Smanager display, my AFR drops to 9AFR while my NGK AFX Gauge is showing 16.00AFR. Monitored ELD D10 voltage, stays at 4.98volts which should correspond to aprox. 16.00AFR. I have it set up to 0 volts = 9.0AFR and 5 volts = 16.00AFR
Possible faulty PCM and/or PCB?
Re: AFR drop out at 4.98 volts on D10
Posted: Mon May 12, 2014 6:44 am
by Hondata
Have you removed R136 and R138?
Re: AFR drop out at 4.98 volts on D10
Posted: Mon May 12, 2014 9:41 am
by aaimada
Hondata wrote:Have you removed R136 and R138?
Yes both resistors have been cut.
Re: AFR drop out at 4.98 volts on D10
Posted: Mon May 12, 2014 10:39 am
by Hondata
Double check you have the correct pin, then use a multimeter to see what the input voltage actually is.
Re: AFR drop out at 4.98 volts on D10
Posted: Mon May 19, 2014 11:35 am
by Spunkster
Change your display settings to go higher than 16, set them to something like 20 or 30 for a max
Re: AFR drop out at 4.98 volts on D10
Posted: Tue May 20, 2014 12:21 am
by aaimada
Spunkster wrote:Change your display settings to go higher than 16, set them to something like 20 or 30 for a max
I think I tried that but I'll try it again.
That would be in options then sensors right?
Re: AFR drop out at 4.98 volts on D10
Posted: Tue May 20, 2014 9:41 am
by Spunkster
Double click the sensor in the sensor list window.
Re: AFR drop out at 4.98 volts on D10
Posted: Wed May 21, 2014 1:23 am
by aaimada
Spunkster wrote:Double click the sensor in the sensor list window.
Same problem.
At 16AFR on my meter = ELD 4.96 volts. L.volt drops to 0.00 volts which shows up 9.00 AFR in display.
Anything lower than 4.96 volts, L.volt equals ELD volts.
It's like the ecu cannot interpret ELD to L.volt when it exceeds 4.95 volts
Re: AFR drop out at 4.98 volts on D10
Posted: Wed May 21, 2014 9:34 am
by Spunkster
You might be better off using a wideband that reads from 10-20 AF instead of just 9-16 AF. Most widebands can read to 20 AF. I have tested this with my own vehicles using the PLX widebands and they do not show the same issue you are having. When they go fully lean they stop at 4.98V and show a max AF reading of 19.85:1.
Re: AFR drop out at 4.98 volts on D10
Posted: Wed May 21, 2014 9:40 pm
by aaimada
Spunkster wrote:You might be better off using a wideband that reads from 10-20 AF instead of just 9-16 AF. Most widebands can read to 20 AF. I have tested this with my own vehicles using the PLX widebands and they do not show the same issue you are having. When they go fully lean they stop at 4.98V and show a max AF reading of 19.85:1.
I tried another s300 and it works perfectly. No drop outs at all when at 16AFR.
Looks like Ill be needing a new s300.
Re: AFR drop out at 4.98 volts on D10
Posted: Thu May 22, 2014 4:19 pm
by Spunkster
Did you swap just the s300 or the s300 and ECU?
Re: AFR drop out at 4.98 volts on D10
Posted: Fri May 23, 2014 1:07 am
by aaimada
Spunkster wrote:Did you swap just the s300 or the s300 and ECU?
A new ecu with a s300v2.
Re: AFR drop out at 4.98 volts on D10
Posted: Fri May 23, 2014 9:15 am
by Spunkster
The s300 itself has nothing to do with the voltages the ECU sees. You are inputting the voltage into the ECU, not the s300. Try your s300 in the known working ECU.
Re: AFR drop out at 4.98 volts on D10
Posted: Sun May 25, 2014 11:46 am
by aaimada
Spunkster wrote:The s300 itself has nothing to do with the voltages the ECU sees. You are inputting the voltage into the ECU, not the s300. Try your s300 in the known working ECU.
I going to buy a new s300. Hope it works.
I also notice my lap top disconnects when I hit vtec or red line. I have to unplug my laptop and plug it back in for it to work again.