Is there any possible connection between running rich and the TPS needing adjustment? I am getting 21 and 51 for codes and am trying to figure out how to solve what's going on. I have put on a new TPS and am wondering if I need to adjust etc.
TPS, Codes 21 & 51
- Thread starter astkgse
- Start date
K. I have adjusted the TPS and the timing. Both are plumb according to the TSRM. BTW be sure to adjust the TPS based on your engine. It seems there are many who have had problems adjusting the TPS. The two engines (7mgte & 7mge) have sensors that are opposites to one another. The terminals are inverted one from the other. I may be the only idiot out here who didn't realize that initially but at least you can learn from my mistake if you, too, are prone to be stupid.
The adjustment solved the code 51 but I am still getting a code 21. Anyone know reasons this would be the case and where I should begin looking?
The adjustment solved the code 51 but I am still getting a code 21. Anyone know reasons this would be the case and where I should begin looking?
The adjustment solved the code 51 but I am still getting a code 21. Anyone know reasons this would be the case and where I should begin looking?
Is this a GTE? Then first thing to check is the heater circuit continuity on the oxygen sensor?
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=121
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=121
Yes, it is a GTE. Just checked that resistance and it reads 0.00. Will replace. Thanks for the info.
I'd double check that. Should read infinite ohms. 0 ohms would be a short which would normally blow the EFI fuse.
astkgse;1630502 said:
He means the zero ohms you claimed to have measured in that circuit, caused by a faulty sensor heater or otherwise, would result in current flow far exceeding the fuse rating. Since he is correct you must be connecting or reading the meter wrong.
However the heater circuit shouldn't measure infinite either. In your case it might and could well be the cause of your code but it normally should be around 3-6 ohms depending on temperature. That applies to older sensors. Newer OEM sensors or those of aftermarket origin may be slightly higher.
Of course, my partner in electrical crime is well aware of this but I felt it should be pointed it out anyway...
However the heater circuit shouldn't measure infinite either. In your case it might and could well be the cause of your code but it normally should be around 3-6 ohms depending on temperature. That applies to older sensors. Newer OEM sensors or those of aftermarket origin may be slightly higher.
Of course, my partner in electrical crime is well aware of this but I felt it should be pointed it out anyway...
Thanks and I was reading on the wrong setting. It is reading 3.8.
---------- Post added at 09:31 PM ---------- Previous post was at 09:25 PM ----------
So, do I need to be looking at wiring or somewhere else? I don't see where the TSRM directs if the sensor is checking out.
---------- Post added at 09:31 PM ---------- Previous post was at 09:25 PM ----------
So, do I need to be looking at wiring or somewhere else? I don't see where the TSRM directs if the sensor is checking out.