-where does the OBDII sensor pick up coolant temp?
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If your AC is cutting out I would not ignore the temperature.
The ECU temp sensor (what OBDII reads), AC temp switch and the OEM coolant temp gauge sender are all in a row on the front left side of the head above the oil filter.
Well I have good news (kind of)... I barrowed a OBDII reader and my new temp gauge is reading about 13 degrees high at 185 degrees, that is the obdII read 185 and my gauge was reading 198ish. So I am not running as hot as I thought but I am still running a bit hot...although my temps are much better than they were before 180 degree thermostat/ fan clutch/ flush/ shroud seal.
Why would my temp gauge be reading hot? It is new!
It is an aftermarket piece, who knows how well it is made. I would call the manufacturer and ask them if there is a way to calibrate it. 185 is not hot by the way.
185 was today...the outside air temp is around 60 degrees. Since I have replaced all the recent parts the only time my AC shut off was going up a steady 8% grade about 15 miles at 65 mph (foot to the floor!) tranny between 2 and 3 and the ambiant air temp was 95 plus. The AC turned off right as I crested the hill, as soon as I started to coast down hill (less than 1 mile) the AC came back on. I did the same hill with the same conditions (few minutes later) with the heater on full blast and my temps appeared to drop about 15 degrees compared to the previous time with full AC. Does this mean anything special?
185 was today...the outside air temp is around 60 degrees. Since I have replaced all the recent parts the only time my AC shut off was going up a steady 8% grade about 15 miles at 65 mph (foot to the floor!) tranny between 2 and 3 and the ambiant air temp was 95 plus. The AC turned off right as I crested the hill, as soon as I started to coast down hill (less than 1 mile) the AC came back on. I did the same hill with the same conditions (few minutes later) with the heater on full blast and my temps appeared to drop about 15 degrees compared to the previous time with full AC. Does this mean anything special?
The link didn't work...is that the thread about the truck fan that cdan did? did you guys experience similar temps with supercharger and TRD supercharger fan. Does the toyota truck fan help that much?
I got a quote from Ron Davis to build a whole new shroud with two high flow elec. fans...400 bucks! I would do it if I KNEW it would help but I can't imagine it would help that much except for slow speeds, ie below 1500 RPM
mark you may want to beta test the oem temp gauge mod at the link below to give you a back up.
if your aftermarket gauge read 240 at AC shut off (226) and 230 when the factory gauge first moved (s/b 217-222) then the aftermarket gauge inaccuracy looks linear. it is off by about 13-14 degrees.
The link didn't work...is that the thread about the truck fan that cdan did? did you guys experience similar temps with supercharger and TRD supercharger fan. Does the toyota truck fan help that much?
I got a quote from Ron Davis to build a whole new shroud with two high flow elec. fans...400 bucks! I would do it if I KNEW it would help but I can't imagine it would help that much except for slow speeds, ie below 1500 RPM