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Showing results for tags 'temperature'.
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So I have a 1998 LS400 with 170,000 miles on it. It has been babied and garaged. It is in fantastic shape. One morning this week I started the car, drove about a mile and noticed that the temperature gauge was just under the red line. It normally hangs out just under the halfway mark. I tuned around and drove home as not wanting to run it too hot. Here's what i checked on to determine the issue. Water pump, timing belt, thermostat, all radiator hoses and new coolant was just done 12,000 miles ago. This check out normal. Then I thought that it might be the sensor/sending unit indicating the wrong temperature to display on the gauge. I was going to just buy a new one and change it out, but then I thought of hooking up my OBDII scan tool to check the engine temperature. Sure enough the engine temperature read normal through the real-time scan tool. Here's my logic. If the scan tool shows the correct temperature as read from the ecm computer, it must be getting the temperature sent to it from the sensor correctly which means that there isn't a reason to change out the temperature sensor as a possible fix. I believe that I can rule it out. I think that only leaves me the instrument gauge itself that could be the culprit in this issue. Also, I think that this is the part I need. CLICK-HERE If this is the issue, would it be better to just buy the gauge and change it out or send the instrument cluster in somewhere to be rebuilt? Also, occasionally the tach sticks at zero so a good slap on the top of the dashboard above the gauge fixes it. Maybe a rebuild of the instrument cluster would fix this too. Please help me figure out this dilemma. I try to keep everything on the car working at 100% so even if the car isn't running hot, I want the gauge to report the correct temperature.
ddlaz posted a topic in 04 - 09 Lexus RX330 / RX350 / RX400hHey all. I've been googling this issue for 2 days with no fix. I'm close to spending the money to get an rx330 service manual. My issue - Since last winter, the darn dual climate control will only put out heat on the driver's side vents on any warm temperature setting(above ambient), passenger side will only put out room temperature air. Cold A/C will come out of both sides just fine. AC diagnostics check says code 11, which I've read to be the temperature sensor circuit. I tested the sensor by the knee on the driver's side and resistance goes up and down with temperature, within ranges that I've seen for other thermistors--this one read 1.68 kohm last night. I checked the connector and read 3.5volts going to the sensor. Sprayed in contact cleaner and reconnected it. Still the same error. Are there two cabin temperature sensors in this car?? if so, where is the second one? It seems like there is a second sensor on the passenger side that thinks the cabin temp is high so it doesn't allow the air mix control to allow hot air through. My second theory is that the air mix control servos aren't working on the passenger side. I don't know what servo I was looking at but I could peek a servo moving up and down on the passenger side left knee area under the dash. it would move up and down as I changed temperatures. One last thing to note - i take it off dual climate control and the problem remains the same. My thinking is that the dual climate control off would mean it uses the one temperature sensor to control heat to both sides of the car.....