anyone with scanguage 2?

[eng2d2]

How accurate is the volt and temp guage on this?

 

[thomsbrain]

It reports exactly what the ECU says. So it is as accurate as whatever sensors report to the ECU.

 

[eng2d2]

I am not sure I should trust the ECU. My logic is, isnt the stock temp guage connected to the ECU. WE all know that stock temp guage is not reliable.

 

[LTC8K6]

I am not sure I should trust the ECU. My logic is, isnt the stock temp guage connected to the ECU. WE all know that stock temp guage is not reliable.

Generally there are two temperature sensors if you have an old fashioned gauge, one for the gauge and one for the ECU.

More modern cars would not need two different sensors as the "gauges" would get the data from the ECU.

 

[freeskier93]

I am not sure I should trust the ECU. My logic is, isnt the stock temp guage connected to the ECU. WE all know that stock temp guage is not reliable.

Generally speaking the gauges aren't displaying true data. Often the data they are receiving/displaying is modified, usually heavily filtered or averaged, or straight up binary.

The ScanGauge works using OBD data meaning it is raw sensor data.

 

[thomsbrain]

Generally speaking the gauges aren't displaying true data. Often the data they are receiving/displaying is modified, usually heavily filtered or averaged, or straight up binary.

The ScanGauge works using OBD data meaning it is raw sensor data.

Correct. The temperature gauge on your car doesn't report anything close to actual temperature that the ECU is tracking from the sensor.

Modern car gauges generally display a consistent temp all the time as long as the temp is within normal parameters. For most cars, that will be anywhere from 180-210+ degrees F as reported by the Scangauge, where the car's gauge won't move at all. So the Scangauge is much more accurate and responsive.

 

[eng2d2]

Thanks! Makes a lot of sense now.

 

[tortillasoup]

yeah also there are two temps minimum that are reported by the ECU, Intake Air temperature and water temperature.

 

[jlee]

I am not sure I should trust the ECU. My logic is, isnt the stock temp guage connected to the ECU. WE all know that stock temp guage is not reliable.

The stock gauge is not reliable, but if you watch the coolant temp via an OBDII reader you can watch the coolant temp climb relative to the gauge. Your gauge will show "normal" temperature levels well before the coolant is fully warmed up.