A Santana 3000 sedan owners reflect the water temperature indicator is low, has been replaced outside the water temperature sensor but the fault remains the same.

     Open the ignition switch to find the water temperature indication below 60 degrees, and actually do a lot of difference. Unplug the sensor 4-wire plug to find the yellow / red line directly to the ground, found that the needle can not point to the highest position, measured with a multimeter this line voltage of more than 5V, and the normal should be about 10V.
     Preliminary judgment for two reasons: 1 water temperature table failure; 2 line reasons. Because the water temperature table is too expensive to replace, can only be excluded after the external reasons to replace. So check the line, remove the instrument to find the yellow / red line, with a multimeter to measure this end and the sensor side is turned on, measured between the resistance exists, the car water meter line to: instrument ---- fuse box above Single plug - a single black plug on the computer --- engine line. According to the conventional plug the most failure, unplug the computer side of the plug found inside the water and oxide, clean up troubleshooting.