Coolant and fans won't turn on Options

[chris32880]

Car overheated other day and it was leaking, it is leaking out of the plastic white looking coolant low to full tank it has a whole right at the top, not sure if the hole is plugged on other celicas but it's leaking from there, the fans are not kicking on either everything else is fine, please show me pic of where the fan sensors are so I can get them from the junk yard

[Special_Edy]

On the GT, the fan thermostat switch is located on the passenger side of the bottom tank of the radiator, right next to the lower radiator hose. It is a two wire plug, the conduit runs down the radiator support and fan shroud. If you unplug the wire from the sensor it will force the relays to kick on the fans. If the fans run nonstop when the plug is disconnected, the switch is bad; if the fans still dont kick on, either the relays or the fans are defective. The switch is literally either open or closed, open circuit(no continuity)= fans on; closed or short circuit = fans off.

The temperature sender unit (for the temp guage on the dash) and the coolant temperature sensor are located on the coolant outlet pipe near the distributor where the upper radiator hose exits the engine. The coolant temperature sensor has a two wire plug, it is used by the ECU. The temperature sender has a one wire plug.

Temperature Switch= Turns Fans on/off
Temperature Sender= temp guage on cluster
Temperature Sensor= ECU uses for F/A ratio

Kind of confusing that there are three of them, but the S-word in all of them determines their use. Many cars use only two or even one sensor to perform all these tasks, ours uses 3

Let us know what happens when you disconnect the two wire plug from the bottom of the radiator, then we will be able to advise you on the next step in diagnosis or repair.

This post has been edited by Special_Edy: Jun 6, 2014 - 10:21 AM

[Smaay]

On the GT, the fan thermostat switch is located on the passenger side of the bottom tank of the radiator, right next to the lower radiator hose. It is a two wire plug, the conduit runs down the radiator support and fan shroud. If you unplug the wire from the sensor it will force the relays to kick on the fans. If the fans run nonstop when the plug is disconnected, the switch is bad; if the fans still dont kick on, either the relays or the fans are defective. The switch is literally either open or closed, open circuit(no continuity)= fans on; closed or short circuit = fans off.

The temperature sender unit (for the temp guage on the dash) and the coolant temperature sensor are located on the coolant outlet pipe near the distributor where the upper radiator hose exits the engine. The coolant temperature sensor has a two wire plug, it is used by the ECU. The temperature sender has a one wire plug.

Temperature Switch= Turns Fans on/off
Temperature Sender= temp guage on cluster
Temperature Sensor= ECU uses for F/A ratio

Kind of confusing that there are three of them, but the S-word in all of them determines their use. Many cars use only two or even one sensor to perform all these tasks, ours uses 3

Let us know what happens when you disconnect the two wire plug from the bottom of the radiator, then we will be able to advise you on the next step in diagnosis or repair.

nailed it!!!!