MR2s without air conditioning have a single Cooling Fan Assembly on the right side. For vehicles with air conditioning, there is an additional condenser fan on the left side. The following tests apply to both fans. To test the Cooling Fan Assembly, turn the ignition key to the On position and ensure the fan is not running. If it is, check the fan relays, temperature switch, and circuit for any issues. Disconnect the electrical connector from the coolant temperature switch and the fan should come on. If it doesn't, check the fan relay, motor, ignition relay, and fuse, as well as the circuit for any short circuits. Reconnect the temperature switch connector. For a high-temperature test, start the engine and warm it above 93°C. The fan should come on when the coolant exceeds this temperature. If it doesn't, check the temperature switch. To test the temperature switch, check continuity between its two terminals with an ohmmeter while gradually heating water. There should be continuity below 83°C and no continuity above 93°C. If the switch fails either test, replace it. The fan main relay, located in the No. 5 junction block, should be tested for continuity and operation. Check continuity between specific relay terminals and ensure there is no continuity between others. Apply battery voltage across certain terminals and check for continuity between others. If the relay fails any of these tests, replace it. The No.1 fan relay, also located in the No. 5 junction block, should be tested for continuity and operation as well. Verify continuity between specific terminals and ensure there is no continuity between others. Apply battery voltage across certain terminals and check for continuity between others. If the relay fails any of these tests, replace it. To check the fan motor, disconnect the electrical connector and connect it to a hot wire and ground. The fan should come on. If it doesn't, replace the fan motor. To replace the fan motor, disconnect the battery cable, remove the cooling fan electrical connectors, remove the bolts attaching the fan shrouds to the radiator, lower the fan/shroud assembly, remove the fan nut, remove the fan motor shaft C-clip, and remove the motor from the shroud. Installation is the reverse of removal.
Posted by ToyotaPartsDeal Specialist 
