Question about 2002 Toyota ECHO
You should check the 30 amp "RDI" fuse and the 7.5 ECU-IG fuse. Both fuses are critical to the operation of the fan system. The RDI fuse sends power to the fan #1 relay. The A/C amplifier turns on power to the fan #1 relay, this is why your fan works on A/C.
Now, with no cooling fan under "normal conditions" (A/C off), you need to have a good fan #2 relay, and a good water temp switch. This switch is on the engine, near the thermostat housing (I think); with a single plug, with a white with a blue trace wire going to it. Remove this wire from the sender, and jump it to ground (anywhere on the metal of the engine) with the key on (engine OFF). If the fan starts, you need a new water temp sending unit. If not, then consider a new fan #2 relay. This system is pretty simple.
Posted on Sep 24, 2008
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Posted on Jan 02, 2017
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are many possibilities for car overheating.
thermostat clogged radiator/plugged radiator, radiator hose worn out. Coolant
running low. Low coolant pressure. Faulty temperate sensor.
suggest you to go through the troubleshooting details mentioned in the link
All types of car overheating problems and troubleshooting?
These will help.
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