1999 Toyota Camry 2.2 Coolant fan isn't coming on.

Asked by Mar 30, 2014 at 04:38 PM about the 1999 Toyota Camry LE

Question type: Maintenance & Repair

The car has 205k miles on it.  I noticed that the coolant wasn't circulating so i replaced the
ECT sensor, that got the coolant to circulate.  However, after awhile of short driving, the
car would overheat again.  I noticed, while the car was parked and running, that the
coolant fan wasn't coming on.  Is is commonly a relay issue or should i just chuck out the

6 Answers


Check relay first

4 people found this helpful.

Unplug the fan and run a jumper wire from the battery to it. If it comes on, you know the fan is good. If fan is good, replace the relay. If that doesn't seem to work, replace the temp sensor.

1 people found this helpful.

Easy to fix take the wire off the switch location is on the the onstage housing upper hose.one wire switch take unplug and ground it on engine while key is on position if the fan come on the switch is bad if nothing happens the relay is bad or if it stays on the relay is bad Two fan one ac fan on when ac is on engine fan is run buy switch

1 people found this helpful.

Jon, just a tip, pay attention to the date of the post you are responding to. It's over a year old. You are just wasting your time. Go to "All questions" and answer the new posts. People have long since fixed the issue by now. Not trying to be a snot, just letting you know since you are a new guru.....

1 people found this helpful.

Actually, I know several people that will look through older questions because they are having the same issue. That's what I am currently doing as I'm trying to troubleshoot a fan issue. Thanks, Jon. I appreciate you still giving input even thought the asker may not need it. These cars are still on the road and other people have similar issues.

4 people found this helpful.

Minga... first of all, there's a tremendous amount of mis-information in this posting, from start to finish. Beware of what you read. Not everyone that posts stuff online is a mechanic or knows how to properly diagnose a problem. Problem: Fan(s) not turning on while car is sitting, running at idle. Engine eventually overheats. I have personal experience with this problem. I am a professional mechanic. My experience with a 2001 Camry 2.2L 4 cylinder engine was that the fan switch, located in the bottom tank of my radiator was malfunctioning / bad. Also the weather pack connector that attached to it was corroded and needed to be replaced. Because of this, the radiator fans would only turn on when commanded by A/C circuit (defrost circuit) and at no other time, as that is a separate control circuit designed to run both fans when additional cooling is needed for A/C use. Normally, only the PRIMARY fan runs when necessary, dictated by engine temps that begin to get excessive (somewhere around 200 degrees F - I didn't measure the actual "on" temp specifically). The primary fan is located on the left side (diriver's side) of the car. It is switched by the fan temp switch that is located & screwed into the bottom of the radiator, below the secondary fan, located on the right (passenger's side) of the radiator. You must first remove the secondary fan to gain easy access to the fan switch. If you disconnect the fan temp switch when the car is running (or ignition switch key on, engine off), the primary fan will run non-stop. This is because the fan temp switch keeps the fan off until the switch warms up and opens the circuit. It is the exact opposite of how many circuits are designed. In other words, if you put a paper clip (jumper) in the two female pins of the disconnected sensor plug connector, the fan will shut off. The fan switch is in a terrible location, as it is susceptible to corrosion and problems due to the elements (moisture, winter rock salt and calcium, for example), and is a common failure point. Again, also check the connector/wiring, as it can often be an issue as well. *** Some very important things to note... The SENSOR located / threaded into the cylinder head near the top radiator hose is for the EFI management of the engine. Nothing else. It does NOT control the cooling fans. The one-wire sender to the left of that sensor controls the coolant temperature gauge in the dash, NOTHING ELSE. Good luck folks, and god bless! ~ AJ

5 people found this helpful.

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