Questions and Answers

Acura Integra Cooling Fans Q. Hi Mr. Ciulla, Happy New Year! I hope you had a nice break. I e-mailed you a question, and got your response that you weren't answering questions for a while and I thought GOOD, everyone needs a good break. I just got back from mine. Anywho, below was a question I sent you about the fan in my Acura Integra, and your response is above it.

Well, my problem has gotten worse. The fan used to come on every so often when I shut off the car. Then, it got to the point where if I put the key in the ACC position, and then OFF (without starting the car even), the fan would come on for a while. Hmmm... the engine wasn't even hot or anything.

Now, it's even worse I'm afraid. Yesterday I stepped outside and I heard the fan running. I didn't even drive the car for the past 4+ hours, and the fan was running. I let it go, thinking it was a fluke.

I came out this morning, and my battery was dead. For all I know, the battery could have been running all night long, killing my battery off.

What do you think I should check? Sensors, gauges, etc? Is there a way I can disable the fan for the meantime so I can at least start my car in the morning? It's a crap shoot whether or not I'll have a car for work! Any help would be great! Thanks for all of your help in the past!!!!!

John

A. The next thing to check would be the Fan Timer Unit. This is how:

1. Perform tests with fan timer connected and ignition switch On.
2. Refer to diagram for fan timer terminals.
3. Check for voltage between terminal 4 and body ground, one volt or less should be indicated, if not as indicated, repair open to body ground.
4. Check terminal No. 6 for battery voltage, voltage should be indicated, if not check fuse 20, if ok, repair open in white wire.
5. Check terminal No. 7 for battery voltage with ignition switch On, voltage should be indicated, if not check fuse 24, if okay, repair open in BLK/YEL wire.
6. Check terminal No. 4 for battery voltage with ignition switch On, voltage should be indicated, if not check fuse 21, if okay, repair open in YEL/BLK wire.
7. Check terminal No. 1 for battery voltage, voltage should be indicated, if not replace fan timer unit, before connecting new timer check continuity between YEL/WHT wire and ground. If continuity is indicated, do not connect new timer as damage will occur.
8. Connect terminal No. 6 to body ground, condenser fan relay should come on, if not check for open in BLU/RED between fan timer and condenser fan relay, if okay, check for open between YEL/WHT and BLK/YEL wires, if okay, test condenser fan.
9. Check terminal No. 5 for battery voltage, with oil temperature below 108°C, about 11 volts should be indicated, if not, faulty oil temperature switch, short to body ground or faulty fan timer unit are indicated.