-Fan doesnt turn on when car gets hot? Is radiator burning hot all the way across? F7 (5A) Convertible top actuation switch, navigation system control module, audio unit output amp … I've seen this before... fan is expensive for what it is I also did not want to replace it lol. 2003 325i e46 BWM here. Check power and ground at the fan connector. is there a way of shorting the temp sensor and stuff to get the fan to turn directly? BMW E36 and some E46 models (usually ones with automatic transmissions) have two fans. The cooling fan that operates during non-AC operation (just a running engine) if electric, will be controlled by a thermal switch in the lower radiator tank and may not turn on at all unless the engine is warmed up. The fan has a final stage resistor built in so it gets a pwm signal for activation and speed. It was an aftermarket made in Taiwan. No delays. Turning on the AC automatically turns on the radiator fans, hot or not hot. i did some more testing now in the drive way. I tried activating the fan but it didnt work, so i bought a new electric fan, when i installed it, i tested it using the BMW software, it worked fine, and continued so for a week, til overheat again. The electric fan is activated by means of a power output stage directly on the fan motor. It may not display this or other websites correctly. Is the temp gauge responding to engine temp? 3 Fanatics (E21 E30 E36 E46 E90 E91 E92 E93 F30). And that's coming from someone living in Florida in July/August. Just replaced the fan,the fan still wont engage. 13 people found this helpful. When the correct parameters are met, a … These cooling fans rely upon electric motor, and they typically have a moderate to high slow draw, which means that they are commonly controlled with a relay. F6 (5A) Vanity mirror lamps, convertible top control module. If it doesn't, the fan or its control circuitry must be investigated to determine the failure. i have just checked the big fuse in the glove box and it fine. Blower Motor Final Stage Fan Resistor Failure. Disconnected the sensor from the lower radiator hose to engage the fan but … I was not until we talked with a another person who also experienced the same problem, that we found it there was a recall by BMW. What I did was, like in the summertime, I would just get in the habit of turning it on while driving,[it cant hurt anything], and, like if I would go into a store or something for a short time, I would just leave it on. The cooling fan, which is behind the radiator grille, removes heat from the engine’s coolant. check out the. Use the oem electric fan from the manual transmission cars. The problem is that the electric cooling fan is not coming on, this car has just one fan behind the radiator since its a manual. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan … The fan doesn't spin on startup (part of a startup self-system check) which leads me to believe it is either a power relay issue, or a burnt out fan motor. So my fan isn't turning on after I installed a new radiator. you can connect it directly to the battery + terminal under the hood. Verified voltage coming out of harness, about 12V. Thread starter Zound; Start date Jul 31, 2014; Zound ///Member. start the car and open the radiator filler cap there should be a small amount of water spraying into the expansion tank at a steady stream near the top (if this does not happen its your water pump). Car has 68K miles on it. It over heats when idling, fan does not turn on, brand new electric fan. Comments: I have a problem with the bmw e46 1.9-77 kw cooler fan slowly turns so that it happens that sometimes it raises the engine tempo more than permitted. No … Excellent replacement for the mechanical clutch and auxiliary electric fan on e46 automatic 3 Series. 323i New member. Bmw e46 323i manual 99 model electric fan on radiator does not turn off even if the car off and locked - Answered by a verified BMW Mechanic We use cookies to give you the best possible experience on our website. … The belt-driven fan should be turning at some speed all the time if the engine is running and at much higher speed with a hot engine. Opened the hood and was pretty sure it was the belt or a pulley. Put it in the car and stopped working again. The cooling fan that operates during non-AC operation (just a running engine) if electric, will be controlled by a thermal switch in the lower radiator tank and may not turn on at all unless the engine is warmed up. This fan is located between the radiator and the front of the engine A failed electric cooling fan can leave your BMW E46 3 series overheating in traffic or parked idling with the AC on. Checked the 50amp fuse and it looks good. When the A/C is switched on, the electric fan is not immediately activated. Jul 31, 2014 #1 So it all started with a long Sunday drive, where at the end of my journey I started hearing a whine/squeal from the engine. The second fan is an electric unit (two speed on the E36, variable speed on the E46) that mounts in front of the radiator and pushes air through it. This article concerns itself with the latter fan, which is otherwise known as the "auxiliary fan", or "aux fan" for short. Now you just said exactly what I said....or pretty close. This fan is electrically controlled and relies on the signal from the onboard computer. I'm overheating on when the car is at a stop so I know it's fan related. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. 2006 BMW M3, w/ 15k miles "ELECTRIC COOLING FAN COMES ON AND STAYS ON HIGH WHILE ENGINE IS RUNNING". Until such time as you can either complete your checks of the circuits or take the car to a service facility, pull the fuse in the fuse … … Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. Mar 30, 2015 #4 Hey moranor, thanx for taking the time out to respond. Blower Motor Final Stage Fan Resistor Failure. We replaced his expansion tank last week. Fuse box diagram. Vehicles with M62TU, S62 and M73 engines feature a viscous fan as well as an electric fan. It can also make your AC not blow as cold as it's supposed to. OP if most of your travels are on the Highway and with speeds over 30MPH, you should be good. Also, check the connector plugs at the relay and control unit. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. I checked all the fuses, including the 50 Amp fuse behind the glove compartment, swapped the coolant temp sensor from another 323I to … We use cookies to give you the best possible experience on our website. Can you touch the switch bare handed? Comments: Any idea on how to re wire a relay to the electric fan on a e46? This will cool the radiator … Engine temp is normal, actually below normal due to fans running at full speed. When the temperature exceeds a specific value -- usually 215 degrees Fahrenheit -- the computer will turn the fan on. It could ofcourse also be a broken fan, which is not very expensive too. If he wants to overheat the engine, he should definitely use the AC when idling. When the temperature exceeds a specific value -- usually 215 degrees Fahrenheit -- the computer will turn the fan on. ... those fans have been known to literally blow apart when they have all their blades,and turn a minor part issue into a massive $1,500+expense (if you do the work yourself). One of the most common failure points on aging BMW’s is the cooling system. I would assume there is a sensor or wiring issue. Check the wirings going to the radiator fan from the control unit or relay. June 26, 2015 : Followup from the Pelican Staff: Is the fan coming on? Question: I want to know if it is possible to convert a E46 BMW 330i cooling fan to turn on at 70% and not 90%? The fan should have been on @ 100% during an overheat situation. 3 May 2013 at 7:55 PM #2. The fan will usually store a fault in the dme for activation or ihka system faulted for excess pressure (because fan is not coming on). When I run the engine idle 15 minutes later temperature goes up to 240 degrees, the high fan kicks on and does not bring the temperature down. Check in the connector plugs for any signs of corrosion. When it doesn't register the overheating coolant, it won't turn on the fans. This fan resides behind the radiator and pulls air through it. But when I put the heat on full blast I am getting cool to warn air blowing and the electric fan never kicks on. http://lmgtfy.com/?q=e46+%3Cinsert+problem+here%3E, General BMW and Automotive Discussion sponsored by Intercity Lines, Track, Auto-X & Drag Racing sponsored by Bimmerparts.com, Professional Motorsports sponsored by Bimmerworld, Suspension Tech and Handling sponsored by eBMWParts.com, Tire & Wheel Forum sponsored by The Tire Rack, Car Audio & Electronics sponsored by Bavsound, Car Detailing and Show & Shine Prep sponsored by Autogeek.net, General BMW Mechanical Help sponsored by RM European Auto Parts, 1 Series & 2 Series (E81, E82, E87, E88, F20, F22, F23), 3 series & 4 Series (E21, E30, E36, E46, E9x, F30, F32, F33, F36, F44), 5 Series (E28, E34, E39, E60, E61, F10, G30), 7 Series (E23, E32, E38, E65, E66, F01, F02), 2003+ X3, X4 (E83, F25, F26, F97, F98, G02), 2019+ Z4 (G29) / 2020+ Toyota Supra (A90/J29), BMW Parts For Sale sponsored by Bavarian Auto Recycling, BMW Parts Wanted sponsored by Bavarian Auto Recycling, Group Purchases & Supporting Vendor Specials presented by eBay, Georgia sponsored by Harrison Motorsports, If this is your first visit, be sure to Having a problem with the electric fan on the car not turning on. I have a 323ci e46 1999 model, the other day my rad fan came on for no reason, the engine was stone cold, i removed the pos from the battery waited for about a min then replaced the pos connection problem solved, this was about a week ago. NOVA scan tool shows no codes or evident problems. Bmw e46 323i manual 99 model electric fan on radiator does not turn off even if the car off and locked - Answered by a verified BMW Mechanic We use cookies to give you the best possible experience on our website. Way of Testing Electric Fan ? As BMW … Plugs directly into existing harness. If the fan receives a false signal, the fan might not turn on, causing the engine to overheat. The electric fan should comes on while idling with the AC on. The AC blower acts like a last ditch radiator fan pumping heat out of the system. And I agree with the first answerer that sometimes when the engine temp is abnormally hot the engine computer allows the fan to run for a minute or two even after turning … In order for the AC Condensor to do its job it must stay as cool as it can. No, if he doesn't want to over heat the engine, he should have AC on at full blow and open the windows. Jolt Feeling in the Steering. After the engine is switched off, the fan may continue to operate at varying speeds (based on the ECM calculated catalyst temperature). About Radiator Fans A radiator fan is a significant part of the automotive cooling system (assuming the vehicle has a water cooled … One fan attaches to the water pump and is driven by the engine through a viscous clutch. Checked the 50amp fuse and it looks good. If you start noticing the heater fan speed varies regardless of the setting, the fan will not turn off when the car is switched off, or the fan will not switch on at all, these are all the symptoms of the Final Stage Resistor failure. 13 Sep 2019 at 5:14 PM #1. tonybolony A mere Chipper. Does the fan turn on? and when overheating I turn off the sensor on the hose and then the fan begins to full power to cool and then the temp is ok that the temperature sensor on the intake hose is not dealt with pre-grateful: April 30, 2019 : … Is radiator burning hot all the way across? Jan 19, 2010 #1 Hi guys, Tried looking on the internet and this seems to be a common problem but no real resolutions to be found. Then start the engine and wait for the temperature to rise. It was an aftermarket made in Taiwan. Posted by kevinowen7 on Aug 24, 2009. Answer: It is possible to do this. I have a 99 323I Manual 5 speed. The issue affects 3 Series cars built between December 2004 and July 2011, meaning E46 (below) and E90 (top) models. The electric fan is activated by means of a power output stage directly on the fan motor. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. The motor control unit activates this power output stage by means of a square-wave signal with duty factors (variable pulse width) between 10 and 90 % thus controlling the various speeds of the electric fan. Reply. The fan controller stopped working. For a better experience, please enable JavaScript in your browser before proceeding. Some vehicles have a separate coolant temperature sensor for the fan… But when I put the heat on full blast I am getting cool to warn air blowing and the electric fan never kicks on. This happened several times. shadrack, May 3, 2013. Discussion in 'E46 M3 (2001-2006)' started by tonybolony, Sep 13, 2019. I checked all the fuses, including the 50 Amp fuse behind the glove compartment, swapped the coolant temp sensor from another 323I to mine and the most imp part, I bought a new fan … Need E46 GURU:Electric Cooling fan question Hi! The relay will typically be activated once the temperature approaches a … You shouldnt be able to.-Extremely Slim possibility is the fan switch is dead. The stock fan clutch cooling setup does a great job on our S54 engines, however sometimes it’s not enough. YES: Engine isnt hot enough or cooling system not bled all the way. That relay controls the fans for the engine. If the fan does run, then the water pump is most likely the culprit. You could do some tests to troubleshoot the cause yourself, like hooking up a volt-meter to the fan-connectors. So you may have to replace the whole fan assembly. I have a manual e46 the aux fan and radiator fan are not on my car though. If the fan receives a false signal, the fan might not turn on, causing the engine to overheat. Check the fuse first. Radiator fan not turning off. Replaced the radiator along with the whole cooling system and its still getting hot, as the fan wasn't turning on. GolfDuck Staff … dont take my word but i THINK the wire colors are brown for minus and yellow plus. Fuse box in the glove compartment BMW E46. The N15 Design E46 M3 Electric Fan Mount is a great way to add a 16″ SPAL electric fan because it’s so easy to install. The electric cooling fan is now controlled by the ECM. I have a 99 323I Manual 5 speed. You are using an out of date browser. Short the two pins at the fan switch. Rule #1 with BMWs: The very second you see any evidence of an overheat warning, you pull off the side of the road, shut off the engine, and call a flatbed. Clicking this will make more experts see the question and we will remind you when it gets answered. While the car is moving at modest speed and there is enough air flow through the radiator, the fan needn't be on. ... 323i: bmw e46..99 model electric fan on radiator does not turn. The issue affects 3 Series cars built between December 2004 and July 2011, meaning E46 (below) and E90 (top) models. The only other place where the engine heat can be taken out is through the heater core radiator. To add another layer to the situation, if your fan blades grenades inside your engine bay you can cause destruction to your hose, radiator, hood and other … No check engine lights present. The easiest way is to use digital fan controllers. Does it … I shut off the engine to cool it down. Almost all modern vehicles rely upon electric cooling fans to pull air through the vehicle radiator to keep the engine cool. Comments: Any idea on how to re wire a relay to the electric fan on a e46? We replaced his expansion tank last week. also think ive a faulty stat ive not changed yet could there be a link? :fencelook: Attached is a nice description of the M54 engine and ancillary systems. i plugged the car again to the computer, tried to activate the fan using the software, didnt work... went to the parts store, got another fan under warranty, it worked for a … I disconnected the cooling temperature … You shouldnt be able to.-Extremely Slim possibility is the fan switch is dead. The belt-driven fan should be turning at some speed all the time if the engine is running and at much higher speed with a hot engine. N15 Design E46 M3 Electric Fan Mount DIY. The electric fan is activated by means of a power output stage directly on the fan motor. -Fan doesnt turn on when car gets hot? Today we bought another electric fan. The fan controller stopped working. I want the fan to run before it gets to 90 degrees. Many of the principles … JavaScript is disabled. You want all of the parameters to be properly met so that everything works in tandem with the other components.