Question about 2002 Mini Cooper

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2002 Mini non S cooling fan not working, No power at the relay on terminal 30 but has power at 87

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Hello there, i think i can solve your problem , check fuse 3 under the hood it should be a 5 amp if its not the check the closest 5amp to that, check to see if it blown if it is blown then your power steering fan is now working as well as the cooling fan, if that is the cause you will need to replaced the power steering fan as well as the 5 amp fuse, and also in addition you will need to sepate the power steering fan from the cooling fan. Mini parts sells a harness to separte the 2 fan

Posted on Apr 06, 2011

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Testing the cooling fan electrical circuit would be the place to start ! At the relay or where it plugs into in the fuse relay box > If you look on the bottom of the relay you will or should see four sets of numbers 30,87 & 85,86 . Take a jumper wire an jump pins 30 & 87 . The fan should run . Check for B+ power at those two pins , one should have B+ voltage ! The other goes to power the fan ! There are videos on you tube for trouble shooting such problems . An you can find free wiring diagrams at www.bbbind.com Good luck happy hunting an stay dirty

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I've got a mini one 2002 cooling fan dose not work unless I turn the a/c on if I don't turn the a/c on it will Overheat


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Feb 3, 2014 - This describes the top seven Mini Cooper repair problems owners may ... out the cooling fan and other related parts while the vehicle is apart. ... MiniCoopers aren't the most expensive cars to purchase new, and with .... Your article was a great read and at almost 60K miles , I've been through a few of them.

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What does this mean?????????????


P0480 Cooling Fan Relay 1 Control Circuit OBD-II Trouble Code Technical Description Article by
don.jpg
Don Bowman
ASE Certified Automotive Tech

Cooling Fan Relay 1 Control Circuit
What does that mean? This is a generic powertrain diagnostic trouble code (DTC), which means it covers all makes/models, 1996-newer. However, specific troubleshooting steps will vary depending on the vehicle.
If your vehicle's check engine light comes on and after pulling the code you find a P0480 displayed, if refers to the engine cooling fan circuit. It is a generic code applying to all OBD II (on board diagnostics) vehicles.
While you are driving, air in sufficient quantity is passing through the radiator effectively cooling the engine. When you bring the car to a stop no air is passing through the radiator and the engine begins to increase in temperature.
The PCM (powertrain control module) senses the increase in engine temperature through the CTS (coolant temperature sensor) located near the thermostat. When the temperature reaches about 223-degrees F (value depends on make/model/engine), the PCM will command the cooling fan relay to turn on the fan. It does so by supplying the ground to the relay.
There is a problem within this circuit causing the fan to fail to operate allowing the engine to overheat while sitting still or driving at a slow speed. When the PCM attempts to activate the fan and senses the command and the result do not match, the code is set.
NOTE: P0480 speaks of the basic circuit, however codes P0481, and P0482 relate to the same problem with the only difference is they relate to the different fan speed relays.
Symptoms Symptoms may include:

  • Check engine light (malfunction indicator lamp) illumination and code P0480 set
  • Engine temperature will rise when the vehicle stops and idles
Potential Causes The causes for this DTC may include:
  • Faulty fan control relay 1
  • Fan control relay harness is open or shorted
  • Circuit electrical connections poor
  • Faulty cooling fan 1
  • Faulty coolant temperature sensor
  • Fan cooling fan harness is open or shorted
  • Cooling fan circuit poor electrical connection
  • Intake air temperature (IAT) failure
  • A/C selector switch
  • A/C refrigerant pressure sensor
  • Vehicle speed sensor (VSS)
Diagnostic and Repair Procedures It is always a wise idea to look up the technical service bulletins (TSB) on your particular vehicle to see what type complaints have been coming in to the dealer service department related to this code. Search using your favorite search engine "technical service bulletins for ....." Look up the code and the type of manufacturer recommended repair. This is also a good idea before buying a vehicle.
Many vehicles will have two engine fans, one for engine cooling and the second for cooling the air conditioning condenser, and additional cooling for the engine.
The fan that is not in front of the air conditioning condenser is the main cooling fan and the one to concentrate on initially. Additionally, many vehicles have multi-speed fans requiring as many as three fan speed relays for low, medium and high.
Open the hood and do a visual inspection. Look at the fan and make sure there is no obstruction in front of the radiator blocking airflow. Spin the fan with your finger (make sure the vehicle and key is off). If it will not spin the fan bearings are shot and the fan is bad.
Check the electrical connection at the fan. Pull the connector apart and look for corrosion or bent pins. Repair if necessary and use dielectric grease on the terminals.
Open the fuse block and inspect the cooling fan relay fuses. If they are good pull the cooling fan relays out. The bottom of the fuse block lid will usually indicate placement, but if not, look in the owner's manual.
The vehicle's PCM's function is to act as a ground to operate components, not to supply power. The fan relays are nothing but a remote light switch. The fan as well as other apparatus draws too much amperage to be safe in the cockpit, so it's kept under the hood.
A constant power supply from the battery is present on a terminal in each of the relays. This one turns on the fan when the circuit is closed. A switched terminal will be hot only when the key is on. The negative terminal in this circuit is the one used when the PCM wishes to active the relay by grounding it.
Look at the circuit diagram displayed on the side of the relay. Look for the simple open and shut circuit. Verify the battery positive terminal in the relay block with constant power. The opposite side goes to the fan. Use a test light to find the hot terminal.
Jump the battery terminal to the fan harness terminal and the fan will operate. If not, disconnect the fan connection at the fan and using an ohmmeter check the continuity between the fan side of the relay terminal and the connector at the fan, If there is continuity the fan is bad. If not the harness between the fuse block and the fan is faulty.
If the fan operated, check the relays. Look at the side of the relay for the switched power terminal or just turn the key on. Check the terminals for an additional power terminal and look where it would be on the relay.
Jump the battery plus terminal in the first test with this switched terminal and place an additional jumper from the negative terminal on the relay to ground. The switch will click on. Use an ohmmeter to test that the constant battery terminal and the fan harness terminal have continuity meaning the circuit has closed.
If the circuit has not closed or the relay has not clicked, the relay is bad. Check all the relays in the same fashion to be sure they are all working.
If there was no switched power at the relay, the ignition switch is suspect.
If they prove to be good, check the CTS with an ohmmeter. Pull the connector off. Let the engine cool and put the ohmmeter on the 200,000 scale. Probe the sensor terminals.
The reading will be about 2.5. For precise readings consult a service manual. Accuracy isn't necessary since all sensors may be different. You just want to know if it's working. Reconnect it and warm the engine.
Shut the engine down and pull the CTS plug again. Check it with the ohmmeter, there should be a big change in resistance, if not the sensor is bad.
If the above procedure could not find a failure, the probability is that a poor connection to the PCM or the PCM itself is at fault. Do not go any farther without consulting your service manual. Disconnecting the PCM could cause loss of programming and the vehicle may not start unless towed to the dealer for reprogramming.

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1 Answer

Where is the fuse for the cooling fan on a 94 cavalierz24


There is a fusible link which supplies power through the cooling fan relay . the fusible link you want, plus four others are located on the battery cable terminal on the starter solenoid ! the one you want is blue . There are two gray an two more colored rust . Do you know where the cooling fan relay is ? In the under hood fuse / relay box. On the side of the relay should be a diagram , or on the bottom it should be marked 30,87, 85,86 .If you find pin 30 at the relay socket an test with volt meter it should read battery voltage. If not take the fusible links off the starter an with ohm meter test fusible link end to pin 30 at relay socket .If open or shows OL you have a open circuit ! First I would try jumping battery power to the fan it self . These fans do ware out ! Radiator Cooling Fan Motor How to Test and Replace

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2 Answers

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The cooling fan is controlled by the PCM via a couple of relays. Try swapping the cooling fan relays and see if the fan starts to work. If that doesn't work than you will likely need a scan tool to determine if there is a fan request from the PCM.

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1 Answer

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1 Answer

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On the relay you should have 12 volts at 2 slots terminal 30 has power all the time terminal 86 has power when then computer tells the relay to turn on fan, for cooling or a/c, terminal 85 is ground(-) for the 86 terminal to energize the relay to send 12volt from terminal 30 thru relay and out terminal 87 going to fans, sounds to me like computer not getting the signal to relay, you did get for blow fuse? and does fans come on with a/c on?

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1 Answer

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1 Answer

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2993 dodge durango could you should me a ddiagram of thepdc so iwllknow where the relay is

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