Hi my Motor/coolant fan is only running sporadically on stage 2 otherwise it’s not running at all.
Is there a way to replace the resistor? Or do I have to replace the complete fan? Or is there anything else I should check first?
thanks

 

The ECU determines the fan speed.

Is a cooling fan fault code stored in the ECU?

Is the coolant level low in the reservoir?

Did you recently do any work on the cooling system?

 

there are no fault codes stored in the ecu and coolant level is full.

I’ve worked on the cooling system two years ago. It’s not that the fan is not working it’s only working on high speed. So it kicks on for apx 3 seconds goes off for 15 seconds before it repeats

 

Try bleeding the cooling system.

 

It could be many things; there are two independent fan electrical circuits. Check both of your fan fuses first. Then check your first stage fan relay. Also, there is a resistor in the motor assy for the 1st stage fan. If that resistor fails, it could prevent the fan from working.

 

Thanks,
I've checked by manually turning on Fan Stage 1 and Stage 2 that stage 2 works perfectly fine. Stage 1 clicks in the relay but it does not turn on.
Fuses are both ok, I've switched the relays of the fans, same issue. So I guess it's the resistor. Where do I find that one? Is it in the Fan? I only see 2 wired going into the fan, is it pulling ground from somewhere else?

 

The first stage fan relay can click, but that doesn't mean it's sending out power to the fan.

Also, according to the schematic, you should have three wires going into the fan motor, stage 1 power, stage 2 power, and ground.

IM me your VIN; we need to make sure we're looking at the right schematic.

 

Hi.
There are lots on this but.......
2011 n14 manual JCW r56.
My slow speed fan doesn't not come in at all. With AC selected...without AC.
I can power up the fan directly at the plug......when 12 v is applied...slow and fast speed works.
I have a JCW . It has 2 relays and a 3 wire fan and a boost gauge and temp gauge. .
Temp gets to about 110deg c. And high speed comes in.
I checked my AC. There is no gas.
The temp gauge and sensor works and thermostat opens and coolant flows.
All fuses and relays work.
Suggestions.

My AC does not work. I assume the two are connected?
Fan slow does not work. Fault Code 2f3f

 

Which MINI are you working on? Justa, S?

 

Hi.
The thread is labeled R56 JCW. Fan stage 1 not working?
JCW are all s?

 

Yes I understand, but you never know who's going to chime in.

 

Right. Do you have something to say about the issue or is this one of those posts where someone has chimed in with nothing to offer?.
People who chime in with absolutely NFI will get a ****ton (metric?) of sarcasm.

 

Have you scanned the car? Any faults?

 

2f3f.

 

What year is your JCW?

 

2011 n14.

Manual.
Non run flats.
Leather seats.
Red trim.
Factory AC.

 

Janson, I can't find that 2F3F code in Alldata. Please scan the car under "global" OBDII, and let us know what P codes (if any) come up.

 

I have a generic scan tool.
Comes up as that. With note dme electric fan, activation power stage 2.
I have ista plus. Can connect to r53 but get no connection to r56 with k d can cable with switch in either position.
Automatically finds r53 vin and links to ecus in r53.
But not r56.

 

[Code has gone. Hasn't returned for a few days now.

Symptoms remain.

Thoughts?

QUOTE=JasonJasonJason;4690284]I have a generic scan tool.
Comes up as that. With note dme electric fan, activation power stage 2.
I have ista plus. Can connect to r53 but get no connection to r56 with k d can cable with switch in either position.
Automatically finds r53 vin and links to ecus in r53.
But not r56.[/QUOTE]

 

I can bridge both fan relays and fan runs on slow and high speed. .
​​​

 

Possible DME issue?

 

​​​​​​Don't think so.

 

I'd look at the connections to and from the power distribution box in the schematics above. Of course, the first thing to check are the two associated fuses (40A and 50A). If they're good, then you need to find out if the low speed relay is being commanded on or not - should be able to do that with the plug disconnected and probing the relevant pin (8 or 11, whichever corresponds to the low speed circuit). If there's no signal (battery voltage) with the A/C on (or at least in a condition that should trigger the low speed relay / fan) then work back to the DME or whatever is behind the power distribution box. But if the signal IS there, it's down to the low speed relay being bad, or a bad connection between the low speed relay and the fan motor. Cable, plug or bent pin.

 

Consider checking for battery voltage at OBD2 pin 16 and ground at pins 4 & 5 of the OBD2 connector. A problem at those pins would prevent your scan tool from connecting with the Mini ECUs.