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EF Cooling Fans/Circuit Malfunction 

 

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 Post subject: EF Cooling Fans/Circuit Malfunction
Posted: Sat Dec 18, 2010 9:40 pm 
Parts Gopher
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Posts: 73

Joined: 28th Nov 2010

Ride: EF Futura wagon, BF MKIII Wagon

Location: Brisbane
QLD, Australia

My 95 EF wagon cooling fans drop out of their high speed range at some stage during driving (even when i keep AC on and cabin fan in HI). They drop out once a bit of heat builds up under the bonnet.

My question: What might be the likely cause for the fans to drop out when the AC on/cabin fan in HI condition is present?

I was thinking crook relay? Any ideas?

Replaced:

Waterpump
Thermoswitch (Genuine)
Coolant
Thermostat (Genuine)

Radiator flushed
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 Post subject: Re: EF Cooling Fans/Circuit Malfunction
Posted: Sat Dec 18, 2010 10:02 pm 
Tyre Shredder
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Posts: 326

Joined: 12th Jun 2010

Ride: EL Fairmont

Location: Central Highlands
QLD, Australia

I had a thermo fan relay go on my EL fairmont at about 150000km, only one fan was coming on, temp was climbing at traffic stops. Just followed the gregorys manual process of fault finding with a multimeter and found I had a dud thermofan relay. Got a Narva 40A relay for $10 and it solved the problem......

BTW should have checked the thermo fan relays first up. common problem with EF,EL's due to the high current drawn through them...

Also to test your coolant temp sensor on the thermostat housing, just unplug it while the motor is running the fans should come on full speed. If they don't it''s the sensor or relay not latching....Use a mulitimeter and gregory's manual resistance values to check the sensor is within range.

If you don't have access to a multimeter put the dash in diagnostic mode as per website and you can see the coolant temp sensor values.

 

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Current ride 2007
ML GLX Dualcab Triton 4x4

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 Post subject: Re: EF Cooling Fans/Circuit Malfunction
Posted: Sat Dec 18, 2010 11:42 pm 
Technical Contributor
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Age: 53

Posts: 5589

Joined: 14th Jan 2005

Gallery: 10 images

Ride: 96 XH/97 EL

Location: South Coast
NSW, Australia

Also check out the doco's on here and pull the fault codes from the ECU, all the relays have a code.

 

_________________

96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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 Post subject: Re: EF Cooling Fans/Circuit Malfunction
Posted: Sun Dec 19, 2010 7:30 am 
Parts Gopher
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Posts: 73

Joined: 28th Nov 2010

Ride: EF Futura wagon, BF MKIII Wagon

Location: Brisbane
QLD, Australia

If I start vehicle with AC on and cabin fan in HI position, the fans are on immediately and stay on until I notice the temp gauge comes up. I then have to pull over, visual inspection will confirm fans not at high speed, have to stop the engine, restart and they come on again.

Its not the thermoswitch as I have replaced that and the fans go to high speed if that is disconnected whilst its running.

I just want to make sure the fans stay on when they are suppossed to (i.e. AC on and cabin fan on HI). I can live with that for a while. It runs very cool providing the fans stay on with A/C, usually around the 75-80c mark. Without them it gets up near 100c.

I'll throw some relays at it and see how it goes....
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 Post subject: Re: EF Cooling Fans/Circuit Malfunction
Posted: Sat Feb 04, 2012 6:51 am 
Parts Gopher
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Posts: 73

Joined: 28th Nov 2010

Ride: EF Futura wagon, BF MKIII Wagon

Location: Brisbane
QLD, Australia

finally figured this out....after much trial and error, I discovered the Cam Angle Sensor was not aligned correctly.....I had swapped the motors and just installed the Cam Angle Sensor the way it came out of the original motor..obviously it was not installed right in the original motor to begin with

now correctly aligned, my cooling issues have gone (temp gauge never gets over A in Normal now), the engine torque between 2000-3000rpm has come back, erratic idle issues have dissapeared, fans operating correctly...

the ECU must have been having a hard time trying to stabilise things...
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 Post subject: Re: EF Cooling Fans/Circuit Malfunction
Posted: Sat Feb 04, 2012 9:16 pm 
Parts Gopher
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Posts: 86

Joined: 23rd Dec 2009

Gallery: 16 images

Ride: ford ef2 xr6

Location: melbourne
VIC, Australia

how do you check that the cam angle sensor is aligned properly?
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