Hi,
I noticed my Freelander front wheels spun on some wet grass when manoeuvring the other day. So I'm assuming the 4 wheel drive is not working.
After doing some checks I think the fault is with the Haldex. Does anyone know if the Haldex pump should be running all the time the ignition on/engine is running? because I notice with the ignition on, the pump is not running. If I put a 12v feed to the pump I can hear it running, so I'm assuming its ok. I also checked the feed into the Haldex control unit and it has a good 12v and good earth, so I'm assuming its a problem with the Haldex ECU, or have I missed something.

It's probably only a blocked filter screen on the haldex pump. Has the oil and filter been changed recently?
I've had this issue on Freelander and a VW Tiguan. Take pump out , clean screen, new oil and filter and 4x4 restored. On the Freelander I gad a gearbox fault warning and the terrain response didn't work. The VW had no fault light at all, just an ability to spin the front wheels.


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2014 Orkney grey Freelander SD4 GS.
2004 Zambezi silver Discovery 2 Td5 (Gone)
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I think the pump is ok because when I connect 12v I can hear the pump working.
What I am trying to find out is does the pump run all the time, because I think my problem is the haldex ECU and before I commit to spending money on it, I just wanted to make sure I have done all the correct checks.

Forgot to add no lights or warning messages on dash, and no faults on scanner tool

I am fairly sure the pump should run with the ignition on you should be able to hear it. 2013 FL2 XS.
Defender 90 300 TDi.
Defender 90 300 TDi CSW.
1964 MGB Roadster.
1944 Willys MB "Jeep" with bullet holes. (gone)
17 hand Irish Drought Thoroughbred (mostly lame)
Nagging Old Boiler.

Mahatma Gandhi said if there is an Idiot in power those who elected him are well represented

elvisman wrote:

Hi,
I noticed my Freelander front wheels spun on some wet grass when manoeuvring the other day. So I'm assuming the 4 wheel drive is not working.
After doing some checks I think the fault is with the Haldex. Does anyone know if the Haldex pump should be running all the time the ignition on/engine is running? because I notice with the ignition on, the pump is not running. If I put a 12v feed to the pump I can hear it running, so I'm assuming its ok. I also checked the feed into the Haldex control unit and it has a good 12v and good earth, so I'm assuming its a problem with the Haldex ECU, or have I missed something.

I took mine to Bell recently - re horrid noise up front, no 4WD - thought to be a PTU issue. No alarms showing.

Turned out that the haldex pump was dead (internal short), the PTU was fine and the noise was from NS front wheel bearing.

So it seems that the haldex pump can fail without any alerts showing. Jules

To check 4wd is operating jack one rear wheel off the ground chock front wheels start engine take hanbrake off try and turn the raised rear wheel if it does not turn 4wd is in and working .... if it does turn something is not working pump? Haldex? PTU? 2013 FL2 XS.
Defender 90 300 TDi.
Defender 90 300 TDi CSW.
1964 MGB Roadster.
1944 Willys MB "Jeep" with bullet holes. (gone)
17 hand Irish Drought Thoroughbred (mostly lame)
Nagging Old Boiler.

Mahatma Gandhi said if there is an Idiot in power those who elected him are well represented

You can't test the Haldex is working by lifting a rear wheel and turning it, as it's an on demand coupling. With the vehicle stationery, there's no demand for AWD, so no coupling between the front and rear should be taking place, which means the lifted rear wheel will just rotate when turned. Hyundai Ioniq 5 Ultimate. The family car.
2009 Rimini Red SE TD4. Gone.
2006 Tonga Green i6 HSE. Gone.
Audi A5 convertible, my daily driver.
1972 Hillman Avenger GT, the project.

Well I tried this a few days ago with the engine running lifted rear wheel is locked, engine off rotates freely, 4wd is activated when moving off then goes to 2wd unless loss of traction is detected on front wheels, so will be in when engine running. 2013 FL2 XS.
Defender 90 300 TDi.
Defender 90 300 TDi CSW.
1964 MGB Roadster.
1944 Willys MB "Jeep" with bullet holes. (gone)
17 hand Irish Drought Thoroughbred (mostly lame)
Nagging Old Boiler.

Mahatma Gandhi said if there is an Idiot in power those who elected him are well represented