4lo not engaging

Titan360 said:

Unfingbelievable...the NPS was just unplugged this whole time.....4Lo works perfectly now, probably could have saved myself $130 for the new transfer switches I probably didn't need (will keep the old ones as spares) by looking at that first.....



Cheers Fuzzylogic, looks like I owe you a beer for that if your ever in Perth...

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fuzzylogic said:

You're welcome, mine did the exact same thing, I also bought transfer case switches, before I figured it out. My connector had managed to only just wriggle loose.. Weird thing is, when that sensor fails, you lose cruise control, but keep low range, when it's unplugged, no low range, but you have cruise...

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Titan360 said:

I've got the same problem with my 09 D40 ST-X, I've checked both brake switches and they work fine, I've replaced all 3 transfer switches and contact cleaned all the plugs for the transfer switches and the servo and still no 4Lo.

When I switch to 4Hi the servo on the back of the transfer case makes a noise and it engages, also the 2 black relays under the bonnet click when engaging and disengaging 4Hi, but when doing the same with 4Lo there is no noise from the relays or the servo.

Is there just the 2 black relays for both 4Hi and 4Lo or are the black ones just for 4Hi, are there different ones for 4Lo?



How did you end up diagnosing the broken wires?

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Dazza63 said:

Hi folks new hoping to get valuable intel from you all at some point. I know probably been asked and answered hundreds of times but I am having trouble on my D40 the 4Lo light flashes but doesn't engage I have removed cleaned switches on gearbox put it back in no different. 4 high engages. If you dont want to answer please point me in right direction of posts already up if any thanks. I backed it out driveway and put in 4HI drove about 5 mtrs nd it just sort of pulled up. I had to disengage 4HI and back up to get moving again. Any ideas. If none do you know where I can buy new switches from apart from Nissan. I removed and cleaned the 3 of them on the box but no difference.
Thanks for any help or info you may give...Or if you have any tricks to try.

Click to expand...

Dazza63 said:

Hi folks new hoping to get valuable intel from you all at some point. I know probably been asked and answered hundreds of times but I am having trouble on my D40 the 4Lo light flashes but doesn't engage I have removed cleaned switches on gearbox put it back in no different. 4 high engages. If you dont want to answer please point me in right direction of posts already up if any thanks. I backed it out driveway and put in 4HI drove about 5 mtrs nd it just sort of pulled up. I had to disengage 4HI and back up to get moving again. Any ideas. If none do you know where I can buy new switches from apart from Nissan. I removed and cleaned the 3 of them on the box but no difference.
Thanks for any help or info you may give...Or if you have any tricks to try.

Click to expand...