Toyota Hiace Super Custom Owners Forum

Anything Toyota Hiace related
 
HomeHome  PortalPortal  GalleryGallery  FAQFAQ  SearchSearch  RegisterRegister  MemberlistMemberlist  UsergroupsUsergroups  Log in  

Share | 
 

 4wd issue

View previous topic View next topic Go down 
AuthorMessage
Moorad23
New Member
New Member


Number of posts : 3
Home City : South Lake Tahoe
Registration date : 2016-12-25

PostSubject: 4wd issue   Sun Dec 25, 2016 12:07 pm

First post, hoping someone can help shed some light.

My Hiace: 1991 manual, 4wd manual locking hubs, 3L
Issue: I was driving along and noticed the 4wd push button was depressed unbeknownst to me. I thought it odd as I was sure I didn't press it (I blame it on my girlfriend 😆) . Who knows how long I had been driving with that button pressed in. When it finally came time where I needed 4wd, locked the hubs, pushed the button, and nothing. No green light AND the hi / lo shifter isn't moving (stuck in forward position; hi 4). Afraid for the worst but want to hear thoughts before I stress to much. Thus far I have checked the fuses, played with the vacuum hoses, and tried to engage and then drive forward and or reverse a bit. Thank you!
Back to top Go down
View user profile
Hiace4wd
Hiace Master
Hiace Master
avatar

Number of posts : 476
Home City : Netherlands
Model and year : 1994 Toyota Hiace 4x4 DIY camper
Registration date : 2016-02-01

PostSubject: Re: 4wd issue   Tue Dec 27, 2016 10:19 am

Well, it could be the button is broken? Have you tried to measure if there is any contact through the switch if it is pressed?

If you have your girlfriend sit in the car and push the button a couple of times (with key to ON, but engine not running yet), and you go under the car, you should hear the actuator clicking. You can see where it is, it is a flat square box with some vacuum tubing on top. If you don't hear it clicking, try it with running the engine.
By clicking I really mean the actuators which should sound like a relay clicking. The "cloink" sound you get when it goes into 4x4 should be noticeable while inside.
(You could also disconnect the vacuum tubes to the gearbox, so you should at least here an air sucking sound when the button is pressed)

You could also measure the plug on the actuator. But I don't know if it is switched on getting 12V or not, or if it is switched to ground.
Back to top Go down
View user profile
Moorad23
New Member
New Member


Number of posts : 3
Home City : South Lake Tahoe
Registration date : 2016-12-25

PostSubject: Re: 4wd issue   Tue Dec 27, 2016 5:02 pm

Ok I measured the button which is in working order and also had GF sit in the van and press button. I AM hearing the click so maybe can rule out the actuators.
Back to top Go down
View user profile
Hiace4wd
Hiace Master
Hiace Master
avatar

Number of posts : 476
Home City : Netherlands
Model and year : 1994 Toyota Hiace 4x4 DIY camper
Registration date : 2016-02-01

PostSubject: Re: 4wd issue   Tue Dec 27, 2016 5:16 pm

Ok so next step is your vacuum. So is braking functioning normally? No other dashboard lights indicating an issue?

Perhaps you can disconnect the tubes between actuator and gearbox to feel if it is sucking air.

the vacuum tube going to the actuator starts at the alternator/vacuum pump, runs down the body to the back. Perhaps it is clogged or it is bend/under high angle so no air can get through.

Did you ever use 4x4? Has it ever worked?
Back to top Go down
View user profile
TwentyOneThirtyFive
Been here a while
Been here a while
avatar

Number of posts : 191
Home City : Hertfordshire, UK
Model and year : Super GL Camper (Vantech), 2.8D 4wd, 1995
Registration date : 2016-08-04

PostSubject: Re: 4wd issue   Tue Dec 27, 2016 7:41 pm

Mine (a 94ish) has no dash light when 4wd is engaged. Also, my hi/lo lever is very stiff.

I had to get mine stuck in 2wd to prove to myself that 4wd was working ok Smile

As as aside, I'm not sure what damage could occur running with 4wd engaged, but with the hubs freewheeling? The front driveshafts will be rotating, but with no load on them?
Back to top Go down
View user profile
Moorad23
New Member
New Member


Number of posts : 3
Home City : South Lake Tahoe
Registration date : 2016-12-25

PostSubject: Re: 4wd issue   Mon Jan 02, 2017 10:49 pm

Thanks for the responses so far.

Concerning the vacuum. Braking is functioning normal with no dash light indicators. I have pulled the vacuum lines off and there seems to be suction although not super powerful. The 4x4 has worked before, prior to the accidental button press. I accidentally broke the small plastic male part where the tube fits onto. DOH. But don't think the vacuum is the issue.
Back to top Go down
View user profile
Hiace4wd
Hiace Master
Hiace Master
avatar

Number of posts : 476
Home City : Netherlands
Model and year : 1994 Toyota Hiace 4x4 DIY camper
Registration date : 2016-02-01

PostSubject: Re: 4wd issue   Tue Jan 03, 2017 10:58 am

Well, there is a small vacuum tank near the actuators. When the engine has run for a small time, it should have quite some build up of vacuum power. It should be noticeable when you pull the line.

What you could do is swap the vacuum lines, so I think it should enable 4wd even though button is not pressed. The only way you can verify that the 4wd is working then is to put it into low gearing.
Always drive a couple of meters to make sure it has a chance to enable it.
Another test is to hook it up directly (bypassing the actuator)

I think you (or with a mechanic) need to verify that the vacuum part is working correctly.
Because the next step is removing transfer case and check internals. Although you could try to replace the oil first.
Back to top Go down
View user profile
Sponsored content




PostSubject: Re: 4wd issue   

Back to top Go down
 
4wd issue
View previous topic View next topic Back to top 
Page 1 of 1
 Similar topics
-
» Bill O'Reilly on the black / race issue.
» The Big Issue
» Log In Issue
» issue-about-navbar-image
» forum-directory-issue-forum-not-appearing-on-list

Permissions in this forum:You cannot reply to topics in this forum
Toyota Hiace Super Custom Owners Forum  :: Hiace Mechanical Matters :: GREASE MONKEY !!! (sorry couldnt resist its a BF2142 thing)-
Jump to: