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4ws problem

 
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Old 02-20-2009, 05:06 PM
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Icon7 4ws problem

yeah just wondering my 4ws light is on and of course its on for a reason....my back wheels dont turn... could this be from broken or not working wheel sensors? or what is the problem??? thanks a billion guys
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Old 02-20-2009, 05:53 PM
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Re: 4ws problem

It would be beneficial to pull the code.
http://forums.ntpog.org/showthread.php?t=73
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Old 02-20-2009, 06:01 PM
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Re: 4ws problem

ya no doubt i cant really do it right now bc the car is in the shop...but i guess ill just ask them to run a diagnostics on it
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Old 02-20-2009, 06:09 PM
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Re: 4ws problem

Well if it is in the shop for a broken wheel speed sensor the 4ws will disactive. The 4ws should reactive if a new WSS was put in, might want to reset the 4ws computer just to make sure.
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Old 02-20-2009, 06:18 PM
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Re: 4ws problem

actually its in the shop getting a new motor put into it...i would have done it but dont have the place to do it bc i live in an apartment complex :( and i will ask if they will reset the comp to see if it works than... bc when i actually drove the car before the engine went the 4ws would come on and stay on than i would turn the car off and when i start it back up again it would be off again so i dont noe what it is....weird
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Old 02-20-2009, 06:34 PM
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Re: 4ws problem

Sounds like the usual relay in the computer, I had the same problem. When you get it back from the shop take a look at the insides of the 4ws computer. HT deleted the tread that explained how to do the re solder with pictures.
I would still pull the codes if you can once the engine swap is complete.

sean1121 is the expert on 4WS.
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Old 02-20-2009, 07:04 PM
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Re: 4ws problem

ok cool where exactly is the computer for the 4ws located?
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Old 02-22-2009, 10:03 PM
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Re: 4ws problem

Quote:
Originally Posted by AmericanManiaK View Post
ok cool where exactly is the computer for the 4ws located?
Behind the rear left seat. I have a 4ws ecu taken apart right now, if you want I can take some pics of where you need to re-solder on the board as soon as my camera batteries charge back up??

Ohh and here is some instructions copied and pasted from HT

The solution is to resolder these broken points inside the unit.

1. Disconnect battery
2. Remove 4WS unit from car (before to get access you have to take off left rear seat and rear moulding inside trunk): disconnect 3 (If I remember well) connectors, 1 or 2 grounds, remove metal cover, and finally remove the unit.
3. Open 4WS unit (6 screws) and carefully put the cover (there is an electronic board connected with one electrical stripe) on the side. I used a big large book to put the cover on and not to brake the stripe. Finally you will have cover on the left side (laying on the book) and open 4WS unit on right side.
4. Remove internal metal cover you will see on the right side (some screws) and take it off.
5. You will see a lot of electronical (and electromechanical) parts inside. There are two black boxes (about 1 cm x 1.5 cm) little under the center of the unit. These boxes are 2 small relays. The problem is there!!! , but on the other side of electronic board, so next step is....
6. Remove the main electronic board from the box: remove all screws that fix the board to the box and other components: I am unable to say you exactly how many of them you have to unscrew - I just don't remember, but you will see yourself what is keeping the board in place. Also it is necessary to unscrew 8 big transistors from box (serving as radiator).
7. When the board is unscrewed, put some protecting paper (ex. newspaper) on the cover board laying on the book and carefully extract the board from aluminium box. Put it on the newspaper with solderings side upper.
8. These 2 relays are soldered 4 or 5 points every of them. These are big solderings. I took a magnifing tool (don't know exact english name - zoom ???) and carefully watching the relays solderings I considered ALL of them were broken.
9. Resolder all relays points and mount the unit.
10. After reputting it in the car problem's GONE!!!!
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Old 02-23-2009, 02:36 AM
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Re: 4ws problem

K here's heres some pics of how to get into the 4ws ecu, red circles means screws that need to come out, I circled the relays and relay solder points in blue.










Alright there are 5 solder points that need to be re-soldered for each relay as you can see here in the last pic.
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1992 Prelude si 4ws H22A swap
WingsWest Big Mouth Kit,Shaved Handles,
emblems, Stock si wheels atm, Tokico Blues,
Tein lowering springs, MSD Cap
and coil, NGK IRIDIUM IX Spark Plugs, NGK Wires,
6000K Hid's,5 speed swap, fidanza 8lb flywheel,
Walbro 190lph fuel pump, Vtec front brakes,
Powerstop drilled/slotted rotors,
Powerstop ceramic pads, 70mm OP Throttle body
Vibrant StreetPower Axleback

1993 Impreza
RIP 1990 Nissan 240SX Coupe w/redtop SR20DET
2007 Subaru Forester
1995 Ford Ranger
!990 Integra DA
1951 Ford Hardtop
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Old 02-28-2009, 04:06 PM
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Re: 4ws problem

ok sweet thanks alot this will really help!!!
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Old 04-13-2014, 11:02 AM
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Re: 4ws problem

My 4ws isn't working either! I have a 1992 prelude si . The car has been parked and was working before I parked it. I checked now and it dowse work. I still haven't driven it but no 4ws light goes on. Any suggestions ?
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