newbie needing info

[markyboy]

hi all new member here from the uk with a small problem, i work for a subaru dealership and we have got in an svx with the dreaded 4ws light on. now we never had this setup on our spec so we have no info on it at all. we have managed to get a code for the rear wheel speed sensor but we can't seem to link any part of the 4ws to a sensor that can read the wheel speed. does anyone have any sort of workshop manual that gives wiring diagrams or an explanation of how test to system?

[Trevor]

Originally Posted by markyboy

hi all new member here from the uk with a small problem, i work for a subaru dealership and we have got in an svx with the dreaded 4ws light on. now we never had this setup on our spec so we have no info on it at all. we have managed to get a code for the rear wheel speed sensor but we can't seem to link any part of the 4ws to a sensor that can read the wheel speed. does anyone have any sort of workshop manual that gives wiring diagrams or an explanation of how test to system?

It is interesting that as a dealership you are seeking help here, rather than from Subaru.

As far as I am aware the 4ws system has no connection with a rear wheel speed sensor. But I do not have any sort of wiring diagram to confirm this.


The system is completely stand alone and derives input from a potentiometer mounted to the base of the steering column. The motor is a Mitsubishi Electric type 4WS - 88141PA000. The controller in the boot, is also Mitsubishi 4WS - 88121PA000. Connector CNI is motor power and is permanently energised. CN2 is the sensor inputs and control voltage. Motor switching is by FETs within the controller and these are stall current protected.

The above is all the information I can provide, which could be of assistance.

[markyboy]

subaru can't help as we never had this system so there is no info on it also there is the liability side that they won't help us incase something goes wrong!

what are these cn1, cn2, fet are they plugs? i found the plug for the motor with a big thick black wire and red wire and then 2 thinner wires, if the black and red are permanently live what do i do to the smaller wires to get them to move the motor?

[Trevor]

Originally Posted by markyboy

subaru can't help as we never had this system so there is no info on it also there is the liability side that they won't help us incase something goes wrong!

what are these cn1, cn2, fet are they plugs? i found the plug for the motor with a big thick black wire and red wire and then 2 thinner wires, if the black and red are permanently live what do i do to the smaller wires to get them to move the motor?

I sympathise with Subaru under the circumstances.

CN indicates a connector/plug/socket. Surely it is obvious that the smaller wires constitute a control circuit. With due respect, I would suggest that you get someone with the required experience alongside.

[b3lha]

READ THIS:

http://www.geocities.com/jamsvx/trans4ws.html

[markyboy]

i know they control it but how? thats what i'm trying to find out is it a voltage an earth or duty ratio? if i know how it works then i can test it