Thread: 1993 EAS fuse??

Originally Posted by roverv8

Ok had a bit of look
Maxi fuse ok, light flashes on the up button, center button lights up when pressed.
there is a clicking noise coming from the steel box under the drivers door which i think houses the valve block.
Im hoping for something simple..
how do I access the stuff inside, does that steel box drop down?

G`day ,

the click may be a solenoid or the pump .

If they are still flashing and working when pushed , that`s a good thing because it hasn`t hard faulted as yet . When hard faulted the lights go solid .

Yes , valve block and driver ( which will be one unit on yours most likely , next model is 2 seperate units like a P38a ) also the compressor is there .

The box unbolts ( 4 bolts ) and will hang down but the wiring and air hoses will have pressure put on them if you don`t have something the right height to sit the box on .

First though , i`d suggest you try jumping the ECU .

If you look under the drive seat you`ll find 2 ECUs the top 1 closest to the seat base is the EAS ECU . There is a panel where you heals would be if sitting in the seat and you moved your feet to the seat base ( unclips )

A piece of wire , with 2 bare ends , house power , single strand is good , black .

With the key out of the ignition unplug the ECU ( key in and on will hard fault )

Jump pin 1 and 8 and the compressor should run .
Pin 1 is power . ( try with a test light )

You`ll see there are 2 rows of pins in the plug , one is longer than the other

The longer row is Pins 1 to 18 .

The shorter row is Pins 19 to 35 .

Pin 1 is closest to where the wires enter the plug in the longer row .

Pin 19 is closest to where the wires enter the plug in the short row .

The plug unclips from the ECU the side the wires are .

Let me know if the pump runs , if it does i`ll give you the pins to put air into and out of each Bag/corner ETC and that way you can check what the valve block is doing , if you like .

Originally Posted by roverv8

ok, some progress
Helps if 1 looks at the correct plug.....
jumping pin 1 & 8 makes the clicking noise from the steel box, like it does when car is running & doors shut
obviously there's a compressor issue, but what im yet to find out.
Is it easy to remove & are they expensive??

G`day ,

easy enough to remove the pump , mounts are a bit fiddly .

The manual will say to remove the whole box and disconnect everything but if the dryer is undone and moved out the pump can be removed .

First you could try jumping the relay wires , the yellow relay near the maxi fuse , pin 30 and 87 and see if the pump runs , doing this bypasses the thermal cut out so if left to run too long the pump will cook .

As is , no need to plug the ECU back in .

2nd Ed ....... And this Bit is getting Ahead of where your up to .

If you remove the pump and want to test it check for continuity between the black and green wires and only put positive 12v on the green wire and negative for the black .

Don`t put power on the orange wire or you will loose the thermal cutout .

The pumps are rebuild able so are the motors if the parts can be got .

The actual pump is unlikely to stop the motor .

The motor is like most , it uses brushes , it has a roller/ball bearing on the pump end and a bush mounted in a tin holder on the other end .

If the reason is no rotation of the motor it may be that the brush holder has fallen to bits or the brushes are worn out ETC .

To take motor apart , the 3 small rivets at the bush end need to be drilled out ( to be replaced by small self tappers or similar ) if not and forced apart the bush holder will be stretched and won`t hold properly .

If you find it beyond service and you can`t locate a classic pump , even though they are slightly different a P38a pump can be used but because they have a motor that is a little longer there is a need to make one new mount the other mount is the same , also the classic has 4 mounts and the p38 has 3 mounts .

The cylinder heads also need to be swapped because of the different uses of filters and their connections ETC .

3 ......... if you don`t know , to disconnect the air pipes just push the metal collar in and pull the pipe out .