Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Entwood]

Hitched the tin tent up to the  car and the self levelling has failed to function, pump does not run ... and nowt so far seems to work....

Fuse checked ... OK ... attempts to check voltage input  at the pump .... fail so far ...

Am I right that the rear OFFSIDE suspension arm is the correct one for the suspension ?? near side being headlights ??

With that undone and  at its "lowest" position still no 12v at the pump, just around .5 volt on the 2 centre pins which is a weird figure, outer pins are 0 volts.

Next is, according to Haynes .. relay K19 .. but just where is that !! no indication in the book where to look !

Any one with any ideas please shout out .....

[tunnie]

K19, its a small one to the left of the diagnostic connector in the fuse box under the steering wheel.

[Entwood]

K19, its a small one to the left of the diagnostic connector in the fuse box under the steering wheel.

ta .. 2 little black ones swapped over .. no difference, and finger on both feels the relay "click" but still only .5 volt at the pump ...

[Entwood]

With the sensor unplugged at the rear I get 0 volts on 3 lines and 0.3 volts on one .....

[Entwood]

trying to read Haynes wiring diagram page 12.45... and I'm pretty poor at this side of things ...

track 548 ... power direct from fuse 27 to track 541 and 543

track 541 branch to M22 (pump)  contact C should be 12 volt so possible bad connection a junction X1 (wherever that is ) ??

track 543 through relay K19 also then through X1 to  M22 (pump) contact B.  K19 controlled by K21 (sensor) If K19 pulls in 12 volt should get to contact B also via X1

So if X1 is faulty it affects all parts of the circuit ...

Where is X1 ??

and have I read it correctly ... somehow I doubt it ...   

[Entwood]

perhaps I'm a bigger numpty than I thought ... previous voltages where all measured pin - body earth ....

just tried measuring directly across the pins and I now get, engine running voltages ...

Brown - Red  13.4 volts

Black - White   8.95 volts,

move the sensor to the opposite end so it "thinks" its up to height ...

Brown - Red  13.4 volts

Black - White   0 volts

so .. if 8.95 is the "correct" voltage to pull the pump on ... then the pump is knacked... fair do's

BUT is 8.95 volts the right value from the sensor to pull it in

Contact A goes back into the sensor .. the return for the solenoid, would this be enough to give a voltage drop of 4 volts ??

at least I have power so a replacement pump and sensor asked for in parts section ...

[Entwood]

Hi .. anyone know the answer to the required voltage question?? Replacement used pump has arrived but it doesn't work either .. 14 volts on the pump lines 9.5 volts on the "signal" line with the sensor in the "I'm fully down" position, and the pump does nowt ...

Now stumped....

[Doctor Gollum]

Try the sensor arm fully up

[Entwood]

Try the sensor arm fully up

It is as high as it goes .. telling the system the suspension is as low as it could be .....  (put at the other extreme there is no signal voltage at the plug ...)

[Doctor Gollum]

Engine running?

[Entwood]

Engine running?

yup, without the engine running the voltage is zero ... relay appears to be pulling in as thats when the voltage starts to show

[Entwood]

Further to all the 'dangle berries' above ... even though the "old" and "new" pumps still don't work ... mate across the road has been to offer help and looking at Haynes he saw I was testing across the wrong pins ...  so we've now done it correctly and

Engine running, sensor at its highest point (equals suspension at its lowest) pins A & C 14 volts, Pins B & D   14 volts

Engine running, sensor at its lowest point, (equals suspension at its highest) pins A & C  0 volts, Pins B & D   14 Volts

and that is using 2 different sensors

any one any ideas how to test the pump "off the car" ??

[omegod]

I've 2 good sensors here if the shenanigans persist

[Entwood]

I've 2 good sensors here if the shenanigans persist

Yes please ... I can't believe gstylebaby's is faulty especially as he's convinced it is good, so the only other major bit is the sensor. The one I have in the "box" is not marked as "good" so might well be the faulty one I replaced some 5 years ago and never threw out.

So PM me a price, including postage and how you want paying and I'll have them both, at least I'll then have a "known good" spare I can label appropriately...

[Migv6 le Frog Fan]

If you send 12v direct to the pump does it work ?
If you bypass the sensor and send 12v from the supply to the sensor to the pump does it work ?
If yes to both then sensor is faultyI would think.
If no to one or both, fault lies elsewhere.