Ok this is the low down My 4x4 fault light came on a couple of weeks back i was thinking oh no my TX box has packed up, i took it to my local Vaux garage and they sed it was going low voltage on a pressure sensor (in the TX box) costing 45 squid +vat i think fab and order one right away it takes a couple of weeks arriving after a week my 4X4 light goes out (4x4 still not working) so im thinking the bulb has blown today my sensor finally arrived and got installed but the 4x4 still didnt work furthermore i replaced dash bulb for the 4x4 no difference ( I also checked the old bulb and it works fine) so now im really stuck and clueless i dont even have a fault management light to tell me my 4X4 is knackered now please help if you can.
Thanks for the advice richie ive checked it out but it does'nt apply to me, my 4x4 is defo off 100% certain my light never comes on not even as a test when i turn the ignition on, it has just stopped altogether but the bulb is not blown (triple checked) I pulled fuse 19 to see what would happen ( No change ) light stays off no matter what i checked other fuses with a DMM to check if it was a connected fault all fuses ok.
THIS IS THE BIT WHERE I NEED HELP NEXT
I checked the voltage accros the terminals for fuse 19 with the fuse removed !!!!! Nothing, no voltage with the ignition lights on or off so now im thinking its an ECU fault or a relay somewhere could someone with a 4X4 please check across their terminal for fuse 19 (fuse removed) and see what voltage should be there (i assume 12V) and also observe the polarity IE top pin +ive or pin closer to footwell +ive
Check Fuse 2 as well. The 4WD ECU takes it power thru fuse number 2 (19 is for the solenoid valve only and doesnt power the ECU). If fuse 2 has failed then it wont get any power and the system wont work.
Not sure what else runs off fuse 2 as all the info is at home and I am at work just now.
Ok i think i found it i drive a face lift model calibra so they might have changed it around a bit i think mine is a light grey box under the main ECU prettymuch sitting on the floor attached to the inner wing its gotta be that cos if it aint there aint much else there
mine says KIEKERT on it and is part no 90506484 is this any clue BTW i took it out and my Central locking stopped working
This is really Killing me off im begining to think that one of the previous owners had it moved or something (maybe to install the alarm ) cos it aint where it supposed to be .
I pulled the Flap for the fuse box down , then unclipped and pulled towards me the bottom of the grey fuse panel and then slid it off the top runners i pushed it to one side and had a good look around i then undid the 3 big button clips for the trim in the roof of the footwell and looked furthe but to no avail all i found were a bunch of large colourful relays (they look like relays anyway)
On later models it's further down to where it used to be.
Open your fuse box, pull it forward, look to the right & you'll see a black plasic box with a yellow connector on.
If you still can't see it, look at your dash you have about 2 inches between the fuse box cover and the side of the dash it's mounted in there. Not easy to get at to remove but you should be able to disconnect the connector. Check your getting 12v betwwen the black and brown wires with the ignition switched on.
Please do not take this personally but are you sure you have tested for a supply carefully. The way you have described testing across the fuse holder will not show a voltage present. You will need to test from the live side of the fuse to earth or any brown wire you can find. I know when a problem gets me my head is up my *rse half the time and frequently overlook stupid details.
Thans Everyone i finally managed to find it , it was right where Chris said it was its a ba*tard to get to though I* havent had time to try it out yet but at least i know where
Johann not meaning to be offensive but of course measuring accros the Fuse terminals (ie with fuse removed) in a DC circuit will give you the full voltage present in that circuit otherwise it would be pointless having a fuse there.
Continue reading if you want to know why !!!
A fuse blows when its max current (Amp rating) is exceeded this is because the diffrence in power between the 2 terminals rises above the norm what this also means is that under normal conditions you can measure accoss the fuse terminals to find what voltage is present in the circuit infact with the fuse being where it is (ie in series with the power supply ) you can measure the current actually drawn through a circuit via the fuse terminals
the bottom line is see for yourself check it out on you car with a DMM