One thing at a time ma boy!
indeed, don’t want to start doing jobs here there and everywhere, lol
Disco 3 (LR3) P0046-00 (28) Error / hopefully resolved
- Thread starter gstuart
- Start date
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indeed, don’t want to start doing jobs here there and everywhere, lol
- Posts
- 12,099
- Location
- Sud ouest France !
You just need the colors and wire pin numbers.
that’s what I’m hoping I can do, got a full wiring diagram so can see I’ve got 5 x wires on the turbo actuator and the colours on reading the wiring diagram
as always just a bit tight as need to lift the wiring loom out the way in order for me to gain access to the 3 x connectors right at the back
If I’m reading the wiring diagram correctly it looks like the Map sensor goes into the same terminal on the ECM as the turbo VGT + actuator
also have some thin back probes for my multimeter which will be handy , interestingly I found the post where the battery ground connects to, right at the back of the fuse box
thks again
think the hardest bit will be identifying the pin letters and numbers on the ECM as see the wires go into the 2 x right hand ECM connections
also as there’s 3 x ECM connectors I don’t know which one is which as on the wiring diagrams there’s
C0411
C2518
C0872
but no hardship if there’s some wires that are use the same colour coding as can very easily just move my multimeter probe to each one
I’m so grateful to u and can’t begin to say how much I appreciate it , thanks so much
- Posts
- 12,099
- Location
- Sud ouest France !
Don't forget to unplug the map when you go to do a cont test. Also cont check the map connections to the ecu in the same manner.
awesome as must admit wouldn't have thought of that , bless u as that’s extremely helpful
Re looking at the wiring diagram I also see the trotted body actuator is tee’d into the turbo actuator circuit, H also goes towards the MAF and ECM fan
is it also worth disconnecting that please, many thks
- Posts
- 12,099
- Location
- Sud ouest France !
I can't see where it's tied into the turbo actuator?
apologies , on the wiring diagram shows SJ2 and SJ3 where the throttle actuator tees into the turbo actuator wires
It’s in the last pictures, J and K, throttle is in the 2nd picture
many thks
- Posts
- 12,099
- Location
- Sud ouest France !
So they don't go to the map sensor??
Arrr.....
Arrr.....
So they don't go to the map sensor??
Arrr.....
just going to quietly stand in the corner , no , nothing to see here , lol
apologises about that
- Posts
- 12,099
- Location
- Sud ouest France !
So, everything that is attached to the actuator wiring should be disconnected.
Check all the connections ie, Throttle body to ecm and actuator to ecm for continuity. Try bemdand moving the wiring harness to detect broken hidden wires.
Once you have continuity through all the connections then the problem itself could still rest at the turbo end. Is there anywhere it England you could have the actuator tested?
Check all the connections ie, Throttle body to ecm and actuator to ecm for continuity. Try bemdand moving the wiring harness to detect broken hidden wires.
Once you have continuity through all the connections then the problem itself could still rest at the turbo end. Is there anywhere it England you could have the actuator tested?
bless u, really appreciate this, thank u for helping me
Alas regarding the the actuator I haven’t looked into getting it tested , however when I turn the key off the actuator motors back and forth as part of the anti jam software program
apologises asking a daft question but what’s the reason please with removing the throttle body connector plse
thks so much once again
- Posts
- 12,099
- Location
- Sud ouest France !
If it's tied into the tbo actuator and you checking for continuity you don't want any other source connected in case there is a false reading or wrong result. Remember, at this point your checking the wires only for breaks.
If it's tied into the tbo actuator and you checking for continuity you don't want any other source connected in case there is a false reading or wrong result. Remember, at this point your checking the wires only for breaks.
bless u and see where ur coming from , will of course update u when I’ve done the checks and not do anything else
thks again
- Posts
- 12,099
- Location
- Sud ouest France !
Keep it simple dude.
Your more than welcome and if it helps, I'll be happy.
indeed and will ensure I don’t go down the rabbit hole so to speak but take one step at a time
Very grateful to u and will of course update u , many thks
Quick update
So managed to do some basic checks of continuity , did find on a smoke test the intercooler wasn't leaking , however on the throttle body even after fitting new O rings on the Egr pipes there was a smoke test leak
Suppose my next step will be to sort out those egr pipes, reinstall the TCM and ECM connectors , batteries and carry out a 5Vdc signal reference check on sensors, trouble is I won’t be able to gain access to the ECM after the battery is reinstalled , unless I use some jump leads , put the battery on the floor so I can still back probe the ECM connectors
I haven’t fitted the new air intake and intercooler pipes onto the turbo in case I need to gain access to the actuator’s connector , ie, when the battery is reinstalled
Opened up the looms going to the ECM connectors , didn’t see any bad wires
Did write out the wires I tested as reference
So that’s where I’m currently at and really hoping when I test the 5Vdc signal test on the various sensors something shows up as running out of ideas
Thks again
So managed to do some basic checks of continuity , did find on a smoke test the intercooler wasn't leaking , however on the throttle body even after fitting new O rings on the Egr pipes there was a smoke test leak
Suppose my next step will be to sort out those egr pipes, reinstall the TCM and ECM connectors , batteries and carry out a 5Vdc signal reference check on sensors, trouble is I won’t be able to gain access to the ECM after the battery is reinstalled , unless I use some jump leads , put the battery on the floor so I can still back probe the ECM connectors
I haven’t fitted the new air intake and intercooler pipes onto the turbo in case I need to gain access to the actuator’s connector , ie, when the battery is reinstalled
Opened up the looms going to the ECM connectors , didn’t see any bad wires
Did write out the wires I tested as reference
So that’s where I’m currently at and really hoping when I test the 5Vdc signal test on the various sensors something shows up as running out of ideas
Thks again
Last edited:
Plus just a thought , I put the smoke machine on just the intercooler to ensure it didn’t have any splits etc , which it didn’t
however I put the smoke machine nozzle on one end and turned it on before blanking off the other end, smoke came out the open end extremely slowly , suppose I was expecting it to come out faster seeing the smoke machine produced quite a bit
just made me wonder if maybe the intercooler was partially blocked , but couldn't really tell how fast it should come out seeing I’ve not got another intercooler as a comparison
however I put the smoke machine nozzle on one end and turned it on before blanking off the other end, smoke came out the open end extremely slowly , suppose I was expecting it to come out faster seeing the smoke machine produced quite a bit
just made me wonder if maybe the intercooler was partially blocked , but couldn't really tell how fast it should come out seeing I’ve not got another intercooler as a comparison
