hi i have a strange fault not sure but my p38 4.6 was starting ok but jacked up to solve the fail bits for mot now i cannot start car or fix the eas fault using my nanocom i have disabled the immobiliser and the alarm but get no start up lights on the dash and engine will turn over on nanocom all i get is unable to connect to the ecu im stumped can any one help im in poole
P38A fault
- Thread starter carper10
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Datatek
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engine turns over on Nanocom, must be a super strong Nanocom you have there
Not sure what effect turning off the immobiliser has on the V8 as it uses a rolling code. No need to turn the alarm off but turning off EKA is a good idea.
No lights on the dash? Battery flat? Blown fuse? Bad battery connection? Any burning smell from the fuse box?
none of the above happened the engine lights on the dash are not on it was starting when i used the nanocom i was able to turn engine over i think its a immobiliser issue as the engine turned over but not fired up but the nanocom cant find the ecuengine turns over on Nanocom, must be a super strong Nanocom you have there
Not sure what effect turning off the immobiliser has on the V8 as it uses a rolling code. No need to turn the alarm off but turning off EKA is a good idea.
No lights on the dash? Battery flat? Blown fuse? Bad battery connection? Any burning smell from the fuse box?
Datatek
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What did you do with the Nanocom that allowed the engine to turn over?
You can use the Nanocom to do a security learn but not if the ECU cannot be accessed. Might be a problem with the OBD connector or loss of power to the ECU.
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I have always found that some ECU's (e.g. Wabco-D) can ONLY be contacted when the ignition is on (Key Pos 2) as it is only then that the sub-system is powered.
Is it the same for the immobiliser and Engine ECU ?
The self-test lights and then switches off all except TC & ABS as it needs the car to be moving >7MPH before extinguishing those 2....doesn't it? So how did you end up with all lights off and a blank dash?
Is it the same for the immobiliser and Engine ECU ?
The self-test lights and then switches off all except TC & ABS as it needs the car to be moving >7MPH before extinguishing those 2....doesn't it? So how did you end up with all lights off and a blank dash?
if i knew how i could fix it my car had welding and offside suspension ball joints replaced the car was starting ok once we had done the work and put the car off the stands the eas stopped working and nanocom could not link to ecu then for no reason the immobiliser come on got no engine lights on the right hand side but have all the lights on left hand side of dashboard
Datatek
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Arc welding should only be done with the battery disconnected or damage may occur.
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+1^ have seen a lot of damage done to electrical system leaving battery connected when welding
dubbleRR
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What were you welding ,the body or chassis, and what was the welder earth strap connected to ..
and what was the welder earth strap connected to ..we had disconnected the battery i was a mechanic years ago it was body that was welded i have since discovered that the big white plug in drivers footwell one of the pins has snapped im waiting for the plug and obd port so i can replace them but either way im selling it im tired of it breaking down
brianp38dse
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If you mean the white plug behind the a post kick panel just cut the plug out and solder and heat shrink the cables the plugs are only there for assembly at the factory, there is a white connector in both a posts.
Datatek
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+1 ^^^^^
tomcat59alan
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+2,once done both sides all should be good.
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