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PCM2 Failure?
- Thread starter 4b4
- Start date
Check the fuses in the main fuse board , if ok then you need to remove the PCM and check the fuse on the rear of it .. its possible there was a voltage spike but unusual , if the leads were at any point reveresed then the pcm fuse will often blow.
If fuse ok then you need to check feeds/earths to the PCM , i cant rember the wire colours off hand but its the black plug , its the thick wires and you should have a permanent feed , an ignition on feed and an earth .. if you have them and the fuse is ok then its not looking good
Also unplugging the pcm and leaveing it unplugged for 10 mins or so may .. just may bring it back to life .. disconnecting the battery and leaveing for 10 mins would also have the same effect.
If fuse ok then you need to check feeds/earths to the PCM , i cant rember the wire colours off hand but its the black plug , its the thick wires and you should have a permanent feed , an ignition on feed and an earth .. if you have them and the fuse is ok then its not looking good
Also unplugging the pcm and leaveing it unplugged for 10 mins or so may .. just may bring it back to life .. disconnecting the battery and leaveing for 10 mins would also have the same effect.
Demort said:Check the fuses in the main fuse board , if ok then you need to remove the PCM and check the fuse on the rear of it .. its possible there was a voltage spike but unusual , if the leads were at any point reveresed then the pcm fuse will often blow.
If fuse ok then you need to check feeds/earths to the PCM , i cant rember the wire colours off hand but its the black plug , its the thick wires and you should have a permanent feed , an ignition on feed and an earth .. if you have them and the fuse is ok then its not looking good
Also unplugging the pcm and leaveing it unplugged for 10 mins or so may .. just may bring it back to life .. disconnecting the battery and leaveing for 10 mins would also have the same effect.
I had, already, had a quick shuftie at the fuse box and D9 (Sound System) had blown, so I replaced it with one of the spare 15A ones, but still no-go.
Can you point me to where the fuse on the rear of the PCM unit itself is? (sorry, I'm an Accountant not an ICE Engineer)
Once the pcm is removed its on the back of the unit , you cant miss it , 10 amp , red fuse , under the wireing plugs .
If one fuse has blown then theres a good chance the pcm fuse has blown as well.
Oh ... no need to appoligise , we all have our skills .. im crap at Maths my self !!!
Also spelling lol
link on pcm removal if it helps ...
http://www.renntech.org/forums/topic/5025-remove-pcm2/
http://www.pistonheads.com/gassing/topic.asp?t=829631
If one fuse has blown then theres a good chance the pcm fuse has blown as well.
Oh ... no need to appoligise , we all have our skills .. im crap at Maths my self !!!
Also spelling lol
link on pcm removal if it helps ...
http://www.renntech.org/forums/topic/5025-remove-pcm2/
http://www.pistonheads.com/gassing/topic.asp?t=829631
Hi Guys - Update
Managed, eventually, to get the PCM Unit out (the bottom right-hand lock tab is a ***** to undo!) and the 10A fuse had also gone, so replaced it & put everything back together.
On firing the unit up Sat Nav worked, but got warning - No Amp, No Radio, No Telephone, No Anything
Turned it off and left it for about 5 minutes & on re-starting everything came alive :thumb:
Did panic a bit at first though, thinking of how much a complete new system would cost (as it's MOST), but now that cash can go towards a new set of Tyres later this year :clap:
Many thanks Demort and GT4 for your help :thumb:
Managed, eventually, to get the PCM Unit out (the bottom right-hand lock tab is a ***** to undo!) and the 10A fuse had also gone, so replaced it & put everything back together.
On firing the unit up Sat Nav worked, but got warning - No Amp, No Radio, No Telephone, No Anything
Turned it off and left it for about 5 minutes & on re-starting everything came alive :thumb:
Did panic a bit at first though, thinking of how much a complete new system would cost (as it's MOST), but now that cash can go towards a new set of Tyres later this year :clap:
Many thanks Demort and GT4 for your help :thumb:
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