This post is coming out of my 318IS not starting thread (http://www.bimmerforums.co.uk/forum/...anding-t61507/)
Basically, got this car Nov2009 - all working fine. Got another car May2010 so this car was parked on the drive and started a couple of time a week but not used daily. Oct2010 refused to start one day and in 3 months has started about 5 times randomly. It has a Scorpion 1218T alarm fitted which seems to work fine - on testing the 2 immobilised circuit outputs they have continuity hen disarmed, but car doesn't start. EWS circuit working ok and 'on' constantly with the transponder key taped inside the antenna.
Can anyone help with the following;
I've noticed that when I connect the battery (bonnet obviously open) sometimes the alarm goes off and sometimes it doesn't - but in both instances the alarm fob and everything seems to work ok.
When the alarm GOES OFF on connecting the battery, the car will start when cranked. But then when switched off (say overnight) and left it doesn't start when alarm de-armed & cranked.
When the alarm DOESN'T GO OFF on connecting the battery, the car refuses to start when cranked. But the DME relay is getting power and the 2 immobilised circuit outputs have continuity on them. Cycling the alarm with the keyfob - the relays in the alarm box click as normal but makes no difference.
I have checked the plugs into the alarm box and there is one connector (no 6 on the big block - I believe is the starter circuit) which has melted the plastic around the metal tab. I have checked continuity between the wire and pcb connection in the alarm box and it seems fine.
Also it looks like wiring from a previous alarm (same connectors as current alarm) is still in place into the loom with some wires cut at the connectors.
Any suggestions gratefully received