mattymole Posted March 1, 2009 Share Posted March 1, 2009 I have P38 2.5 diseesel Left for a few days and will not start LH window error , LH wing mirror will not work & and air bag not working light on Any simple remedies appreciated.. M Mole Quote Link to comment Share on other sites More sharing options...
BogMonster Posted March 2, 2009 Share Posted March 2, 2009 Apparently the BECM can cause problems with battery drain by not going to sleep, though I don't know what the fix is. Quote Link to comment Share on other sites More sharing options...
q-rover Posted March 2, 2009 Share Posted March 2, 2009 Charge the battery and see if the faults go away. Then next time you park the vehicle, check the red light by the gear selector. It should switch off after about 3 mins, this means the BECM is asleep. If it comes back on it means some errant radio signals are causing the remote sensor to wake up the BECM. Now instead of drawing about 0.1A, the awake BECM draws about 1A. Next test is disconnect the remote receiver antennna, and see if the BECM continues to wake up, and check that it is the updated part no. Later ones have a much narrower frequency band so are less likely to be waking up the BECM. Quote Link to comment Share on other sites More sharing options...
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