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Old 03-16-2012, 03:39 AM
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Default e92 M3 - Interminttent start

Hope someone can shed more light.... on starting problems

Symptom: All Electronics work but car cannot start. DCT gear light wont turn on. The check engine light sequence not initiated.

Error codes (auto logic):

1) A732 Wakeup Line
2) 2791 IBS general


CAS & IBS have been changed. the Power cable from battery to fuse box checked (good condition). Grounding at battery and engine bay is good.

Strange is that the car will start again after 'resting' .

Now looking at other grounds.

Any help is appreciated if you have had such a issue.

Last edited by staloy; 03-16-2012 at 04:54 AM.


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Old 05-18-2012, 02:04 PM
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i have had an issue where the connector to the jbe (live from battery) had a loose connection and the arcing caused the connection to melt
thus an intermittent starting issue
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Old 05-18-2012, 06:04 PM
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Which modul has stored the WakeUp line error?
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Old 05-18-2012, 11:16 PM
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try unplugging the small blue ibs connector near the battery and see if it starts. There is three wires at the connector. I have seen the ibs sensors short the wakeup line causing no starts.
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