Last month’s iATN post was related to a no-start BMW that looked a lot like an EWS failure but turned out to be a faulty ground. In this month’s post, Jurgen from San Cristo’bal De Las Casas (Mexico) identifies anther common no-start culprit in a BWM wake up circuit, the Intelligent Battery Sensor, which is integrated into the negative battery terminal. His post could save you some time and help you avoid heading down some blind alleys when diagnosing a similar complaint:
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