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Home >> Mini >> 2012 >> Cooper Base, 2D Convertible, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Engine Controls - System & Component Testing) >> Ignition System >> Direct Ignition System >> Ignition Coil Primary Signal Check
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Ignition Coil Primary Signal Check

WARNING: This page does not describe the selected car, but rather 37 other vehicles, including the 2005 BMW 760i, 2004 BMW 760Li, 2003 BMW Z8, 2003 BMW Z4, and 2003 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
  1. Select cylinder mode on BMW SERVICE TESTER (Sun 2013 Engine Analyzer). Connect universal adapter lead on tester. Connect Brown lead to known good engine ground. See Fig 1. Connect Black lead to terminal No. 1 on Adapter (127020).
    Fig 1: Checking DIS Ignition Coil Primary Signal
    G95C31288Courtesy of BMW OF NORTH AMERICA, INC.
  2. Connect adapter to ignition coil of cylinder being tested. Red lead is not used as only one cylinder can be measured. Engine speed displayed will be reduced by a factor of 4. Produce stopped signal on oscilloscope by pressing "R" button on tester. Combustion voltage line will be very erratic on oscilloscope pattern (this is normal).
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