LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mini >> 2012 >> Cooper Base, 2D Convertible, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 18 (Engine Controls - Basic Testing) >> Ignition Checks >> Direct Ignition System >> Ignition Coil Primary Signal Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Ignition Coil Primary Signal Check

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 1997 BMW Z3, 1997 BMW M3, 1997 BMW 840Ci, 1997 BMW 740iL, and 1997 BMW 740i. 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 Figure . Connect Black lead to terminal No. 1 on Adapter (127020).
  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).
scientia non olet · About LEMON Manuals