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Home >> Mercedes Benz >> 1986 >> 560SL >> Repair and Diagnosis >> Engine Performance >> System >> Cis-E System >> Diagnostic Testing >> EZL Ignition Testing >> Engine Not Running
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Engine Not Running

  1. Connect multimeter and Engine Tester (MCM-2110). Crank engine and check dwell angle. Nominal value should be 1-50% or 1-30° of dwell. If not okay, go to step 2). If okay, check ignition timing at cranking RPM. Timing should be about 1° BTDC. If not okay, go to step 4).
  2. With ignition on, test voltage between terminal No. 5 of diagnostic socket (coil terminal No. 15) and ground. Nominal value should be 12 volts. If okay, go to step 3). If not okay, test voltage supply from ignition switch. Test voltage difference between terminals No. 5 and 4 of diagnostic socket (coil terminals No. 1 and 15). Nominal value should zero volts. Go to step 3).
  3. Unplug ignition position indicator (Green wire) from ignition control module. Test resistance of sensor between connector terminals No. 7 and 31d with ohmmeter. Nominal value should be 730-910 ohms. If not okay, replace position indicator. If okay, go to step 4).
  4. Measure dwell angle. If no dwell angle is indicated, replace ignition contol module.
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