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Home >> BMW >> 1993 >> 325is Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Ignition Checks >> Servicing Precautions >> Non-DIS Ignition System
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Non-DIS Ignition System

  1. Always disconnect battery or ground cable (located on right rear seat frame) when working on electrical systems, charging battery or welding.
  2. Load secondary (high voltage) side of ignition system with at least 4000 ohms. DO NOT  connect a shielded capacitor or test light to coil terminal No. 1. DO NOT  connect lead of ignition coil terminal No. 1 to ground or battery voltage.
  3. When checking compression, remove Digital Motor Electronics (DME) master relay. DO NOT  disconnect lead of ignition coil terminal No. 1 to prevent engine from starting. DO NOT  disconnect battery or leads on alternator or starter while engine is running.
NOTE: For location of DME master and fuel pump relays, refer to the DME & FUEL PUMP RELAY LOCATION  table under PRELIMINARY INSPECTION & ADJUSTMENTS.