1992 BMW 535i AutomaticFACTORY OEM SERVICE PROCEDURE

Non-DIS Ignition System

  1. Always disconnect battery or ground cable (located on right rear seat frame) when working on electrical systems, charging the battery or welding.
  2. The secondary (high voltage) side of ignition system must be loaded with at least 4000 ohms. Never connect a shielded capacitor or test light to coil terminal No. 1. Never connect lead of ignition coil terminal No. 1 to ground or battery voltage.
  3. When checking compression, the DME master relay must be removed. DO NOT disconnect lead of ignition coil terminal No. 1 to prevent engine from starting. Never disconnect battery or leads on alternator or starter while engine is running.
NOTE: For location of DME master and fuel pump relays, see DME & FUEL PUMP RELAY LOCATION table under FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEM.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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