12 00... Working instructions for ignition system, DME (digital motor electronics) and engine electrics
WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
- Always switch off ignition before working on ignition system.
Never touch components under current with engine running!
Dangerous high tension!
- Always remove DME master relay for the compression test to avoid activation of ignition coils by ignition final stages of the DME control unit.
Dangerous high tension!
- Always switch off ignition before connecting / disconnecting Service Tester, other testers and adapters or replacing components!
- The secondary side (high voltage side) of ignition system must be under load of at least 4 kohm.
- Never start engine after removing distributor cap or disconnecting wire (terminal 4) on ignition coil (terminal 4).
- Never connect a shielded capacitor or test light on ignition coil terminal 1.
- Never connect ignition coil terminal 1 wire earth or battery positive.
For this reason, terminal 1 wire may not be used to interlock starting when service installing a burglar alarm system.