Engine Electrical System - Repair

• 00 Troubleshooting
  • 12 00 ... Instructions for disconnecting and connecting battery
  • 12 00 ... Instructions for removing and installing electronic control units
  • 12 13 Notes on checking ignition system
  • Firing Order
  • 12 Ignition Wires, Spark
    • 12 12 011 Replacing all spark plugs (S54)
• 13 Ignition Coil
  • 12 13 Notes on checking ignition system
  • 12 13 ... Checking secondary signal for stationary ignition distribution
  • 12 13 ... Normal oscillogram (M, S, W engines only)
  • 12 13 009 Checking ignition coils (secondary coil)
  • 12 13 511 Replacing ignition coil (S54)
• 14 Electronic Switching
  • 12 14 521 Replacing pulse generator on crankshaft (S54)
  • 12 14 523 Replacing pulse generator on inlet camshaft (S54)
  • 12 14 524 Replacing pulse generator on exhaust camshaft (S54)
  • 12 14 550 Replacing control unit (DME)
  • 12 14 600 Replacing knock sensor(s) (S54)
  • 12 14 700 Coding control module (DME/DDE)
  • 12 14 705 Programming control unit (DME/DDE)
  • 12 72 010 Removing and installing/replacing throttle actuator (S54)
  • 12 90 100 Replacing fan for electronics box
  • 13 63 554 Replacing throttle valve potentiometer (on throttle valve actuator S54)
  • 61 14 ... Removing and installing/replacing engine compartment B+ terminal
• 31 Alternator With Drive
  • 12 31 ... Replacing alternator belt pulley
  • 12 31 009 Checking alternator (BSD)
  • 12 31 020 Removing and installing/replacing alternator (S54)
• 32 Regulator
  • 12 32 501 Replacing voltage regulator (Valeo/Bosch)
• 41 Starter With Mounting
  • 12 41 020 Removing and installing/replacing starter motor (S54)
  • 12 41 041 Replacing solenoid switch
• 42 Starter Lead
  • 12 42 510 Replacing battery positive lead (between starter motor and B+ support point) (S54)
  • 12 42 540 Replacing safety battery terminal (SBK)
    • Notes
    • Battery in engine compartment
    • Battery in luggage compartment behind side trim panel
    • Battery in luggage compartment under floor trim panel
    • Battery in luggage compartment under spare wheel
• 51 Engine Wiring Loom
  • 12 51 001 Replacing wiring harness section for engine (S54)
  • 12 51 100 Replacing wiring harness section for ignition coil (S54)
• 61 Oil Pressure Oil Temperature
  • 12 61 280 Removing and installing/replacing oil pressure switch (S54)
  • 12 61 285 Replacing level switch for engine oil (S54)
• 63 Switches and Relays
  • 12 72 010 Removing and installing/replacing throttle actuator (S54)
  • 13 63 554 Replacing throttle valve potentiometer (on throttle valve actuator S54)
• 72 Sensor For Control Unit
  • 12 72 010 Removing and installing/replacing throttle actuator (S54)
  • 13 63 554 Replacing throttle valve potentiometer (on throttle valve actuator S54)
• 90 Control Unit Box
  • 12 90 100 Replacing fan for electronics box
  • 61 14 ... Removing and installing/replacing engine compartment B+ terminal