Engine Electrical System - Repair (M54)

• Troubleshooting
  • 12 13 Notes on checking ignition system for M54 engines
    • Notes
    • 12 13... Fault in fuel injection system
    • 12 13... Spark-plug faults
    • 12 13... Ignition coil faults
    • 12 13... Further fault patterns with evaluation
    • 12 13... Additional fault notes for troubleshooting
    • 12 13... Normal oscillogram
    • 12 13... Oscillograms of ignition coils from different component manufacturers
    • 12 13... Checking secondary signal for stationary ignition distribution
  • 12 00... Notes for disconnecting and connecting battery
    • Notes
    • Before disconnecting battery:
    • General notes on disconnecting battery:
    • After connecting battery:
    • Vehicles with a two-battery system
  • 11 00... Handling components after flood damage
  • 12 00... Notes/information on start assistance (jump starting)
  • 12 00... Instructions for working on ignition system
  • 12 00... Instructions for removing and replacement of electronic control units
• Ignition Wires, Spark Plugs
  • 12 12 011 Replacing all spark plugs
• Ignition Coil
  • 12 13 Notes on checking ignition system
  • 12 13 009 Checking ignition pencil coils with scan tool or oscilloscope
  • 12 13 511 Replacing ignition coils
  • 12 13 520 Replacing a spark plug connector
• Electronic Switching Or Control Units
  • 12 14 700 Encoding the control unit (DME)
  • 12 14 521 Replacing pulse generator on crankshaft
  • 12 14 523 Replacing pulse generator on inlet camshaft
  • 12 14 524 Replacing pulse generator on exhaust camshaft
  • 12 14 550 Replacing control unit (DME)
  • 12 14 600 Replacing knock sensor
  • 12 14 705 Programming control unit (DME)
  • 12 63 520 Replacing DME master relay
• Alternator With Drive And Mount
  • 12 31... Replacing alternator belt pulley
    • Special tools required:
  • 12 31 009 Checking alternator (BSD)
    • Notes
    • Oscillogram for a fault-free alternator:
    • Oscillogram for a faulty alternator:
  • 12 31 009 Checking alternator and regulator switch
  • 12 31 020 Removing and installing or replacing alternator
• Regulator For Alternator
  • 12 32 501 Replacing voltage regulator (Valeo/Bosch)
    • Notes
    • 12 00... Instructions for connecting and disconnecting test units
    • 12 00... Instructions on component testing
• Starter With Mounting
  • 11 00... Handling components after flood damage
  • 12 41 020 Removing and installing/replacing starter motor
  • 12 41 041 Replacing solenoid switch
• Starter Lead
  • 12 42 530 Removing and installing/replacing battery positive lead (between starter motor and alternator)
  • 12 42 550 Removing and installing/replacing battery positive lead between starter motor and jump start terminal
• Engine Wiring Loom
  • 12 51 001 Replacing wiring harness section for engine
  • 12 51 100 Replacing wiring harness section for ignition coils
• Oil Pressure - Oil Temperature Gauge
  • 12 61 250 Removing and installing/replacing oil temperature sensor
  • 12 61 280 Removing and installing/replacing oil pressure sensor
  • 12 61 285 Replacing level switch for engine oil
• Switches And Relays
  • 12 63 520 Replacing DME master relay
• Engine Control Unit Box
  • 12 90... Removing and installing/replacing electronics box
  • 12 90 100 Replacing fan for electronics box