ENGINE ELECTRICAL SYSTEM - REPAIR INSTRUCTIONS - 740i & 740iL

• Troubleshooting
  • 12 00 Contents of Engine Electrical System General
    • Working On Ignition System
    • Removing And Installing Electronic Control Units
    • Welding Work (Overload Protection Of Control Units)
    • Disconnecting And Connecting Battery
    • Disconnecting And Connecting Test Equipment
    • Component Inspection
    • External Jump-Starting Aid
      • Notes
      • Preparation
      • Carrying Out
    • Compression Testing
  • 12 00 ... Instructions for disconnecting and connecting battery
    • Notes
    • Before disconnecting battery:
    • General notes on disconnecting battery:
    • After connecting battery:
    • Vehicles with a two-battery system
• Ignition wires park
  • 12 12 011 Replacing all spark plugs (M60, M62)
    • Notes
    • Installation:
• Ignition coil
  • 12 13 Notes on checking ignition system
    • Troubleshooting
      • Fault In Fuel Injection System
      • Spark-Plug Faults
      • Ignition Coil Faults
      • Further Fault Patterns With Evaluation
      • Additional Fault Notes For Troubleshooting
    • Oscillograms
      • Normal Oscillogram (M, S, W Engines Only)
      • Oscillograms of ignition coils from different manufacturers
  • 12 13 ... Checking Secondary Signal For Stationary Ignition Distribution
    • Special tools required:
    • Engine Test Step 10
  • 12 13 ... Normal oscillogram (M, S, W engines only)
  • 12 13 009 Checking ignition coils (M60, M62, S62)
    • Notes
    • Acoustic cover version 1:
    • Acoustic cover version 2:
    • Installation:
    • M60, M62:
    • M60, M62, S62:
  • 12 13 009 Checking ignition coils (secondary coil)
    • Special tools required:
    • Version with single-spark ignition coils:
    • Version with rod-type ignition coils:
    • Version with ignition coil block:
  • 12 13 511 Replacing ignition coil (M60, M62)
    • Notes
    • Version 1:
    • Version 2:
    • Installation:
    • E31, E38, E39:
  • 12 13 520 Replacing a spark plug connector (M60, M62, M54)
• Electronic Switching
  • 12 14 520 Replacing impulse sensor (M62)
    • Special tools required:
    • Installation:
  • 12 14 525 Replacing sensor for cylinder recognition (camshaft sensor) (M60, M62)
    • Notes
    • Version 1
    • Version 2
    • Installation:
  • 12 14 550 Replacing control unit (Digital Motor Electronics) (M52, M60, M62)
  • 12 14 610 Replacing right knock sensors (cylinder bank 1 to 4) (M60, M62)
  • 12 14 611 Replacing left knock sensors (cylinder bank 5 to 8) (M60, M62)
  • 12 14 700 Coding control module (DME / DDE)
  • 12 14 705 Programming control unit (DME / DDE)
  • 61 35 ... Note on replacing codable/programmable control units
• Alternator with drive
  • 12 31 ... Replacing alternator belt pulley
    • Special tools required:
  • 12 31 009 Checking alternator and regulator switch
    • Test requirements:
    • Connect DIS Tester.
    • Oscillogram for a fault-free alternator:
    • Oscillogram for a faulty alternator:
  • 12 31 020 Removing and installing/replacing alternator (M60, M62)
    • Notes
    • Alternator with air cooling:
    • Alternator with liquid cooling:
    • Recycling
    • Installation:
  • 12 31 400 Replacing cooling air duct for alternator (M60, M62, M73)
• Regulator
  • 12 32 501 Replacing voltage regulator (Valeo/Bosch)
    • Notes
    • Valeo alternator:
    • Bosch alternator:
• Starter with mounting
  • 12 41 020 Removing and installing/replacing starter (M60, M62)
    • Notes
    • Cars without primary catalytic converters only (M60/M62):
    • Cars with primary catalytic converters only (M62):
    • All cars (M60/M62):
    • Installation:
  • 12 41 041 Replacing solenoid switch
• Starter lead
  • 12 42 500 Removing and installing or replacing battery positive lead (between starter, alternator and battery positive support point) (M60, M62)
    • Notes
    • Cars without primary catalytic converters only (M60, M62)
    • Cars with primary catalytic converters only (M62)
    • Installation:
  • 12 42 520 Removing and installing/replacing positive battery lead (between alternator and positive battery terminal on cylinder head cover) (M60, M62)
  • 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
    • Installation:
• Engine Wiring Loom
  • 12 51 001 Replacing wiring harness section for engine (M60, M62)
    • Notes
    • Version 1:
    • Version 2:
    • Installation:
• Oil pressure - oil temperature
  • 12 61 280 Removing and installing/replacing oil pressure switch (M60, M62)
    • Notes
    • Installation:
• Switches and relays
  • 12 63 500 Replacing temperature sensor for electronics
  • 12 63 520 Replacing master relay (M51, M52, M60, M62)
    • Notes
    • Notes on troubleshooting:
• Sensor For Control Unit
  • 12 72 520 Removing and installing / replacing pedal travel sensor (M62)
    • Notes
    • Procedure: