Motronic injection and ignition system (6-Cyl. engine)

Chapter overview

• Self-diagnosis
  1
• 1 General to self-diagnosis
  1
• 1.1 General to self-diagnosis
  1
• 1.2 Features of self-diagnosis
  1
• 1.3 Technical data of self-diagnosis
  1
• 1.4 Connecting fault reader V.A.G 1551 and selecting engine electronics control unit
  2
• 2 Fault memory
  6
• 2.1 Fault memory
  6
• 2.2 Interrogating and erasing fault memory
  6
• 2.3 Fault table
  7
• 3 Final control diagnosis
  18
• 3.1 Final control diagnosis
  18
• 3.2 Performing final control diagnosis
  18
• 4 Measured value blocks
  22
• 4.1 Measured value blocks
  22
• 4.2 Safety precautions
  22
• 4.3 Read measured value block
  22
• 4.4 Evaluating measured value blocks
  23
• Mixture preparation, Injection
  33
• 1 Servicing injection system
  33
• 1.1 Servicing injection system
  33
• 1.2 Fitting locations overview
  33
• 1.3 General notes on injection
  37
• 1.4 Removing and installing parts of the injection system
  38
• 1.5 Dismantling and assembling air cleaner
  41
• 1.6 Dismantling and assembling fuel rail with injectors
  44
• 1.7 Removing and installing throttle valve control part
  47
• 1.8 Safety precautions
  53
• 1.9 Rules for cleanliness
  53
• 1.10 Technical data
  54
• 2 Checking components
  54
• 2.1 Checking components
  54
• 2.2 Checking Lambda probe heating
  54
• 2.3 Checking air mass meter
  57
• 2.4 Checking throttle valve control part
  60
• 2.5 Checking throttle valve potentiometer
  68
• 2.6 Checking coolant temperature sender
  69
• 2.7 Checking intake manifold temperature sender
  73
• 2.8 Checking engine speed sender
  76
• 2.9 Checking fuel pressure regulator and holding pressure
  77
• 2.10 Checking intake air system for leaks (unmetered air)
  79
• 2.11 Matching engine electronic control unit to electronic immobilizer
  80
• 2.12 Removing and installing injectors
  81
• 2.13 Checking injectors
  82
• 2.14 Checking and adjusting throttle closing damper
  86
• 3 Checking functions
  87
• 3.1 Checking functions
  87
• 3.2 Idling check
  87
• 3.3 Checking Lambda control
  89
• 3.4 Checking engine operating mode
  92
• 3.5 Checking driving characteristics after a cold start
  94
• 4 Engine control unit
  95
• 4.1 Engine control unit
  95
• 4.2 Checking control unit voltage supply
  95
• 4.3 Procedure after voltage supply open circuit
  97
• 4.4 Replacing engine control unit
  98
• 4.5 Coding engine control unit
  98
• 4.6 Matching engine control unit to throttle valve control part
  99
• 4.7 Matching engine control unit to electronic immobilizer
  100
• 5 Checking additional signals
  102
• 5.1 Checking additional signals
  102
• 5.2 Checking speed signal
  102
• 5.3 Checking air conditioner compressor signal
  103
• 5.4 Checking driving range signal
  105
• Ignition system
  107
• 1 Motronic injection and ignition system with distributor-less ignition
  107
• 1.1 Motronic injection and ignition system with distributor-less ignition
  107
• 1.2 General notes on ignition system
  107
• 1.3 Safety precautions
  111
• 1.4 Test data, spark plugs
  111
• 1.5 Checking Hall sender
  111
• 1.6 Checking ignition transformer
  113
• 1.7 Checking knock sensors
  116
• 2 Motronic injection and ignition system with distributor
  118
• 2.1 Motronic injection and ignition system with distributor
  118
• 2.2 Servicing ignition part
  118
• 2.3 Dismantling and assembling distributor
  122
• 2.4 Safety precautions
  124
• 2.5 Test data, spark plugs
  125
• 2.6 Checking Hall sender
  125
• 2.7 Checking ignition transformer
  126
• 2.8 Checking ignition transformer output stage
  126
• 2.9 Renewing rotor arm
  128