Motronic injection and ignition system (5-cyl. 4-valve)

Chapter overview

• Self-diagnosis
  1
• 1 General information on self-diagnosis
  1
• 1.1 Features of self-diagnosis
  1
• 1.3 Significance of exhaust emissions warning lamp
  2
• 1.4 Technical data of self-diagnosis
  3
• 1.5 Connecting the fault reader
  4
• 2 Fault memory
  8
• 2.1 Reading and erasing fault memory
  8
• 2.2 Fault table: from V.A.G code 16395 / SAE P0 or P2 codes
  10
• 2.3 Fault table: from V.A.G code 17455 / SAE P1 or P3 codes
  17
• 3 Final control diagnosis
  29
• 3.1 Performing final control diagnosis
  29
• 4 Readiness code
  43
• 4.1 Reading out readiness code
  43
• 4.2 Generating readiness code
  44
• 5 Measured value blocks
  54
• 5.1 Safety precautions
  54
• 5.2 Reading measured value block
  54
• 6 Evaluating measured value blocks, display groups 0...8 -basic functions-
  56
• 7 Evaluating measured value blocks, display groups 10...29 -Ignition-
  61
• 8 Evaluating measured value blocks, display groups 30...33, 99 -Lambda control-
  65
• 10 Evaluating measured value blocks, display groups 70...78 -Exhaust emission reduction-
  75
• 12 Evaluating measured value blocks, display groups 120...126 -Communication-
  78
• Mixture preparation - injection
  80
• 1 Repairing injection system
  80
• 1.1 Overview of fitting locations
  80
• 1.2 General notes on injection
  82
• 1.3 Removing and installing parts of the injection system
  83
• 1.4 Dismantling and assembling intake manifold
  85
• 1.5 Dismantling and assembling fuel rail
  87
• 1.6 Dismantling and assembling air filter
  88
• 1.7 Safety precautions
  89
• 1.8 Rules for cleanliness
  90
• 1.9 Technical data
  90
• 2 Checking components
  91
• 2.1 Checking Lambda probe heating for Lambda probes before catalytic converter
  91
• 2.2 Checking Lambda probe heating for Lambda probes after catalytic converter
  93
• 2.3 Checking air mass meter
  96
• 2.4 Checking throttle valve control module
  99
• 2.5 Checking coolant temperature sender
  104
• 2.6 Checking intake air temperature sender
  108
• 2.7 Checking engine speed sender
  112
• 2.8 Checking injectors
  113
• 2.9 Checking injectors for leaks and quantity injected
  116
• 2.10 Checking fuel pressure regulator and holding pressure
  119
• 2.11 Checking intake manifold change-over
  122
• 2.12 Checking intake system for leaks (unmetered air)
  124
• 3 Checking functions
  126
• 3.1 Idling check
  126
• 3.2 Adapting idling speed
  127
• 3.3 Checking Lambda probe and Lambda control before catalytic converter
  128
• 3.4 Checking Lambda probe and Lambda control after catalytic converter
  131
• 3.7 Checking engine operating statuses
  136
• 4 Engine control unit
  138
• 4.1 Checking control unit voltage supply
  138
• 4.2 Procedure after voltage supply open circuit
  139
• 4.3 Renewing engine control unit
  140
• 4.4 Coding engine control unit
  141
• 4.5 Erasing learnt values of control unit for engine electronics
  142
• 4.6 Adapting engine control unit to throttle valve control module
  143
• 4.7 Teaching-in kick-down point
  144
• 5 Checking additional signals
  146
• 5.1 Checking speed signal
  146
• 5.2 Checking signals from and to air conditioning system
  147
• 5.3 Checking signal from clutch pedal switch
  149
• 5.4 Checking signal from brake light switch and brake pedal switch
  149
• 5.5 Checking driving range signal
  150
• 5.6 Checking kick-down point
  151
• 5.7 Checking matching resistor for data bus
  152
• Ignition system
  154
• 1 Repairing ignition
  154
• 1.1 General notes on ignition system
  154
• 1.2 Removing and installing parts of ignition system
  154
• 1.3 Safety precautions
  157
• 1.4 Test data, spark plugs
  157
• 1.5 Checking Hall sender
  158
• 1.6 Checking ignition coils with output stage
  160
• 1.7 Checking knock sensors
  163
• 1.8 Checking misfiring detection
  166