Motronic inj. and ignition system (2-valve, roller rocker finger)

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 Significance of EPC warning lamp (fault lamp for electronic accelerator) in dash panel insert
  3
• 1.5 Connecting fault reader V.A.G 1551 and selecting engine electronics control unit
  4
• 2 Fault memory
  9
• 2.1 Fault memory
  9
• 2.2 Interrogating and erasing fault memory of engine control unit
  9
• 2.3 Automatic test sequence
  10
• 3 Fault table: SAE P0 codes
  11
• 3.1 Fault table: SAE P0 codes
  11
• 4 Fault table: SAE P1 codes
  14
• 4.1 Fault table: SAE P1 codes
  14
• 5 Final control diagnosis
  22
• 5.1 Final control diagnosis
  22
• 5.2 Performing final control diagnosis
  22
• 6 Readiness code
  25
• 6.1 Readiness code
  25
• 6.2 Function
  25
• 6.3 Reading readiness code
  25
• 6.4 Generating readiness code
  26
• 7 Measured value blocks
  33
• 7.1 Measured value blocks
  33
• 7.2 Safety precautions
  33
• 7.3 Read measured value block
  33
• 8 Evaluating measured value blocks, display groups 0...9 -Basic functions-
  34
• 8.1 Evaluating measured value blocks, display groups 0...9 -Basic functions-
  34
• 9 Evaluating measured value blocks, display groups 10...29 -Ignition-
  38
• 9.1 Evaluating measured value blocks, display groups 10...29 -Ignition-
  38
• 10 Evaluating measured value blocks, display grps 30...49, 99 -Lambda regulation-
  42
• 10.1 Evaluating measured value blocks, display grps 30...49, 99 -Lambda regulation-
  42
• 11 Evaluating measured value blocks, display groups 50...69 -Speed regulation-
  47
• 11.1 Evaluating measured value blocks, display groups 50...69 -Speed regulation-
  47
• 12 Evaluating measured value blocks, display groups 70...79 -Reducing emissions-
  50
• 12.1 Evaluating measured value blocks, display groups 70...79 -Reducing emissions-
  50
• 13 Evaluating measured value blocks, display group 100 -Readiness code-
  51
• 13.1 Evaluating measured value blocks, display group 100 -Readiness code-
  51
• Mixture preparation, Injection
  53
• 1 Servicing injection system
  53
• 1.1 Servicing injection system
  53
• 1.2 Fitting locations overview
  53
• 1.3 General notes on injection
  57
• 1.4 Removing and installing parts of the injection system
  59
• 1.5 Dismantling and assembling intake manifold
  68
• 1.6 Dismantling and assembling fuel rail with injectors
  71
• 1.7 Dismantling and assembling air cleaner
  74
• 1.8 Safety precautions
  78
• 1.9 Rules for cleanliness
  79
• 1.10 Technical data
  79
• 2 Checking components
  80
• 2.1 Checking components
  80
• 2.2 Checking Lambda probe heating before catalyst
  80
• 2.3 Checking Lambda probe heating after catalyst
  84
• 2.4 Checking throttle valve control part
  87
• 2.5 Checking intake manifold pressure sender
  91
• 2.6 Checking intake air temperature sender
  92
• 2.7 Checking coolant temperature sender
  96
• 2.8 Checking engine speed sender
  101
• 2.9 Checking injectors
  103
• 2.10 Checking fuel pressure regulator and holding pressure
  109
• 2.11 Checking intake air system for leaks (unmetered air)
  113
• 2.12 Checking intake air preheating
  114
• 2.13 Checking vacuum valve
  114
• 3 Checking functions
  116
• 3.1 Checking functions
  116
• 3.2 Idling check
  116
• 3.3 Checking Lambda probe and Lambda regulation before catalyst
  118
• 3.4 Checking Lambda probe and Lambda regulation after catalyst
  123
• 3.5 Checking ageing of Lambda probe before catalyst
  127
• 3.6 Checking engine operating mode
  128
• 4 Engine control unit
  130
• 4.1 Engine control unit
  130
• 4.2 Checking control unit voltage supply
  130
• 4.3 Procedure after voltage supply open circuit
  132
• 4.4 Replacing engine control unit
  133
• 4.5 Coding engine control unit
  134
• 4.6 Coding variations of engine control unit
  135
• 4.8 Adapting engine control unit to electronic immobilizer
  137
• 5 Checking additional signals
  137
• 5.1 Checking additional signals
  137
• 5.2 Checking speed signal
  137
• 5.3 Checking signal from/to air conditioning system
  139
• 5.4 Checking signal from brake light switch and brake pedal switch
  140
• 5.5 Checking rpm signal
  143
• 5.6 Checking signal from power steering pressure switch
  143
• 5.7 Checking data bus
  145
• Ignition system
  147
• 1 Servicing ignition system
  147
• 1.1 Servicing ignition system
  147
• 1.2 General notes on ignition system
  147
• 1.3 Removing and installing parts of the ignition system
  148
• 1.4 Safety precautions
  151
• 1.5 Test data, spark plugs
  151
• 1.6 Checking Hall sender
  152
• 1.7 Checking ignition transformer
  154
• 1.8 Checking knock sensor
  157
• 1.9 Check misfiring recognition
  159