Motronic injection and ignition system (6-cyl.)

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 Significance of the exhaust gas warning lamp
  4
• 1.6 Connecting fault reader V.A.G 1551 and selecting engine control unit
  6
• 2 Fault memory
  12
• 2.1 Fault memory
  12
• 2.2 Interrogating and erasing fault memory
  12
• 3 Fault table: from V.A.G code 16396 / SAE P0 and P2 codes
  14
• 3.1 Fault table: from V.A.G code 16396 / SAE P0 and P2 codes
  14
• 4 Fault table: from V.A.G code 17510 / SAE P1 and P3 codes
  18
• 4.1 Fault table: from V.A.G code 17510 / SAE P1 and P3 codes
  18
• 5 Final control diagnosis
  29
• 5.1 Final control diagnosis
  29
• 5.2 Performing final control diagnosis
  29
• 6 Readiness code
  39
• 6.1 Readiness code
  39
• 6.2 Reading readiness code
  39
• 6.3 Generating readiness code
  40
• 7 Measured value blocks
  49
• 7.1 Measured value blocks
  49
• 7.2 Safety precautions
  49
• 7.3 Read measured value block
  49
• 8 Evaluating measured value blocks, display groups 0...6 -Basic functions-
  50
• 8.1 Evaluating measured value blocks, display groups 0...6 -Basic functions-
  50
• 9 Evaluating measured value blocks, display groups 10...29 -Ignition-
  54
• 9.1 Evaluating measured value blocks, display groups 10...29 -Ignition-
  54
• 10 Evaluating measured value blocks, display grps. 30...44, 99 -Lambda regulation-
  57
• 10.1 Evaluating measured value blocks, display grps. 30...44, 99 -Lambda regulation-
  57
• 11 Evaluating measured value blocks, display groups 50...69 -Speed regulation-
  64
• 11.1 Evaluating measured value blocks, display groups 50...69 -Speed regulation-
  64
• 13 Evaluating measured value blocks 120...125 -Communication-
  69
• 13.1 Evaluating measured value blocks 120...125 -Communication-
  69
• Mixture preparation, Injection
  71
• 1 Servicing injection system
  71
• 1.1 Servicing injection system
  71
• 1.2 Fitting locations overview
  71
• 1.3 General notes on injection
  78
• 1.4 Removing and installing parts of the injection system
  79
• 1.5 Dismantling and assembling air cleaner
  91
• 1.6 Dismantling and assembling fuel rail with injectors
  93
• 1.7 Removing and installing parts of intake manifold change-over
  95
• 1.8 Removing and installing throttle valve control part
  98
• 1.9 Safety precautions
  102
• 1.10 Rules for cleanliness
  102
• 1.11 Technical data
  103
• 2 Checking components
  103
• 2.1 Checking components
  103
• 2.2 Checking Lambda probe heating for Lambda probe before catalyst
  103
• 2.3 Checking Lambda probe heating for Lambda probes after catalyst
  106
• 2.4 Checking air mass meter
  109
• 2.5 Checking throttle valve control part
  112
• 2.6 Checking coolant temperature sender
  115
• 2.7 Checking intake air temperature sender
  120
• 2.8 Checking engine speed sender
  123
• 2.9 Checking intake manifold change-over
  125
• 2.10 Checking injectors
  126
• 2.11 Checking fuel pressure regulator and holding pressure
  133
• 2.12 Checking intake air system for leaks (unmetered air)
  135
• 3 Checking functions
  136
• 3.1 Checking functions
  136
• 3.2 Idling check
  136
• 3.3 Adapting idling speed
  138
• 3.4 Checking Lambda probe and Lambda regulation before catalyst
  139
• 3.5 Checking Lambda probe and Lambda regulation after catalyst
  144
• 3.6 Checking Lambda probe ageing of Lambda probe 1 bank 1
  148
• 3.7 Checking Lambda probe ageing, Lambda probe 1 bank 2
  149
• 3.8 Checking Lambda probe aging Lambda probe after catalyst (adaption)
  150
• 3.9 Checking engine operating mode
  151
• 3.10 Checking driving characteristics after a cold start
  153
• 4 Engine control unit
  154
• 4.1 Engine control unit
  154
• 4.2 Checking control unit voltage supply
  154
• 4.3 Procedure after voltage supply open circuit
  156
• 4.4 Replacing engine control unit
  157
• 4.5 Coding engine control unit
  158
• 4.6 Coding variations of engine control unit
  159
• 4.7 Adapting engine control unit to throttle valve control part
  160
• 5 Checking additional signals
  162
• 5.1 Checking additional signals
  162
• 5.2 Checking speed signal
  162
• 5.3 Checking signal from/to air conditioning system
  163
• 5.4 Checking signal from clutch pedal switch
  165
• 5.5 Checking signal from brake light switch and brake pedal switch
  166
• 5.6 Checking driving range signal
  166
• 5.7 Checking kick-down point
  167
• 5.8 Checking matching resistor of data bus
  168
• Ignition system
  170
• 1 Servicing ignition system
  170
• 1.1 Servicing ignition system
  170
• 1.2 General notes on ignition system
  170
• 1.3 Removing and installing parts of ignition system
  171
• 1.4 Safety precautions
  174
• 1.5 Test data, spark plugs
  174
• 1.6 Checking Hall sender
  174
• 1.7 Checking ignition coils with output stage
  176
• 1.8 Checking knock sensor
  178
• 1.9 Check misfiring recognition
  180