Motronic injection and ignition system (6-cylinder 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 Significance of EPC warning lamp (fault lamp for electronic accelerator) in dash panel insert
  1
• 1.4 Significance of exhaust emissions warning lamp
  2
• 1.5 Technical data of self-diagnosis
  3
• 1.6 Connecting fault reader
  4
• 2 Fault memory
  7
• 2.1 Fault memory
  7
• 2.2 Interrogating and erasing fault memory
  7
• 3 Fault table: from V.A.G code 16396 / SAE P0 and P2 codes
  9
• 3.1 Fault table: from V.A.G code 16396 / SAE P0 and P2 codes
  9
• 4 Fault table: from V.A.G code 17510 / SAE P1 and P3 codes
  15
• 4.1 Fault table: from V.A.G code 17510 / SAE P1 and P3 codes
  15
• 5 Readiness code
  20
• 5.1 Readiness code
  20
• 5.2 Reading readiness code
  21
• 5.3 Generating readiness code
  22
• 6 Final control diagnosis
  34
• 6.1 Final control diagnosis
  34
• 6.2 Performing final control diagnosis
  34
• 7 Measured value blocks
  50
• 7.1 Measured value blocks
  50
• 7.2 Safety precautions
  50
• 7.3 Read measured value block
  50
• 8 Evaluating measured value blocks, display groups 0...6 -Basic functions-
  51
• 8.1 Evaluating measured value blocks, display groups 0...6 -Basic functions-
  51
• 9 Evaluating measured value blocks, display groups 10...29 -Ignition-
  55
• 9.1 Evaluating measured value blocks, display groups 10...29 -Ignition-
  55
• 10 Evaluating measured value blocks, display grps. 30...33, 99 -Lambda regulation-
  57
• 10.1 Evaluating measured value blocks, display grps. 30...33, 99 -Lambda regulation-
  57
• 11 Evaluating measured value blocks, display groups 50...69 -Speed regulation-
  62
• 11.1 Evaluating measured value blocks, display groups 50...69 -Speed regulation-
  62
• 13 Evaluating measured value block, display group 125 -Communication-
  67
• 13.1 Evaluating measured value block, display group 125 -Communication-
  67
• Mixture preparation, Injection
  68
• 1 Servicing injection system
  68
• 1.1 Servicing injection system
  68
• 1.2 Fitting locations overview
  68
• 1.3 General notes on injection
  75
• 1.4 Removing and installing parts of the injection system
  76
• 1.5 Dismantling and assembling intake manifold
  86
• 1.6 Dismantling and assembling fuel rail
  90
• 1.7 Dismantling and assembling air cleaner
  92
• 1.8 Dismantling and assembling intake manifold
  94
• 1.9 Safety precautions
  97
• 1.10 Rules for cleanliness
  98
• 1.11 Technical data
  98
• 2 Checking components
  99
• 2.1 Checking components
  99
• 2.2 Checking Lambda probe heating for Lambda probe before catalyst
  99
• 2.3 Checking Lambda probe heating for Lambda probe after catalyst
  102
• 2.4 Checking air mass meter
  106
• 2.5 Checking throttle valve control part
  109
• 2.6 Checking coolant temperature sender
  113
• 2.7 Checking intake air temperature sender
  118
• 2.8 Checking engine speed sender
  123
• 2.9 Checking injectors
  125
• 2.10 Checking fuel pressure regulator and holding pressure
  131
• 2.11 Checking intake manifold change-over
  134
• 2.12 Checking intake air system for leaks (unmetered air)
  136
• 3 Checking functions
  137
• 3.1 Checking functions
  137
• 3.2 Idling check
  137
• 3.3 Adapting idling speed
  139
• 3.4 Checking Lambda probe and Lambda regulation before catalyst
  140
• 3.5 Checking Lambda probe and Lambda regulation after catalyst
  143
• 3.6 Checking Lambda probe ageing of Lambda probe before catalyst
  146
• 3.7 Checking Lambda probe ageing Lambda probe after catalyst (adaption)
  148
• 3.8 Checking engine operating mode
  149
• 4 Engine control unit
  151
• 4.1 Engine control unit
  151
• 4.2 Checking control unit voltage supply
  151
• 4.3 Procedure after voltage supply open circuit
  153
• 4.4 Erasing values learnt by engine electronics control unit
  153
• 4.5 Replacing engine control unit
  154
• 4.6 Adapting engine control unit to throttle valve control part
  155
• 4.7 Learning kick-down point
  157
• 5 Checking additional signals
  158
• 5.1 Checking additional signals
  158
• 5.2 Checking speed signal
  158
• 5.3 Checking signal from/to air conditioner
  160
• 5.4 Checking signal from clutch pedal switch
  162
• 5.5 Checking signal from brake light switch and brake pedal switch
  164
• 5.6 Checking driving range signal
  167
• 5.7 Checking 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 the ignition system
  171
• 1.4 Safety precautions
  176
• 1.5 Test data, spark plugs
  177
• 1.6 Checking Hall sender
  178
• 1.7 Checking ignition coils with output stage
  181
• 1.8 Checking knock sensor
  184
• 1.9 Check misfiring recognition
  188