Scirocco L4-1781cc 1.8L DOHC (1986): Powertrain Management
Also for this vehicle: Scirocco L4-1715cc 1.7L SOHC (1983), Scirocco L4-1781cc 1.8L SOHC (1987).
Diagnostics
Maintenance
Engine
Transmission
Brakes
Electrical
Steering & suspension
Heating & A/C
Body & interior
Choose Sections to see everything in a chapter, or a chapter title to start at its first page.
Relays and Modules - Powertrain Management57 pages
Relays and Modules - Computers and Control Systems29 pages
- Electronic Spark Control Module › Component Information › Locations2
Engine Control Module › Component Information24 pages
Technical Service Bulletins6 pages
All Technical Service Bulletins for Engine Control Module:3 pages
- Customer Interest: › 279501 › Jan › 95 › ECM - Inoperative Due to Improper Battery Charging
- All Other Service Bulletins for Engine Control Module: › D29001 › Mar › 90 › Tools - VAG 1598 Test Box Description, Application List2
- Diagrams › Diagram Information and Instructions23456789101112
- Testing and Inspection › Component Tests and General Diagnostics23456
- Knock Sensor Module › Component Information › Locations
- Oxygen Sensor Relay › Component Information › Locations › Oxygen Sensor Control Unit2
Sensors and Switches - Powertrain Management111 pages
Sensors and Switches - Computers and Control Systems65 pages
Air Flow Meter/Sensor › Component Information11 pages
- Air Flow Sensor Potentiometer <--> [Air Flow Sensor Plate Position Sensor] › Component Information › Description and Operation23
- Barometric Pressure Sensor › Component Information › Description and Operation
Coolant Temperature Sensor/Switch (For Computer) › Component Information › Technical Service Bulletins4 pages
- Customer Interest for Coolant Temperature Sensor/Switch (For Computer): › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- All Technical Service Bulletins for Coolant Temperature Sensor/Switch (For Computer): › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
Engine Temperature Sensor › Component Information › Technical Service Bulletins4 pages
- Intake Air Temperature Sensor › Component Information › Specifications
- Knock Sensor › Component Information › Technical Service Bulletins › Knock Sensor - Avoiding Unnecessary Replacement2
Oxygen Sensor › Component Information15 pages
Technical Service Bulletins4 pages
All Technical Service Bulletins for Oxygen Sensor:2 pages
- Customer Interest: › 249401 › Jan › 94 › Engine - Poor Driveability
- All Other Service Bulletins for Oxygen Sensor: › 269302 › Jul › 93 › Oxygen Sensor - Failure Due to Silicone
- Diagrams › Diagram Information and Instructions234567891011
- Throttle Full Close Switch › Component Information › Locations › Idle Switch I234567891011
- Full Throttle Switch <--> [Throttle Full Open Switch] › Component Information › Locations › Full Throttle Switch II23456789
- Throttle Position Sensor › Component Information › Locations23
- Throttle Position Switch › Component Information › Locations
Sensors and Switches - Fuel Delivery and Air Induction42 pages
Air Flow Meter/Sensor › Component Information11 pages
- Intake Air Heater Switch › Component Information › Locations › Preheat Thermostat234
- Thermo Time Switch › Component Information › Locations23
- Throttle Full Close Switch › Component Information › Locations › Idle Switch I234567891011
- Full Throttle Switch <--> [Throttle Full Open Switch] › Component Information › Locations › Full Throttle Switch II23456789
- Throttle Position Sensor › Component Information › Locations23
- Throttle Position Switch › Component Information › Locations
Sensors and Switches - Ignition System4 pages
- Hall Effect Sensor, Ignition › Component Information › Service and Repair
- Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Technical Service Bulletins › Ignition Lock - Binding, Difficult to Insert Key
- Knock Sensor › Component Information › Technical Service Bulletins › Knock Sensor - Avoiding Unnecessary Replacement2
Tune-up and Engine Performance Checks46 pages
Fuel Pressure › System Information6 pages
Air/Fuel Mixture › System Information5 pages
- Idle Speed › System Information › Specifications23
Fuel Filter › Component Information › Technical Service Bulletins12 pages
All Technical Service Bulletins for Fuel Filter:4 pages
- Recalls: › NHTSA87V053000 › Apr › 88 › Recall 87V053000: Fuel Pump Seizure
- Customer Interest: › 209402 › Dec › 94 › Fuel System - Poor Engine Performance23
- All Other Service Bulletins for Fuel Filter: › 209402 › Dec › 94 › Fuel System - Poor Engine Performance23
- All Other Service Bulletins for Fuel Filter: › NHTSA87V053000 › Apr › 88 › Recall 87V053000: Fuel Pump Seizure
- Firing Order › Component Information › Specifications
- Ignition Timing › Timing Marks and Indicators › System Information › Locations
Ignition Cable › Component Information › Technical Service Bulletins2 pages
Distributor, Ignition9 pages
- Distributor Advance Unit › Component Information › Specifications2
- Distributor Cap › Component Information › Testing and Inspection
- Distributor Noise Shield › Component Information › Locations
- Distributor Plate › Component Information › Locations
- Distributor Vacuum Control › Component Information › Locations
- Ignition Rotor › Component Information › Specifications23
- Spark Plug › Component Information › Specifications2
- Compression Check › System Information › Specifications23
- Valve Clearance › System Information › Specifications2
Computers and Control Systems205 pages
Air Flow Meter/Sensor › Component Information11 pages
- Air Flow Sensor Potentiometer <--> [Air Flow Sensor Plate Position Sensor] › Component Information › Description and Operation23
- Intake Air Temperature Sensor › Component Information › Specifications
- Auxiliary Air Valve (Idle Speed) › Component Information › Locations2
- Barometric Pressure Sensor › Component Information › Description and Operation
Coolant Temperature Sensor/Switch (For Computer) › Component Information › Technical Service Bulletins4 pages
- All Technical Service Bulletins for Coolant Temperature Sensor/Switch (For Computer): › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- Customer Interest for Coolant Temperature Sensor/Switch (For Computer): › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- Electronic Spark Control Module › Component Information › Locations2
Engine Control Module › Component Information24 pages
Technical Service Bulletins6 pages
- Customer Interest: › 279501 › Jan › 95 › ECM - Inoperative Due to Improper Battery Charging
All Technical Service Bulletins for Engine Control Module:3 pages
- All Other Service Bulletins for Engine Control Module: › D29001 › Mar › 90 › Tools - VAG 1598 Test Box Description, Application List2
- Diagrams › Diagram Information and Instructions23456789101112
- Testing and Inspection › Component Tests and General Diagnostics23456
Engine Temperature Sensor › Component Information › Technical Service Bulletins5 pages
- Customer Interest: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- All Technical Service Bulletins: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- All Other Service Bulletins for Engine Temperature Sensor: › 908703 › Jul › 87 › Coolant Temperature Gauge Light - Flashes
- All Other Service Bulletins for Engine Temperature Sensor: › 908703 › Jul › 87 › Coolant Temperature Gauge Light - Flashes
Frequency Valve, CIS Fuel Injection › Component Information3 pages
- Idle Speed/Throttle Actuator - Electronic › Component Information › Description and Operation
- Idle Boost Valve <--> [Idle Up Control Valve] › Component Information › Locations › Idle Boost Valve I234
- Knock Sensor › Component Information › Technical Service Bulletins › Knock Sensor - Avoiding Unnecessary Replacement2
- Knock Sensor Module › Component Information › Locations
- Engine Check Light <--> [Malfunction Indicator Lamp] › Component Information › Description and Operation
- C.O. Adjustment Screw <--> [Mixture Calibration Potentiometer] › Component Information › Locations23
Oxygen Sensor › Component Information16 pages
Technical Service Bulletins5 pages
- Customer Interest: › 249401 › Jan › 94 › Engine - Poor Driveability
All Technical Service Bulletins:2 pages
- All Other Service Bulletins for Oxygen Sensor: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- All Other Service Bulletins for Oxygen Sensor: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke
- Diagrams › Diagram Information and Instructions234567891011
- Oxygen Sensor Relay › Component Information › Locations › Oxygen Sensor Control Unit2
Relays and Modules - Computers and Control Systems29 pages
- Electronic Spark Control Module › Component Information › Locations2
Engine Control Module › Component Information24 pages
Technical Service Bulletins6 pages
- Customer Interest: › 279501 › Jan › 95 › ECM - Inoperative Due to Improper Battery Charging
All Technical Service Bulletins for Engine Control Module:3 pages
- All Other Service Bulletins for Engine Control Module: › D29001 › Mar › 90 › Tools - VAG 1598 Test Box Description, Application List2
- Diagrams › Diagram Information and Instructions23456789101112
- Testing and Inspection › Component Tests and General Diagnostics23456
- Knock Sensor Module › Component Information › Locations
- Oxygen Sensor Relay › Component Information › Locations › Oxygen Sensor Control Unit2
Sensors and Switches - Computers and Control Systems66 pages
Air Flow Meter/Sensor › Component Information11 pages
- Air Flow Sensor Potentiometer <--> [Air Flow Sensor Plate Position Sensor] › Component Information › Description and Operation23
- Barometric Pressure Sensor › Component Information › Description and Operation
Coolant Temperature Sensor/Switch (For Computer) › Component Information › Technical Service Bulletins4 pages
- Customer Interest for Coolant Temperature Sensor/Switch (For Computer): › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- All Technical Service Bulletins for Coolant Temperature Sensor/Switch (For Computer): › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
Engine Temperature Sensor › Component Information › Technical Service Bulletins5 pages
- Customer Interest: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- All Technical Service Bulletins: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- All Other Service Bulletins for Engine Temperature Sensor: › 648703 › Jul › 87 › Vent Window - Sticks to Weatherstrip
- All Other Service Bulletins for Engine Temperature Sensor: › 648703 › Jul › 87 › Vent Window - Sticks to Weatherstrip
- Intake Air Temperature Sensor › Component Information › Specifications
- Knock Sensor › Component Information › Technical Service Bulletins › Knock Sensor - Avoiding Unnecessary Replacement2
Oxygen Sensor › Component Information15 pages
Technical Service Bulletins4 pages
- Customer Interest: › 249401 › Jan › 94 › Engine - Poor Driveability
All Technical Service Bulletins for Oxygen Sensor:2 pages
- All Other Service Bulletins for Oxygen Sensor: › 269302 › Jul › 93 › Oxygen Sensor - Failure Due to Silicone
- Diagrams › Diagram Information and Instructions234567891011
- Throttle Full Close Switch › Component Information › Locations › Idle Switch I234567891011
- Full Throttle Switch <--> [Throttle Full Open Switch] › Component Information › Locations › Full Throttle Switch II23456789
- Throttle Position Sensor › Component Information › Locations23
- Throttle Position Switch › Component Information › Locations
- Throttle Full Close Switch › Component Information › Locations › Idle Switch I234567891011
- Full Throttle Switch <--> [Throttle Full Open Switch] › Component Information › Locations › Full Throttle Switch II23456789
- Throttle Position Sensor › Component Information › Locations23
- Throttle Position Switch › Component Information › Locations
Emission Control Systems29 pages
- Catalytic Converter › Component Information › Technical Service Bulletins › Exhaust - Sulfur Odor Noticed At the Pipe
- Emissions Maintenance Light › Component Information › Service and Repair › Emission Control System (ESC) Lamp2
Evaporative Emissions System10 pages
- Positive Crankcase Ventilation › Crankcase Control Valve <--> [Positive Crankcase Ventilation Valve] › Component Information › Locations › Crankcase Emission Control Valve(+++)23456789101112
- Thermostatic Air Cleaner › Thermostatic Air Cleaner Vacuum Solenoid Valve › Component Information › Locations › Thermostatic Control Flap(+++)234
Fuel Delivery and Air Induction215 pages
Fuel Pressure › System Information6 pages
- Idle Speed › System Information › Specifications23
Air/Fuel Mixture › System Information5 pages
Air Flow Meter/Sensor › Component Information11 pages
- Altitude Compensator › Component Information › Locations
- Auxiliary Air Valve (Idle Speed) › Component Information › Locations2
- Carburetor › Bowl Vent Solenoid › Component Information › Locations › Bowl Vent Solenoid(+++)234
Cold Start Valve <--> [Cold Start Injector] › Component Information5 pages
- Differential Pressure Regulator › Component Information › Description and Operation
Fuel › Component Information › Technical Service Bulletins12 pages
All Other Service Bulletins for Fuel:2 pages
- Fuel Accumulator › Component Information › Locations2
- Fuel Distributor › Component Information › Locations › Control Plunger2345678
Fuel Filter › Component Information › Technical Service Bulletins9 pages
- Customer Interest: › 209402 › Dec › 94 › Fuel System - Poor Engine Performance23
- Recalls: › NHTSA87V053000 › Apr › 88 › Recall 87V053000: Fuel Pump Seizure
All Technical Service Bulletins for Fuel Filter:4 pages
- All Other Service Bulletins for Fuel Filter: › 289002 › Mar › 90 › Engine - Misfire
- All Other Service Bulletins for Fuel Filter: › 289002 › Mar › 90 › Engine - Misfire
Fuel Injector › Component Information3 pages
- Fuel Pressure Check Valve › Component Information › Locations
- Fuel Pressure Regulator › Component Information › Locations › Differential Pressure Regulator234
- Fuel Supply Line › Component Information › Tools and Equipment
Fuel Tank20 pages
- Fuel Filler Hose › Component Information › Locations
Fuel Gauge Sender › Component Information15 pages
- Fuel Tank Vent › Component Information › Locations › Gravity Valve234
- Fuel Tank Unit › Component Information › Technical Service Bulletins › Tools - Fuel Gauge Sending Unit
- Idle Speed Control (Linkage) › Component Information › Locations
- Idle Speed/Throttle Actuator - Electronic › Component Information › Description and Operation
- Idle Boost Valve <--> [Idle Up Control Valve] › Component Information › Locations › Idle Boost Valve I234
- Intake Air Heater › Intake Air Heater Switch › Component Information › Locations › Preheat Thermostat234
- Intake Air Plenum › Component Information › Locations23
Sensors and Switches - Fuel Delivery and Air Induction42 pages
Air Flow Meter/Sensor › Component Information11 pages
- Intake Air Heater Switch › Component Information › Locations › Preheat Thermostat234
- Thermo Time Switch › Component Information › Locations23
- Throttle Full Close Switch › Component Information › Locations › Idle Switch I234567891011
- Full Throttle Switch <--> [Throttle Full Open Switch] › Component Information › Locations › Full Throttle Switch II23456789
- Throttle Position Sensor › Component Information › Locations23
- Throttle Position Switch › Component Information › Locations
- Thermo Time Switch › Component Information › Locations23
- Throttle Body › Throttle Plate - PFI › Component Information › Locations234
- Throttle Full Close Switch › Component Information › Locations › Idle Switch I234567891011
- Full Throttle Switch <--> [Throttle Full Open Switch] › Component Information › Locations › Full Throttle Switch II23456789
- Throttle Position Sensor › Component Information › Locations23
- Throttle Position Switch › Component Information › Locations
Ignition System69 pages
- Firing Order › Component Information › Specifications
- Ignition Timing › Timing Marks and Indicators › System Information › Locations
- Ignition Coil Wire › Component Information › Specifications
Distributor, Ignition9 pages
- Distributor Advance Unit › Component Information › Specifications2
- Distributor Cap › Component Information › Testing and Inspection
- Distributor Noise Shield › Component Information › Locations
- Distributor Plate › Component Information › Locations
- Distributor Vacuum Control › Component Information › Locations
- Ignition Rotor › Component Information › Specifications23
- Electronic Spark Control Module › Component Information › Locations2
- Hall Effect Sensor, Ignition › Component Information › Service and Repair
Ignition Cable › Component Information › Technical Service Bulletins2 pages
- Knock Sensor › Component Information › Technical Service Bulletins › Knock Sensor - Avoiding Unnecessary Replacement2
Sensors and Switches - Ignition System4 pages
- Hall Effect Sensor, Ignition › Component Information › Service and Repair
- Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Technical Service Bulletins › Ignition Lock - Binding, Difficult to Insert Key
- Knock Sensor › Component Information › Technical Service Bulletins › Knock Sensor - Avoiding Unnecessary Replacement2
- Spark Plug › Component Information › Specifications2
- Transmission Control Systems › Lamps and Indicators - Transmission and Drivetrain › Lamps and Indicators - A/T › Shift Indicator › Component Information › Diagrams › Diagram Information and Instructions234567891011