Cabriolet L4-1781cc 1.8L SOHC (1985): Powertrain Management
Also for this vehicle: Cabriolet L4-1781cc 1.8L SOHC (JH) (1989).
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 Management63 pages
Relays and Modules - Computers and Control Systems29 pages
- Electronic Spark Control Module › Component Information › Locations2
Engine Control Module › Component Information23 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 Diagnostics2345
- Digital Idle Stabilizer <--> [Idle/Throttle Speed Control Unit] › Component Information › Description and Operation2
- Oxygen Sensor Relay › Component Information › Locations › Oxygen Sensor Control Unit2
Sensors and Switches - Powertrain Management127 pages
Sensors and Switches - Computers and Control Systems74 pages
Air Flow Meter/Sensor › Component Information14 pages
Technical Service Bulletins4 pages
- Customer Interest: › 258702 › Jul › 87 › Engine Performance - Lack of Acceleration
All Technical Service Bulletins:2 pages
- All Other Service Bulletins for Air Flow Meter/Sensor: › 358704 › Dec › 87 › M/T - Difficult to Shift
- All Other Service Bulletins for Air Flow Meter/Sensor: › 358704 › Dec › 87 › M/T - Difficult to Shift
- Testing and Inspection › Basic Adjustment23456
- Adjustments › Air Flow Sensor Plate234
- 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 Information6 pages
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
- Locations › Coolant Temperature Sensor2
Engine Temperature Sensor › Component Information › Technical Service Bulletins5 pages
- All Technical Service Bulletins: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- Customer Interest: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- All Other Service Bulletins for Engine Temperature Sensor: › 908702 › Jul › 87 › Oil Pressure Buzzer - Sounds After Switching Ignition On
- All Other Service Bulletins for Engine Temperature Sensor: › 908702 › Jul › 87 › Oil Pressure Buzzer - Sounds After Switching Ignition On
- Intake Air Temperature Sensor › Component Information › Specifications
- Knock Sensor › Component Information › Locations234
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
- 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 Induction47 pages
Air Flow Meter/Sensor › Component Information14 pages
Technical Service Bulletins4 pages
All Technical Service Bulletins for Air Flow Meter/Sensor:2 pages
- Customer Interest: › 258702 › Jul › 87 › Engine Performance - Lack of Acceleration
- All Other Service Bulletins for Air Flow Meter/Sensor: › 258501 › Mar › 85 › Sensor Plate Lever - Basic Adjustment
- Testing and Inspection › Basic Adjustment23456
- Adjustments › Air Flow Sensor Plate234
- Intake Air Heater Switch › Component Information › Locations › Preheat Thermostat234
- Thermo Time Switch › Component Information › Locations2345
- 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 System6 pages
- Hall Effect Sensor, Ignition › Component Information › Technical Service Bulletins › Hall Sensor Ignition Kit - Revised
- Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Technical Service Bulletins › Ignition Lock - Binding, Difficult to Insert Key
- Knock Sensor › Component Information › Locations234
Tune-up and Engine Performance Checks47 pages
Fuel Pressure › System Information6 pages
Air/Fuel Mixture › System Information4 pages
- Idle Speed › System Information › Specifications › California Vehicles2
Air Cleaner Housing › Air Cleaner Fresh Air Duct/Hose › Component Information › Technical Service Bulletins2 pages
- Fuel Filter › Fuel Pressure Release › System Information › Service Precautions
- Firing Order › Component Information › Specifications
Ignition Timing › System Information4 pages
Ignition Cable › Component Information › Technical Service Bulletins8 pages
All Technical Service Bulletins for Ignition Cable:4 pages
All Other Service Bulletins for Ignition Cable:2 pages
Distributor, Ignition10 pages
Distributor Advance Unit › Component Information4 pages
- 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 › Specifications2
Spark Plug › Component Information3 pages
- Compression Check › System Information › Specifications23
- Valve Clearance › System Information › Specifications23
Computers and Control Systems221 pages
Air Flow Meter/Sensor › Component Information14 pages
Technical Service Bulletins4 pages
- Customer Interest: › 258702 › Jul › 87 › Engine Performance - Lack of Acceleration
All Technical Service Bulletins for Air Flow Meter/Sensor:2 pages
- All Other Service Bulletins for Air Flow Meter/Sensor: › 258501 › Mar › 85 › Sensor Plate Lever - Basic Adjustment
- Testing and Inspection › Basic Adjustment23456
- Adjustments › Air Flow Sensor Plate234
- 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 › Locations234
- Barometric Pressure Sensor › Component Information › Description and Operation
Coolant Temperature Sensor/Switch (For Computer) › Component Information6 pages
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
- Locations › Coolant Temperature Sensor2
- Electronic Spark Control Module › Component Information › Locations2
Engine Control Module › Component Information22 pages
Technical Service Bulletins5 pages
All Technical Service Bulletins:3 pages
- Customer Interest: › 279501 › Jan › 95 › ECM - Inoperative Due to Improper Battery Charging
- All Other Service Bulletins for Engine Control Module: › 138901 › Jan › 89 › Engine - Metallic Clicking Noise
- All Other Service Bulletins for Engine Control Module: › 138901 › Jan › 89 › Engine - Metallic Clicking Noise
- Diagrams › Diagram Information and Instructions23456789101112
- Testing and Inspection › Component Tests and General Diagnostics2345
Engine Temperature Sensor › Component Information › Technical Service Bulletins4 pages
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
- Digital Idle Stabilizer <--> [Idle/Throttle Speed Control Unit] › Component Information › Description and Operation2
- Knock Sensor › Component Information › Locations234
- Engine Check Light <--> [Malfunction Indicator Lamp] › Component Information › Description and Operation
- C.O. Adjustment Screw <--> [Mixture Calibration Potentiometer] › Component Information › Locations23
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
- 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 Information23 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 Diagnostics2345
- Digital Idle Stabilizer <--> [Idle/Throttle Speed Control Unit] › Component Information › Description and Operation2
- Oxygen Sensor Relay › Component Information › Locations › Oxygen Sensor Control Unit2
Sensors and Switches - Computers and Control Systems76 pages
Air Flow Meter/Sensor › Component Information15 pages
Technical Service Bulletins5 pages
All Technical Service Bulletins:2 pages
- Customer Interest: › 258702 › Jul › 87 › Engine Performance - Lack of Acceleration
- All Other Service Bulletins for Air Flow Meter/Sensor: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke2
- All Other Service Bulletins for Air Flow Meter/Sensor: › 249304 › Nov › 93 › MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke
- Testing and Inspection › Basic Adjustment23456
- Adjustments › Air Flow Sensor Plate234
- 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 Information6 pages
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
- Locations › Coolant Temperature Sensor2
Engine Temperature Sensor › Component Information › Technical Service Bulletins7 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:3 pages
All Other Service Bulletins for Engine Temperature Sensor:0 pages
- 909203 › Feb › 92 › Coolant Indicator LED - Flashing At Normal Temp
- 908703 › Jul › 87 › Coolant Temperature Gauge Light - Flashes
- Intake Air Temperature Sensor › Component Information › Specifications
- Knock Sensor › Component Information › Locations234
Oxygen Sensor › Component Information15 pages
Technical Service Bulletins4 pages
- Customer Interest: › 249401 › Jan › 94 › Engine - Poor Driveability
All Technical Service Bulletins:2 pages
- All Other Service Bulletins for Oxygen Sensor: › 178702 › Aug › 87 › Engine, Factory Rebuilt - Oil Filter Leaks
- All Other Service Bulletins for Oxygen Sensor: › 178702 › Aug › 87 › Engine, Factory Rebuilt - Oil Filter Leaks
- 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 Systems33 pages
Air Injection › System Information › Technical Service Bulletins2 pages
- Catalytic Converter › Component Information › Technical Service Bulletins › Exhaust - Sulfur Odor Noticed At the Pipe23
- 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 Induction231 pages
Fuel Pressure › System Information6 pages
- Fuel Pressure Release › System Information › Service Precautions
- Idle Speed › System Information › Specifications › California Vehicles2
Air/Fuel Mixture › System Information4 pages
Air Cleaner Housing › Air Cleaner Fresh Air Duct/Hose › Component Information › Technical Service Bulletins2 pages
Air Flow Meter/Sensor › Component Information14 pages
Technical Service Bulletins4 pages
- Customer Interest: › 258702 › Jul › 87 › Engine Performance - Lack of Acceleration
All Technical Service Bulletins:2 pages
- All Other Service Bulletins for Air Flow Meter/Sensor: › 199001 › Nov › 90 › Radiator Fan - Stays On High Speed When Extremely Cold
- All Other Service Bulletins for Air Flow Meter/Sensor: › 199001 › Nov › 90 › Radiator Fan - Stays On High Speed When Extremely Cold
- Testing and Inspection › Basic Adjustment23456
- Adjustments › Air Flow Sensor Plate234
- Altitude Compensator › Component Information › Locations
- Auxiliary Air Valve (Idle Speed) › Component Information › Locations234
- Carburetor › Bowl Vent Solenoid › Component Information › Locations › Bowl Vent Solenoid(+++)234
Cold Start Valve <--> [Cold Start Injector] › Component Information7 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 › Fuel Pressure Release › System Information › Service Precautions
- Fuel Injector › Fuel Injector Insert › Component Information › Technical Service Bulletins › Tools - New Fuel Injector Insert/Washer Jet Aiming2
- 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 Tank22 pages
- Fuel Tank Unit › Component Information › Technical Service Bulletins › Tools - Fuel Gauge Sending Unit23
- 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
- Digital Idle Stabilizer <--> [Idle/Throttle Speed Control Unit] › Component Information › Description and Operation2
- 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 Induction47 pages
Air Flow Meter/Sensor › Component Information14 pages
Technical Service Bulletins4 pages
- Customer Interest: › 258702 › Jul › 87 › Engine Performance - Lack of Acceleration
All Technical Service Bulletins for Air Flow Meter/Sensor:2 pages
- All Other Service Bulletins for Air Flow Meter/Sensor: › 258501 › Mar › 85 › Sensor Plate Lever - Basic Adjustment
- Testing and Inspection › Basic Adjustment23456
- Adjustments › Air Flow Sensor Plate234
- Intake Air Heater Switch › Component Information › Locations › Preheat Thermostat234
- Thermo Time Switch › Component Information › Locations2345
- 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 › Locations2345
- 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
- Warm Up Regulator › Component Information › Description and Operation2
Ignition System94 pages
- Firing Order › Component Information › Specifications
Ignition Timing › System Information4 pages
- Ignition Ballast Resistor › Component Information › Specifications
- Ignition Coil Wire › Component Information › Specifications
Distributor, Ignition10 pages
Distributor Advance Unit › Component Information4 pages
- 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 › Specifications2
- Electronic Spark Control Module › Component Information › Locations2
- Hall Effect Sensor, Ignition › Component Information › Technical Service Bulletins › Hall Sensor Ignition Kit - Revised
Ignition Cable › Component Information › Technical Service Bulletins8 pages
All Technical Service Bulletins for Ignition Cable:4 pages
All Other Service Bulletins for Ignition Cable:2 pages
Ignition Coil › Component Information15 pages
- Knock Sensor › Component Information › Locations234
Sensors and Switches - Ignition System6 pages
- Hall Effect Sensor, Ignition › Component Information › Technical Service Bulletins › Hall Sensor Ignition Kit - Revised
- Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Technical Service Bulletins › Ignition Lock - Binding, Difficult to Insert Key
- Knock Sensor › Component Information › Locations234
Spark Plug › Component Information3 pages
- Transmission Control Systems › Lamps and Indicators - Transmission and Drivetrain › Lamps and Indicators - A/T › Shift Indicator › Component Information › Diagrams › Diagram Information and Instructions234567891011