900 L4-1985cc 2.0L DOHC Turbo EFI (1985): Powertrain Management

Also for this vehicle: 900 L4-1985cc 2.0L (1982), 900 L4-1985cc 2.0L DOHC (1986), 900 L4-1985cc 2.0L SOHC (1988), 900 L4-1985cc 2.0L SOHC Turbo VIN S FI (1984), 900 L4-2118cc 2.1L DOHC (1992), 900 S Convertible L4-2290cc 2.3L DOHC (1996), 900 S Convertible L4-2290cc 2.3L DOHC EFI (1997), 900 S Coupe L4-1985cc 2.0L DOHC Turbo EFI (1998), 900 S Coupe L4-2290cc 2.3L DOHC (1995), 900 S Hatchback L4-2290cc 2.3L DOHC EFI (1997), 900 S Sedan L4-2290cc 2.3L DOHC (1994), 900 S Sedan V6-2498cc 2.5L DOHC (1995), 900 SE Convertible L4-1985cc 2.0L DOHC Turbo EFI (1998), 900 SE Convertible V6-2489cc 2.5L DOHC EFI (1997), 900 SE Convertible V6-2498cc 2.5L DOHC (1995), 900 SE Hatchback L4-1985cc 2.0L DOHC Turbo EFI (1997), 900 SE Sedan L4-1985cc 2.0L DOHC Turbo EFI (1996), 900 SE Sedan V6-2498cc 2.5L DOHC (1995), 900 Turbo Convertible L4-1985cc 2.0L DOHC Turbo EFI (1994).

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.

01Relays and Modules Relays and Modules: Sections
02Sensors and Switches Sensors and Switches: Sections
03Maintenance Maintenance: Sections
04Engine, Cooling and Exhaust Engine, Cooling and Exhaust: Sections
05Powertrain Management Powertrain Management: Sections
- Relays and Modules - Powertrain Management48 pages
  - Relays and Modules - Computers and Control Systems22 pages
    Engine Control Module › Component Information12 pages
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Testing and Inspection › Voltage Measurements2 3 4
    Main Relay (Computer/Fuel System) › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Oxygen Sensor Relay › Component Information › Locations › Preheater2
  - Relays and Modules - Fuel Delivery and Air Induction19 pages
    Fuel Pump Relay › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Main Relay (Computer/Fuel System) › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    APC Control Module <--> [Turbocharger Control Module] › Component Information › Locations2 3
  - Relays and Modules - Ignition System › Ignition Control Module › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7
- Sensors and Switches - Powertrain Management82 pages
  - Sensors and Switches - Computers and Control Systems42 pages
    Air Flow Meter/Sensor › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Coolant Temperature Sensor/Switch (For Computer) › Component Information › Specifications2 3 4 5
    Engine Temperature Sensor › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7
    Knock Sensor › Component Information8 pages
    Technical Service Bulletins › Knock Detector - Revised
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
    Oxygen Sensor › Component Information8 pages
    Technical Service Bulletins › Lambda Sensor - Using ISAT to Check Pulse Ratio
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
    Throttle Position Switch › Component Information › Locations2 3 4 5
    Vehicle Speed Sensor › Component Information › Locations
  - Sensors and Switches - Emission Control Systems › Emissions Maintenance Light Reset Switch/Connector › Component Information › Locations2
  - Sensors and Switches - Fuel Delivery and Air Induction27 pages
    Air Flow Meter/Sensor › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Overboost Switch › Component Information › Specifications2 3
    Thermo Time Switch › Component Information › Locations › Temperature Time Switch2
    Throttle Position Switch › Component Information › Locations2 3 4 5
    Pressure Transducer <--> [Turbo Boost Sensor] › Component Information › Locations2 3 4 5 6 7 8 9
  - Sensors and Switches - Ignition System11 pages
    Hall Effect Sensor, Ignition › Component Information › Description and Operation
    Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Service and Repair › Lock Barrel2
    Knock Sensor › Component Information8 pages
    Technical Service Bulletins › Knock Detector - Revised
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
- Tune-up and Engine Performance Checks35 pages
- Computers and Control Systems141 pages
  - Air Flow Meter/Sensor › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
  - Auxiliary Air Valve (Idle Speed) › Component Information › Technical Service Bulletins › Automatic Idle Control Valve - Troubleshooting2 3
  - Boost Pressure Solenoid Valve <--> [Boost Solenoid, Turbocharger] › Component Information5 pages
    Locations2
    Testing and Inspection › Solenoid Valve2 3
  - Coolant Temperature Sensor/Switch (For Computer) › Component Information › Specifications2 3 4 5
  - Data Link Connector › Component Information › Locations › Fuel System Diagnostic Connector2
  - Engine Control Module › Component Information12 pages
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Testing and Inspection › Voltage Measurements2 3 4
  - Engine Temperature Sensor › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7
  - Frequency Valve, CIS Fuel Injection › Component Information › Locations
  - Idle Speed/Throttle Actuator - Electronic › Component Information › Description and Operation2
  - Knock Sensor › Component Information8 pages
    Technical Service Bulletins › Knock Detector - Revised
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
  - Main Relay (Computer/Fuel System) › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
  - Oxygen Sensor › Component Information8 pages
    Technical Service Bulletins › Lambda Sensor - Using ISAT to Check Pulse Ratio
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
  - Oxygen Sensor Relay › Component Information › Locations › Preheater2
  - Relays and Modules - Computers and Control Systems22 pages
    Engine Control Module › Component Information12 pages
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Testing and Inspection › Voltage Measurements2 3 4
    Main Relay (Computer/Fuel System) › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Oxygen Sensor Relay › Component Information › Locations › Preheater2
  - Sensors and Switches - Computers and Control Systems42 pages
    Air Flow Meter/Sensor › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Coolant Temperature Sensor/Switch (For Computer) › Component Information › Specifications2 3 4 5
    Engine Temperature Sensor › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7
    Knock Sensor › Component Information8 pages
    Technical Service Bulletins › Knock Detector - Revised
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
    Oxygen Sensor › Component Information8 pages
    Technical Service Bulletins › Lambda Sensor - Using ISAT to Check Pulse Ratio
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
    Throttle Position Switch › Component Information › Locations2 3 4 5
    Vehicle Speed Sensor › Component Information › Locations
  - Throttle Position Switch › Component Information › Locations2 3 4 5
  - Vehicle Speed Sensor › Component Information › Locations
- Emission Control Systems20 pages
- Fuel Delivery and Air Induction200 pages
  - Fuel Pressure › System Information6 pages
    Specifications
    System Diagnosis › Test Set-Up2 3 4 5
  - Fuel Pressure Release › System Information › Service Precautions2
  - Idle Speed › System Information › Specifications2
  - Air/Fuel Mixture › System Information › Adjustments
  - Accelerator Pedal › Component Information › Description and Operation
  - Air Cleaner Housing › Air Filter Element › Component Information › Service and Repair
  - Air Flow Meter/Sensor › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
  - Auxiliary Air Valve (Idle Speed) › Component Information › Technical Service Bulletins › Automatic Idle Control Valve - Troubleshooting2 3
  - Fuel › Component Information › Technical Service Bulletins › Fuel System - TOP TIER Detergent Gasoline2
  - Fuel Filter › Fuel Pressure Release › System Information › Service Precautions2
  - Fuel Injector › Component Information › Locations2 3 4
  - Fuel Pressure Regulator › Component Information › Locations2 3 4
  - Fuel Pump14 pages
    Fuel Pressure › System Information6 pages
    Specifications
    System Diagnosis › Test Set-Up2 3 4 5
    Fuel Pump Relay › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
  - Fuel Rail › Component Information › Technical Service Bulletins6 pages
    All Technical Service Bulletins for Fuel Rail: › 1084716 › Oct › 84 › Campaign - Throttle Cable/Fuel Rail Modification2 3
    Recalls for Fuel Rail: › 1084716 › Oct › 84 › Campaign - Throttle Cable/Fuel Rail Modification2 3
  - Fuel Return Line › Component Information › Technical Service Bulletins12 pages
    Recalls for Fuel Return Line: › 0585762 › May › 85 › Recall - Fuel Hose Position Inspection2 3 4 5 6
    All Technical Service Bulletins for Fuel Return Line: › 0585762 › May › 85 › Recall - Fuel Hose Position Inspection2 3 4 5 6
  - Fuel Supply Line › Component Information › Technical Service Bulletins14 pages
    Recalls for Fuel Supply Line:7 pages
    NHTSA85V060000 › May › 85 › Recall 85V060000: Flexible Fuel Hose Bent or Twisted
    0585762 › May › 85 › Recall - Fuel Hose Position Inspection2 3 4 5 6
    All Technical Service Bulletins for Fuel Supply Line:7 pages
    NHTSA85V060000 › May › 85 › Recall 85V060000: Flexible Fuel Hose Bent or Twisted
    0585762 › May › 85 › Recall - Fuel Hose Position Inspection2 3 4 5 6
  - Fuel Tank › Component Information8 pages
    Technical Service Bulletins › Fuel Tank - Replacement2
    Description and Operation › Fuel Tank2 3
    Service and Repair › Draining the Fuel Tank2 3
  - Idle Speed/Throttle Actuator - Electronic › Component Information › Description and Operation2
  - Intake Air Heater › Component Information › Technical Service Bulletins › Tool - Flexdriver With 7mm Socket
  - Main Relay (Computer/Fuel System) › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
  - Relays and Modules - Fuel Delivery and Air Induction19 pages
    Fuel Pump Relay › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Main Relay (Computer/Fuel System) › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    APC Control Module <--> [Turbocharger Control Module] › Component Information › Locations2 3
  - Sensors and Switches - Fuel Delivery and Air Induction27 pages
    Air Flow Meter/Sensor › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8
    Overboost Switch › Component Information › Specifications2 3
    Thermo Time Switch › Component Information › Locations › Temperature Time Switch2
    Throttle Position Switch › Component Information › Locations2 3 4 5
    Pressure Transducer <--> [Turbo Boost Sensor] › Component Information › Locations2 3 4 5 6 7 8 9
  - Thermo Time Switch › Component Information › Locations › Temperature Time Switch2
  - Throttle Body › Component Information › Technical Service Bulletins › Throttle Valve - Basic Setting2
  - Throttle Cable/Linkage › Component Information › Technical Service Bulletins6 pages
    Recalls for Throttle Cable/Linkage: › 1084716 › Oct › 84 › Campaign - Throttle Cable/Fuel Rail Modification2 3
    All Technical Service Bulletins for Throttle Cable/Linkage: › 1084716 › Oct › 84 › Campaign - Throttle Cable/Fuel Rail Modification2 3
  - Throttle Position Switch › Component Information › Locations2 3 4 5
  - Turbocharger38 pages
    Air Bypass Valve, Turbocharger › Component Information › Technical Service Bulletins12 pages
    Customer Interest: › 0885781 › Aug › 85 › Turbocharger Inlet Pipe - Hooting Noise2
    All Technical Service Bulletins for Air Bypass Valve:6 pages
    10900034 › Oct › 90 › Turbocharger Air Bypass Valve - Problem Diagnosis2 3
    03891134 › Mar › 89 › Turbo Air Bypass Valve - Updated
    0885781 › Aug › 85 › Turbocharger Inlet Pipe - Hooting Noise2
    All Other Service Bulletins for Air Bypass Valve:4 pages
    10900034 › Oct › 90 › Turbocharger Air Bypass Valve - Problem Diagnosis2 3
    03891134 › Mar › 89 › Turbo Air Bypass Valve - Updated
    Delay Valve, Turbocharger › Component Information › Locations
    Boost Pressure Solenoid Valve <--> [Boost Solenoid, Turbocharger] › Component Information5 pages
    Locations2
    Testing and Inspection › Solenoid Valve2 3
    Intercooler › Component Information › Locations2
    Overboost Switch › Component Information › Specifications2 3
    Pressure Transducer <--> [Turbo Boost Sensor] › Component Information › Locations2 3 4 5 6 7 8 9
    APC Control Module <--> [Turbocharger Control Module] › Component Information › Locations2 3
    Charge Pressure Regulator <--> [Wastegate] › Component Information › Locations2 3
- Ignition System65 pages
  - Firing Order › Component Information › Specifications
  - Ignition Timing2 pages
    Number One Cylinder › Component Information › Locations
    Timing Marks and Indicators › System Information › Locations
  - Distributor, Ignition13 pages
    Distributor Advance Unit › Component Information › Service and Repair
    Ignition Rotor › Component Information › Technical Service Bulletins10 pages
    Recalls for Ignition Rotor: › 1184721 › Nov › 84 › Campaign - Securing Distributor Rotor2 3 4 5
    All Technical Service Bulletins for Ignition Rotor: › 1184721 › Nov › 84 › Campaign - Securing Distributor Rotor2 3 4 5
    Vacuum Spark Delay Valve › Component Information › Description and Operation2
  - Hall Effect Sensor, Ignition › Component Information › Description and Operation
  - Ignition Cable › Component Information › Testing and Inspection
  - Ignition Coil › Component Information10 pages
    Specifications
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
    Description and Operation › General Information2
  - Ignition Control Module › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7
  - Knock Sensor › Component Information8 pages
    Technical Service Bulletins › Knock Detector - Revised
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
  - Relays and Modules - Ignition System › Ignition Control Module › Component Information › Diagrams › Diagram Information and Instructions2 3 4 5 6 7
  - Sensors and Switches - Ignition System11 pages
    Hall Effect Sensor, Ignition › Component Information › Description and Operation
    Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Service and Repair › Lock Barrel2
    Knock Sensor › Component Information8 pages
    Technical Service Bulletins › Knock Detector - Revised
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7
  - Spark Plug › Component Information › Technical Service Bulletins › Spark Plug - Application Reference2 3 4
- Transmission Control Systems › Lamps and Indicators - Transmission and Drivetrain › Lamps and Indicators - A/T › Shift Indicator › Component Information15 pages
  - Locations2 3 4
  - Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8 9 10 11
06Transmission and Drivetrain Transmission and Drivetrain: Sections
07Brakes and Traction Control Brakes and Traction Control: Sections
08Starting and Charging Starting and Charging: Sections
09Power and Ground Distribution Power and Ground Distribution: Sections
10Steering and Suspension Steering and Suspension: Sections
11Heating and Air Conditioning Heating and Air Conditioning: Sections
12Restraint Systems Restraint Systems: Sections
13Accessories and Optional Equipment Accessories and Optional Equipment: Sections
14Body and Frame Body and Frame: Sections
15Cruise Control Cruise Control: Sections
16Instrument Panel, Gauges and Warning Indicators Instrument Panel, Gauges and Warning Indicators: Sections
17Lighting and Horns Lighting and Horns: Sections
18Windows and Glass Windows and Glass: Sections
19Wiper and Washer Systems Wiper and Washer Systems: Sections