Impreza L Coupe F4-2.2L SOHC (1999): Powertrain Management

Also for this vehicle: Impreza 2.5 RS Coupe AWD F4-2.5L SOHC (2001), Impreza 2.5 RS Coupe F4-2.5L SOHC (2000), Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002), Impreza Brighton Coupe AWD F4-2.2L SOHC (1997), Impreza Coupe AWD F4-1820cc 1.8L SOHC (1995), Impreza Coupe FWD F4-1820cc 1.8L SOHC (1995), Impreza F4-2.5L (2008), Impreza F4-2.5L SOHC (2003), Impreza GT F4-2.5L Turbo (2009), Impreza L Coupe AWD F4-2.2L SOHC (2001), Impreza L Sedan F4-2.2L SOHC (1997), Impreza L Sport Wagon AWD F4-2.2L SOHC (2001), Impreza L Sport Wagon F4-2.2L SOHC (1999), Impreza Outback Sport AWD F4-2.5L SOHC (2002), Impreza RS Coupe AWD F4-2.5L DOHC (1998), Impreza RS Coupe AWD F4-2.5L SOHC (1999), Impreza Sedan AWD F4-1820cc 1.8L SOHC (1993), Impreza Sedan FWD F4-1820cc 1.8L SOHC (1995), Impreza Wagon AWD F4-1820cc 1.8L SOHC (1993), Impreza Wagon AWD F4-2.2L SOHC (1996), Impreza Wagon FWD F4-1820cc 1.8L SOHC (1995), Impreza WRX F4-2.0L DOHC Turbo (2004), Impreza WRX F4-2.5L DOHC Turbo (2006), Impreza WRX STI F4-2.5L DOHC Turbo (2007), Impreza WRX STI F4-2.5L Turbo (2008), Impreza WRX Wagon F4-2.0L DOHC Turbo (2002).

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 Management23 pages
  - Relays and Modules - Computers and Control Systems19 pages
    Engine Control Module › Component Information18 pages
    Technical Service Bulletins6 pages
    All Technical Service Bulletins for Engine Control Module:3 pages
    11-59-00 › Feb › 00 › Air Cleaner Chamber - Stalling, MIL ON, Backfire2
    11-58-99 › Jan › 00 › Engine Controls - Slight Hesitation on Acceleration
    Customer Interest for Engine Control Module:3 pages
    11-59-00 › Feb › 00 › Air Cleaner Chamber - Stalling, MIL ON, Backfire2
    11-58-99 › Jan › 00 › Engine Controls - Slight Hesitation on Acceleration
    Diagrams › California Only2 3 4 5 6
    Testing and Inspection › California Only2 3 4 5 6
    Main Relay (Computer/Fuel System) › Component Information › Locations
  - Relays and Modules - Fuel Delivery and Air Induction2 pages
    Fuel Pump Relay › Component Information › Locations
    Main Relay (Computer/Fuel System) › Component Information › Locations
  - Relays and Modules - Ignition System › Ignition Control Module › Component Information › Specifications › Electrical Specifications2
- Sensors and Switches - Powertrain Management113 pages
  - Sensors and Switches - Computers and Control Systems74 pages
    Air Flow Meter/Sensor › Component Information › Technical Service Bulletins16 pages
    All Technical Service Bulletins for Air Flow Meter/Sensor:8 pages
    WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    Recalls: › WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    All Other Service Bulletins for Air Flow Meter/Sensor: › 11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    Camshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
    Coolant Temperature Sensor/Switch (For Computer) › Component Information5 pages
    Description and Operation
    Service and Repair › California Only2 3 4
    Crankshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
    Intake Air Temperature Sensor › Component Information › Description and Operation2
    Knock Sensor › Component Information6 pages
    Locations2
    Service and Repair › Removal2 3 4
    Manifold Pressure/Vacuum Sensor › Component Information › Description and Operation2 3
    Oxygen Sensor › Component Information26 pages
    Technical Service Bulletins › Engine Controls - A/F, O2 Sensor Diagnostic Information2 3 4 5 6 7
    Locations › Identification2 3 4 5 6 7 8 9
    Diagrams › Diagram Information and Instructions2
    Description and Operation › Front Oxygen (A/F) Sensor2 3 4
    Service and Repair › Front Oxygen (A/F) Sensor2 3 4
    Throttle Position Sensor › Component Information8 pages
    Description and Operation › California Only2
    Adjustments › California Only2 3 4
    Service and Repair › California Only2
    Transmission Position Switch/Sensor, A/T › Component Information › Description and Operation
    Vehicle Speed Sensor › Component Information › Description and Operation
  - Sensors and Switches - Fuel Delivery and Air Induction27 pages
    Air Flow Meter/Sensor › Component Information › Technical Service Bulletins16 pages
    All Technical Service Bulletins for Air Flow Meter/Sensor:8 pages
    WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    Recalls: › WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    All Other Service Bulletins for Air Flow Meter/Sensor: › 11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    Fuel Pressure Sensor/Switch › Component Information › Service and Repair2 3
    Throttle Position Sensor › Component Information8 pages
    Description and Operation › California Only2
    Adjustments › California Only2 3 4
    Service and Repair › California Only2
  - Sensors and Switches - Ignition System12 pages
    Camshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
    Crankshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
    Knock Sensor › Component Information6 pages
    Locations2
    Service and Repair › Removal2 3 4
- Tune-up and Engine Performance Checks41 pages
- Computers and Control Systems207 pages
  - A/C Signal › Component Information › Description and Operation
  - Air Flow Meter/Sensor › Component Information › Technical Service Bulletins17 pages
    Recalls: › WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    All Technical Service Bulletins:8 pages
    WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    All Other Service Bulletins for Air Flow Meter/Sensor: › 09-52-08 › Aug › 08 › Cooling System - Coolant Comes Out Of Reservoir2 3
    All Other Service Bulletins for Air Flow Meter/Sensor: › 09-52-08 › Aug › 08 › Cooling System - Coolant Comes Out Of Reservoir
  - Intake Air Temperature Sensor › Component Information › Description and Operation2
  - Auxiliary Air Valve (Idle Speed) › Component Information › Technical Service Bulletins › Engine Controls - ISC Valve Cleaning2
  - Camshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
  - Coolant Temperature Sensor/Switch (For Computer) › Component Information5 pages
    Description and Operation
    Service and Repair › California Only2 3 4
  - Cranking Signal › Component Information › Description and Operation
  - Crankshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
  - Data Link Connector › Component Information10 pages
    Technical Service Bulletins › OBDII System - Data Link Connector Location2 3 4 5 6 7 8
    Locations › For Subaru Select Monitor2
  - Engine Control Module › Component Information18 pages
    Technical Service Bulletins6 pages
    Customer Interest for Engine Control Module:3 pages
    11-59-00 › Feb › 00 › Air Cleaner Chamber - Stalling, MIL ON, Backfire2
    11-58-99 › Jan › 00 › Engine Controls - Slight Hesitation on Acceleration
    All Technical Service Bulletins for Engine Control Module:3 pages
    11-59-00 › Feb › 00 › Air Cleaner Chamber - Stalling, MIL ON, Backfire2
    11-58-99 › Jan › 00 › Engine Controls - Slight Hesitation on Acceleration
    Diagrams › California Only2 3 4 5 6
    Testing and Inspection › California Only2 3 4 5 6
  - Idle Speed/Throttle Actuator - Electronic › Component Information6 pages
    Description and Operation › Description2 3
    Service and Repair › California Only2 3
  - Knock Sensor › Component Information6 pages
    Locations2
    Service and Repair › Removal2 3 4
  - Main Relay (Computer/Fuel System) › Component Information › Locations
  - Manifold Pressure/Vacuum Sensor › Component Information › Description and Operation2 3
  - Oxygen Sensor › Component Information26 pages
    Technical Service Bulletins › Engine Controls - A/F, O2 Sensor Diagnostic Information2 3 4 5 6 7
    Locations › Identification2 3 4 5 6 7 8 9
    Diagrams › Diagram Information and Instructions2
    Description and Operation › Front Oxygen (A/F) Sensor2 3 4
    Service and Repair › Front Oxygen (A/F) Sensor2 3 4
  - Relays and Modules - Computers and Control Systems19 pages
    Engine Control Module › Component Information18 pages
    Technical Service Bulletins6 pages
    Customer Interest for Engine Control Module:3 pages
    11-59-00 › Feb › 00 › Air Cleaner Chamber - Stalling, MIL ON, Backfire2
    11-58-99 › Jan › 00 › Engine Controls - Slight Hesitation on Acceleration
    All Technical Service Bulletins for Engine Control Module:3 pages
    11-59-00 › Feb › 00 › Air Cleaner Chamber - Stalling, MIL ON, Backfire2
    11-58-99 › Jan › 00 › Engine Controls - Slight Hesitation on Acceleration
    Diagrams › California Only2 3 4 5 6
    Testing and Inspection › California Only2 3 4 5 6
    Main Relay (Computer/Fuel System) › Component Information › Locations
  - Sensors and Switches - Computers and Control Systems74 pages
    Air Flow Meter/Sensor › Component Information › Technical Service Bulletins16 pages
    All Technical Service Bulletins for Air Flow Meter/Sensor:8 pages
    WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    Recalls: › WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    All Other Service Bulletins for Air Flow Meter/Sensor: › 11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    Camshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
    Coolant Temperature Sensor/Switch (For Computer) › Component Information5 pages
    Description and Operation
    Service and Repair › California Only2 3 4
    Crankshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
    Intake Air Temperature Sensor › Component Information › Description and Operation2
    Knock Sensor › Component Information6 pages
    Locations2
    Service and Repair › Removal2 3 4
    Manifold Pressure/Vacuum Sensor › Component Information › Description and Operation2 3
    Oxygen Sensor › Component Information26 pages
    Technical Service Bulletins › Engine Controls - A/F, O2 Sensor Diagnostic Information2 3 4 5 6 7
    Locations › Identification2 3 4 5 6 7 8 9
    Diagrams › Diagram Information and Instructions2
    Description and Operation › Front Oxygen (A/F) Sensor2 3 4
    Service and Repair › Front Oxygen (A/F) Sensor2 3 4
    Throttle Position Sensor › Component Information8 pages
    Description and Operation › California Only2
    Adjustments › California Only2 3 4
    Service and Repair › California Only2
    Transmission Position Switch/Sensor, A/T › Component Information › Description and Operation
    Vehicle Speed Sensor › Component Information › Description and Operation
  - Throttle Position Sensor › Component Information8 pages
    Description and Operation › California Only2
    Adjustments › California Only2 3 4
    Service and Repair › California Only2
  - Transmission Position Switch/Sensor, A/T › Component Information › Description and Operation
  - Vehicle Speed Sensor › Component Information › Description and Operation
- Emission Control Systems49 pages
  - Catalytic Converter › Component Information9 pages
    Description and Operation
    Testing and Inspection › California Only2
    Service and Repair › Front Catalytic Converter2 3 4 5 6
  - Evaporative Emissions System25 pages
    Canister Purge Solenoid › Component Information7 pages
    Description and Operation › Canister Purge Control2 3
    Service and Repair › California Only2 3 4
    Evaporative Canister Filter › Component Information › Service and Repair2
    Evaporative Check Valve › Component Information7 pages
    Description and Operation › Fuel Cut Valve2 3
    Service and Repair › Vent Valve2 3 4
    Evaporative Emission Control Canister › Component Information › Description and Operation2
    Evaporative Shut Valve › Component Information › Description and Operation2 3
    Leak Detection Solenoid, Evaporative System › Component Information › Description and Operation2 3 4
  - Exhaust Gas Recirculation6 pages
    EGR Control Solenoid › Component Information › Description and Operation2
    EGR Valve › Component Information4 pages
    Diagrams › California Only2
    Service and Repair › Removal2
  - Fillpipe Restrictor › Component Information › Locations2 3 4 5 6
  - Positive Crankcase Ventilation › Positive Crankcase Ventilation Valve › Component Information › Locations2 3
- Fuel Delivery and Air Induction172 pages
  - Fuel Pressure › System Information › Specifications2
  - Idle Speed › System Information › Specifications2 3
  - Accelerator Pedal › Component Information › Service and Repair2 3 4 5 6 7
  - Air Cleaner Housing › Component Information13 pages
    Technical Service Bulletins7 pages
    All Technical Service Bulletins: › 11-59-00 › Feb › 00 › Air Cleaner Chamber - Stalling, MIL ON, Backfire2
    Customer Interest: › 11-59-00 › Feb › 00 › Air Cleaner Chamber - Stalling, MIL ON, Backfire2
    All Other Service Bulletins for Air Cleaner Housing: › 05-50-10R › Feb › 11 › Wheels/Tires - Highway Speed Vibration/Harshness/Noise2 3
    All Other Service Bulletins for Air Cleaner Housing: › 05-50-10R › Feb › 11 › Wheels/Tires - Highway Speed Vibration/Harshness/Noise
    Locations › California Only2
    Service and Repair › California Only2 3 4
  - Air Flow Meter/Sensor › Component Information › Technical Service Bulletins16 pages
    All Technical Service Bulletins for Air Flow Meter/Sensor:8 pages
    WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    Recalls: › WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    All Other Service Bulletins for Air Flow Meter/Sensor: › 11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
  - Auxiliary Air Valve (Idle Speed) › Component Information › Technical Service Bulletins › Engine Controls - ISC Valve Cleaning2
  - Fillpipe Restrictor › Component Information › Locations2 3 4 5 6
  - Fuel › Component Information › Specifications2
  - Fuel Filler Cap › Component Information › Technical Service Bulletins › State Emissions Test - Fuel Filler Cap Test Procedure2
  - Fuel Filter › Component Information › Specifications2 3
  - Fuel Injector › Component Information17 pages
    Specifications
    Description and Operation › California Only2
    Service and Repair › California Only2 3 4 5 6 7 8 9 10 11 12 13 14
  - Fuel Pressure Regulator › Component Information › Description and Operation
  - Fuel Pressure Sensor/Switch › Component Information › Service and Repair2 3
  - Fuel Pump3 pages
    Fuel Pressure › System Information › Specifications2
    Fuel Pump Relay › Component Information › Locations
  - Fuel Return Line › Component Information7 pages
    Locations2 3 4
    Service and Repair › Removal2 3
  - Fuel Supply Line › Component Information7 pages
    Locations2 3 4
    Service and Repair › Removal2 3
  - Fuel Tank15 pages
    Evaporative Shut Valve › Component Information › Description and Operation2 3
    Fuel Filler Hose › Component Information › Service and Repair › Removal2 3 4 5 6 7 8 9 10 11 12
  - Fuel Tank Unit › Component Information › Service and Repair › Fuel Meter Unit2 3 4 5 6
  - Idle Speed/Throttle Actuator - Electronic › Component Information6 pages
    Description and Operation › Description2 3
    Service and Repair › California Only2 3
  - Main Relay (Computer/Fuel System) › Component Information › Locations
  - Relays and Modules - Fuel Delivery and Air Induction2 pages
    Fuel Pump Relay › Component Information › Locations
    Main Relay (Computer/Fuel System) › Component Information › Locations
  - Sensors and Switches - Fuel Delivery and Air Induction27 pages
    Air Flow Meter/Sensor › Component Information › Technical Service Bulletins16 pages
    Recalls: › WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    All Technical Service Bulletins for Air Flow Meter/Sensor:8 pages
    WWG-90 › May › 02 › Recall - Air Flow Meter Contamination2 3 4 5 6
    11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    All Other Service Bulletins for Air Flow Meter/Sensor: › 11-67-02 › Feb › 02 › Engine Controls - Air Flow Meter Replacement2
    Fuel Pressure Sensor/Switch › Component Information › Service and Repair2 3
    Throttle Position Sensor › Component Information8 pages
    Description and Operation › California Only2
    Adjustments › California Only2 3 4
    Service and Repair › California Only2
  - Throttle Body › Component Information11 pages
    Locations › California Only2
    Description and Operation › California Only2 3
    Service and Repair › Air Intake Chamber2 3 4 5 6
  - Throttle Cable/Linkage › Component Information › Service and Repair2
  - Throttle Position Sensor › Component Information8 pages
    Description and Operation › California Only2
    Adjustments › California Only2 3 4
    Service and Repair › California Only2
- Ignition System43 pages
  - Firing Order › Component Information › Specifications
  - Ignition Timing › Number One Cylinder › Component Information › Locations
  - Camshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
  - Crankshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
  - Ignition Cable › Component Information › Testing and Inspection
  - Ignition Coil › Component Information › Specifications › Electrical Specifications2
  - Ignition Control Module › Component Information › Specifications › Electrical Specifications2
  - Knock Sensor › Component Information6 pages
    Locations2
    Service and Repair › Removal2 3 4
  - Relays and Modules - Ignition System › Ignition Control Module › Component Information › Specifications › Electrical Specifications2
  - Sensors and Switches - Ignition System12 pages
    Camshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
    Crankshaft Position Sensor › Component Information3 pages
    Locations
    Description and Operation › California Only2
    Knock Sensor › Component Information6 pages
    Locations2
    Service and Repair › Removal2 3 4
  - Spark Plug › Component Information10 pages
    Specifications › Mechanical Specifications2
    Service and Repair › Removal and Installation2 3 4 5 6 7 8
- Transmission Control Systems14 pages
  - Actuators and Solenoids - Transmission and Drivetrain › Actuators and Solenoids - A/T › Shift Solenoid, A/T › Component Information › Diagrams › Diagram Information and Instructions2
  - Relays and Modules - Transmission and Drivetrain › Relays and Modules - A/T › Control Module, A/T › Component Information › Technical Service Bulletins2 pages
    Customer Interest for Control Module: › 16-66-02 › Mar › 03 › A/T - Harsh AWD Engagement/Code 45 Set
    All Technical Service Bulletins for Control Module: › 16-66-02 › Mar › 03 › A/T - Harsh AWD Engagement/Code 45 Set
  - Sensors and Switches - Transmission and Drivetrain10 pages
    Sensors and Switches - A/T7 pages
    Throttle Position Sensor/Switch, A/T › Component Information › Diagrams › Diagram Information and Instructions2
    Transmission Position Switch/Sensor, A/T › Component Information › Description and Operation
    Transmission Speed Sensor, A/T › Component Information › Specifications › Vehicle Speed Sensor2
    Transmission Temperature Sensor/Switch, A/T › Component Information › Diagrams › Diagram Information and Instructions2
    Sensors and Switches - M/T3 pages
    Clutch Pedal Position Sensor / Switch › Component Information › Technical Service Bulletins › M/T - Clutch Pedal Squeaking Noise
    Transmission Speed Sensor, M/T › Component Information › Specifications › Front2
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