S15/T15 2WD P/U L4-151 2.5L (1985): Powertrain Management

Also for this vehicle: S15/T15 2WD P/U L4-119 1.9L (1985), S15/T15 2WD P/U L4-119 1.9L VIN A 2-BBL (1983), S15/T15 2WD P/U L4-137 2.2L DSL VIN S (1984), S15/T15 2WD P/U V6-173 2.8L (1991), S15/T15 2WD P/U V6-173 2.8L VIN B 2-bbl (1983), S15/T15 2WD P/U V6-262 4.3L (1988), S15/T15 2WD P/U V6-262 4.3L VIN W CPI (1993), S15/T15 2WD P/U V6-262 4.3L VIN Z (1992).

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 Management20 pages
  - Relays and Modules - Computers and Control Systems14 pages
    Electronic Spark Timing <--> [Electronic Spark Control Module] › Component Information › Locations › Typical Electronic Spark System (ESC)2
    Engine Control Module › Component Information11 pages
    Technical Service Bulletins › Engine Controls - Aftermarket Accessory Usage2 3 4 5 6 7
    Description and Operation › Modes of Operation2
    Testing and Inspection › Diagnostic Trouble Code Descriptions2
    Idle/Throttle Speed Control Unit › Component Information › Specifications
  - Relays and Modules - Fuel Delivery and Air Induction2 pages
    Choke Relay › Component Information › Locations
    Idle/Throttle Speed Control Unit › Component Information › Specifications
  - Relays and Modules - Ignition System4 pages
    Electronic Spark Timing <--> [Electronic Spark Control Module] › Component Information › Locations › Typical Electronic Spark System (ESC)2
    Ignition Control Module › Component Information › Testing and Inspection2
- Sensors and Switches - Powertrain Management47 pages
  - Sensors and Switches - Computers and Control Systems31 pages
    Absolute Pressure Sensor <--> [Barometric Pressure Sensor] › Component Information › Specifications
    Coolant Temperature Sensor/Switch (For Computer) › Component Information › Specifications2
    Manifold Air Temperature (MAT) Sensor <--> [Intake Air Temperature Sensor] › Component Information › Specifications2
    Manifold Pressure/Vacuum Sensor › Component Information › Specifications2 3 4 5 6 7 8
    Oxygen Sensor › Component Information › Technical Service Bulletins › RTV Sealants - Use on Engines With Oxygen Sensors2
    Power Steering Pressure Switch › Component Information › Testing and Inspection2
    Throttle Position Sensor › Component Information › Technical Service Bulletins10 pages
    Customer Interest for Throttle Position Sensor:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Technical Service Bulletins for Throttle Position Sensor:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    Transmission Position Switch/Sensor, A/T › Component Information › Description and Operation2 3
    Vehicle Speed Sensor › Component Information › Technical Service Bulletins › Electrical - VSS Connector Mislabeled
  - Sensors and Switches - Fuel Delivery and Air Induction16 pages
    Auxiliary Fuel Tank Control <--> [Fuel Tank Selector Switch] › Component Information › Locations2 3 4
    Throttle Position Sensor › Component Information › Technical Service Bulletins12 pages
    Customer Interest:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Technical Service Bulletins:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Other Service Bulletins for Throttle Position Sensor: › 913C106 › Jun › 91 › Suspension (Front) - Squeaking Noise2
    All Other Service Bulletins for Throttle Position Sensor: › 913C106 › Jun › 91 › Suspension (Front) - Squeaking Noise
- Tune-up and Engine Performance Checks37 pages
  - Fuel Pressure › Diagnostic Connector - Fuel Pump › Component Information › Locations2
  - Idle Speed › System Information › Adjustments › Minimum Air Rate - Fuel Injection Only2 3 4 5
  - Air Cleaner Housing › Air Filter Element › Component Information › Technical Service Bulletins5 pages
    Customer Interest: › 04-07-30-013B › Feb › 07 › Engine, A/T - Shift/Driveability Concerns/MIL ON2
    All Technical Service Bulletins: › 04-07-30-013B › Feb › 07 › Engine, A/T - Shift/Driveability Concerns/MIL ON2
    All Other Service Bulletins for Air Filter Element: › 8594 › Jun › 85 › Cruise Control - Engine Surge More Noticeable Low Speeds
    All Other Service Bulletins for Air Filter Element: › 8594 › Jun › 85 › Cruise Control - Engine Surge More Noticeable Low Speeds
  - Fuel Filter › Fuel Pressure Release › System Information › Service and Repair
  - Firing Order › Component Information › Specifications › Ignition Firing Order
  - Ignition Timing5 pages
    Ignition Timing Connector › Component Information › Locations2
    Number One Cylinder › Component Information › Locations › Number 1 Cylinder Location
    Timing Marks and Indicators › System Information › Technical Service Bulletins › Ignition - Installation of Timing Indicator/Set Screw2
  - Spark Plug Wire <--> [Ignition Cable] › Component Information › Technical Service Bulletins5 pages
    Customer Interest: › 93356D › Oct › 92 › Engine - Miss, Hesitation, or Roughness
    All Technical Service Bulletins: › 93356D › Oct › 92 › Engine - Miss, Hesitation, or Roughness
    All Other Service Bulletins for Spark Plug Wire: › 911018 › Sep › 90 › Roof Rack - Wind Noise2 3
    All Other Service Bulletins for Spark Plug Wire: › 911018 › Sep › 90 › Roof Rack - Wind Noise
  - Distributor, Ignition › Component Information8 pages
    Locations2 3 4 5
    Service and Repair › Distributor Service2 3
  - Spark Plug › Component Information › Specifications
  - Compression Check › System Information › Specifications2
  - Valve Clearance › System Information › Specifications2
- Computers and Control Systems109 pages
  - Manifold Air Temperature (MAT) Sensor <--> [Intake Air Temperature Sensor] › Component Information › Specifications2
  - Absolute Pressure Sensor <--> [Barometric Pressure Sensor] › Component Information › Specifications
  - Coolant Temperature Sensor/Switch (For Computer) › Component Information › Specifications2
  - Reference Signal <--> [Cranking Signal] › Component Information › Description and Operation2 3
  - Assembly Line Diagnostic Link (ALDL) Connector <--> [Data Link Connector] › Component Information › Locations2
  - Electronic Spark Timing <--> [Electronic Spark Control Module] › Component Information › Locations › Typical Electronic Spark System (ESC)2
  - Engine Control Module › Component Information11 pages
    Technical Service Bulletins › Engine Controls - Aftermarket Accessory Usage2 3 4 5 6 7
    Description and Operation › Modes of Operation2
    Testing and Inspection › Diagnostic Trouble Code Descriptions2
  - Idle Speed/Throttle Actuator - Electronic › Component Information › Locations2 3 4
  - Idle/Throttle Speed Control Unit › Component Information › Specifications
  - Malfunction Indicator Lamp › Component Information › Service and Repair
  - Manifold Pressure/Vacuum Sensor › Component Information › Specifications2 3 4 5 6 7 8
  - Memory Calibration Unit › Component Information › Technical Service Bulletins › PROM/MEMCAL - Identification Marks2
  - Mixture Control Solenoid › Component Information › Specifications
  - Oxygen Sensor › Component Information › Technical Service Bulletins › RTV Sealants - Use on Engines With Oxygen Sensors2
  - Power Steering Pressure Switch › Component Information › Testing and Inspection2
  - Relays and Modules - Computers and Control Systems14 pages
    Electronic Spark Timing <--> [Electronic Spark Control Module] › Component Information › Locations › Typical Electronic Spark System (ESC)2
    Engine Control Module › Component Information11 pages
    Technical Service Bulletins › Engine Controls - Aftermarket Accessory Usage2 3 4 5 6 7
    Description and Operation › Modes of Operation2
    Testing and Inspection › Diagnostic Trouble Code Descriptions2
    Idle/Throttle Speed Control Unit › Component Information › Specifications
  - Sensors and Switches - Computers and Control Systems33 pages
    Absolute Pressure Sensor <--> [Barometric Pressure Sensor] › Component Information › Specifications
    Coolant Temperature Sensor/Switch (For Computer) › Component Information › Specifications2
    Manifold Air Temperature (MAT) Sensor <--> [Intake Air Temperature Sensor] › Component Information › Specifications2
    Manifold Pressure/Vacuum Sensor › Component Information › Specifications2 3 4 5 6 7 8
    Oxygen Sensor › Component Information › Technical Service Bulletins › RTV Sealants - Use on Engines With Oxygen Sensors2
    Power Steering Pressure Switch › Component Information › Testing and Inspection2
    Throttle Position Sensor › Component Information › Technical Service Bulletins12 pages
    Customer Interest:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Technical Service Bulletins:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Other Service Bulletins for Throttle Position Sensor: › 93216 › Oct › 92 › Windshield - Cowl Popping Noise From Pillar Area2
    All Other Service Bulletins for Throttle Position Sensor: › 93216 › Oct › 92 › Windshield - Cowl Popping Noise From Pillar Area
    Transmission Position Switch/Sensor, A/T › Component Information › Description and Operation2 3
    Vehicle Speed Sensor › Component Information › Technical Service Bulletins › Electrical - VSS Connector Mislabeled
  - Shift Light › Component Information › Testing and Inspection2
  - Throttle Position Sensor › Component Information › Technical Service Bulletins12 pages
    Customer Interest:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Technical Service Bulletins:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Other Service Bulletins for Throttle Position Sensor: › 913C106 › Jun › 91 › Suspension (Front) - Squeaking Noise2
    All Other Service Bulletins for Throttle Position Sensor: › 913C106 › Jun › 91 › Suspension (Front) - Squeaking Noise
  - Transmission Position Switch/Sensor, A/T › Component Information › Description and Operation2 3
  - Vehicle Speed Sensor › Component Information › Technical Service Bulletins › Electrical - VSS Connector Mislabeled
- Emission Control Systems50 pages
  - Air Injection4 pages
    Pulsair Valve, Secondary Air Injection › Component Information › Service and Repair
    Pulsed Secondary Air Injection › Component Information › Description and Operation2 3
  - Catalytic Converter › Component Information › Description and Operation2 3 4 5
  - Deceleration Valve › Component Information › Description and Operation2 3
  - Early Fuel Evaporation (EFE) › System Information › Description and Operation › System Description2 3
  - Evaporative Emissions System19 pages
    Bowl Vent Valve › Component Information › Testing and Inspection
    Canister Purge Control Valve › Component Information › Description and Operation2
    Canister Purge Solenoid › Component Information › Description and Operation
    Evaporative Emission Control Canister › Component Information13 pages
    Locations2
    Description and Operation › Vapor Storage Canister, Carbureted Engines2 3 4 5 6 7 8 9 10 11
    Thermal Vacuum Valve - EVAP › Component Information › Testing and Inspection › Canister Purge Thermal Vacuum Switch (CP-TVS)2
  - Exhaust Gas Recirculation7 pages
    EGR Valve › Component Information6 pages
    Locations2
    Testing and Inspection › Chart C-7A - EGR Valve Check, Non-ECM Controlled2 3 4
    Thermal Vacuum Valve, EGR › Component Information › Testing and Inspection
  - Positive Crankcase Ventilation › Component Information › Testing and Inspection2 3
  - Thermostatic Air Cleaner › Component Information › Locations2 3 4 5 6
- Fuel Delivery and Air Induction111 pages
  - Fuel Pressure › Diagnostic Connector - Fuel Pump › Component Information › Locations2
  - Fuel Pressure Release › System Information › Service and Repair
  - Idle Speed › System Information › Adjustments › Minimum Air Rate - Fuel Injection Only2 3 4 5
  - Air Cleaner Housing › Air Filter Element › Component Information › Technical Service Bulletins6 pages
    Customer Interest: › 04-07-30-013B › Feb › 07 › Engine, A/T - Shift/Driveability Concerns/MIL ON2
    All Technical Service Bulletins: › 04-07-30-013B › Feb › 07 › Engine, A/T - Shift/Driveability Concerns/MIL ON2
    All Other Service Bulletins for Air Filter Element: › 892625 › Sep › 89 › Brakes - Light Brake Drag While Driving2
    All Other Service Bulletins for Air Filter Element: › 892625 › Sep › 89 › Brakes - Light Brake Drag While Driving
  - Carburetor › Choke Relay › Component Information › Locations
  - Diagnostic Connector - Fuel Pump › Component Information › Locations2
  - Fuel › Component Information › Technical Service Bulletins › Fuel System - TOP TIER Detergent Gasoline (Canada)2 3 4 5 6 7
  - Fuel Filler Cap › Component Information › Description and Operation
  - Fuel Filter › Fuel Pressure Release › System Information › Service and Repair
  - Fuel Injector › Component Information5 pages
    Technical Service Bulletins › Fuel System - Fuel Injector Maintenance Cleaning2 3
    Specifications › Injector Resistance, Application Chart & J-39021 Tester Values2
  - Fuel Pump › Fuel Pressure › Diagnostic Connector - Fuel Pump › Component Information › Locations2
  - Fuel Reservoir › Component Information › Technical Service Bulletins12 pages
    Customer Interest: › 87T29A › Dec › 86 › Engine - Stall/No Start Condition
    All Technical Service Bulletins: › 87T29A › Dec › 86 › Engine - Stall/No Start Condition
    All Other Service Bulletins for Fuel Reservoir:10 pages
    912122 › Jul › 91 › Cowl - Popping Noise2
    87110 › Apr › 87 › Windshield Washer - Spray Pattern Too Low2
    86T200 › Nov › 86 › Body - Squeaking Noise From Hood/Cowl Panel Area
    86B53 › Mar › 86 › Cowl - Snapping or Popping Noise2 3 4 5
    All Other Service Bulletins for Fuel Reservoir:0 pages
    912122 › Jul › 91 › Cowl - Popping Noise
    87110 › Apr › 87 › Windshield Washer - Spray Pattern Too Low
    86T200 › Nov › 86 › Body - Squeaking Noise From Hood/Cowl Panel Area
    86B53 › Mar › 86 › Cowl - Snapping or Popping Noise
  - Fuel Return Line › Component Information › Technical Service Bulletins › Fuel - Feed/Return Pipe Repair2
  - Fuel Supply Line › Component Information › Technical Service Bulletins17 pages
    Customer Interest: › 906C89 › Sep › 90 › Engine - No Start After Extended Storage2 3 4 5 6
    All Technical Service Bulletins:8 pages
    906C89 › Sep › 90 › Engine - No Start After Extended Storage2 3 4 5 6
    89316C › Nov › 88 › Fuel - Feed/Return Pipe Repair
    8551 › Mar › 85 › Fuel - New EFI System Features & Fuel Line Repair
    All Other Service Bulletins for Fuel Supply Line: › 921068 › Apr › 92 › Tailgate - Latch Rattle, Revised Striker Assembly R&R2 3
    All Other Service Bulletins for Fuel Supply Line: › 921068 › Apr › 92 › Tailgate - Latch Rattle, Revised Striker Assembly R&R
  - Fuel Tank5 pages
    Fuel Tank Pressure Release Valve › Component Information › Testing and Inspection
    Auxiliary Fuel Tank Control <--> [Fuel Tank Selector Switch] › Component Information › Locations2 3 4
  - Idle Speed/Throttle Actuator - Electronic › Component Information › Locations2 3 4
  - Idle/Throttle Speed Control Unit › Component Information › Specifications
  - Relays and Modules - Fuel Delivery and Air Induction2 pages
    Choke Relay › Component Information › Locations
    Idle/Throttle Speed Control Unit › Component Information › Specifications
  - Sensors and Switches - Fuel Delivery and Air Induction18 pages
    Auxiliary Fuel Tank Control <--> [Fuel Tank Selector Switch] › Component Information › Locations2 3 4
    Throttle Position Sensor › Component Information › Technical Service Bulletins14 pages
    Customer Interest:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Technical Service Bulletins:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Other Service Bulletins for Throttle Position Sensor: › 09-06-03-004D › Dec › 10 › Electrical - MIL ON/DTC's Set By Various Control Modules2 3 4
    All Other Service Bulletins for Throttle Position Sensor: › 09-06-03-004D › Dec › 10 › Electrical - MIL ON/DTC's Set By Various Control Modules
  - Throttle Body › Component Information5 pages
    Description and Operation
    Service and Repair › Throttle Body Injection (TBI) Unit2 3 4
  - Throttle Cable/Linkage › Component Information › Service and Repair2
  - Throttle Position Sensor › Component Information › Technical Service Bulletins10 pages
    Customer Interest for Throttle Position Sensor:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
    All Technical Service Bulletins for Throttle Position Sensor:5 pages
    861226D › Jul › 86 › Engine - Poor Performance, Poor Idle, and Engine Surge2 3
    86B1056 › Jul › 86 › Engine Controls - Poor Driveability/Idle, Engine Surge2
- Ignition System38 pages
  - Firing Order › Component Information › Specifications › Ignition Firing Order
  - Ignition Timing5 pages
    Ignition Timing Connector › Component Information › Locations2
    Number One Cylinder › Component Information › Locations › Number 1 Cylinder Location
    Timing Marks and Indicators › System Information › Technical Service Bulletins › Ignition - Installation of Timing Indicator/Set Screw2
  - Distributor, Ignition › Component Information8 pages
    Locations2 3 4 5
    Service and Repair › Distributor Service2 3
  - Electronic Spark Timing <--> [Electronic Spark Control Module] › Component Information › Locations › Typical Electronic Spark System (ESC)2
  - Spark Plug Wire <--> [Ignition Cable] › Component Information › Technical Service Bulletins4 pages
    Customer Interest: › 93356D › Oct › 92 › Engine - Miss, Hesitation, or Roughness
    All Technical Service Bulletins: › 93356D › Oct › 92 › Engine - Miss, Hesitation, or Roughness
    All Other Service Bulletins for Spark Plug Wire: › 561204 › Apr › 95 › A/C Recirculation Door - Water Leak2
    All Other Service Bulletins for Spark Plug Wire: › 561204 › Apr › 95 › A/C Recirculation Door - Water Leak
  - Ignition Coil › Component Information › Specifications2 3 4
  - Ignition Control Module › Component Information › Testing and Inspection2
  - Ignition Timing Connector › Component Information › Locations2
  - Pick-Up Coil, Ignition › Component Information › Specifications2 3 4
  - Pole Piece / Reluctor Wheel, Ignition › Component Information › Service and Repair
  - Relays and Modules - Ignition System4 pages
    Electronic Spark Timing <--> [Electronic Spark Control Module] › Component Information › Locations › Typical Electronic Spark System (ESC)2
    Ignition Control Module › Component Information › Testing and Inspection2
  - Spark Plug › Component Information › Specifications
- Transmission Control Systems7 pages
  - Actuators and Solenoids - Transmission and Drivetrain › Actuators and Solenoids - Transfer Case › Transfer Case Actuator › Component Information › Technical Service Bulletins4 pages
    Customer Interest for Transfer Case Actuator: › 917D175 › Jan › 92 › Drive Axle (Front) - Will Not Disengage2
    All Technical Service Bulletins for Transfer Case Actuator: › 917D175 › Jan › 92 › Drive Axle (Front) - Will Not Disengage2
  - Sensors and Switches - Transmission and Drivetrain › Sensors and Switches - A/T › Transmission Position Switch/Sensor, A/T › Component Information › Description and Operation2 3
- PROM - Programmable Read Only Memory › Component Information44 pages
  - Technical Service Bulletins › Engine Controls - ECM May Contain Wrong PROM2 3
  - Application and ID31 pages
    Introducing the GM PROM Cross Reference Index2 3 4 5 6 7 8 9 10
    Expanded Footnotes › Footnotes 1 Thru 502 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
  - Description and Operation › CALPAK2 3 4 5
  - Service and Repair › CALPAK2 3 4 5
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