Wrangler 4WD L4-150 2.5L VIN P MFI (1998): Powertrain Management

Also for this vehicle: Wrangler 2WD V6-3.8L (2008), Wrangler 4WD V6-3.8L (2009), Wrangler L4-150 2.5L VIN E TBI (1990), Wrangler L4-150 2.5L VIN H TBI (1986), Wrangler L4-150 2.5L VIN P MFI (1993), Wrangler L4-2.4L VIN 1 (2006), Wrangler L4-2.5L VIN P (1999), Wrangler L6-242 4.0L VIN S MFI (1991), Wrangler L6-258 4.2L VIN C 2-bbl (1988), Wrangler L6-258 4.2L VIN M 2-bbl (1989), Wrangler L6-4.0L VIN S (2000).

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 Management90 pages
  - Relays and Modules - Computers and Control Systems77 pages
    Body Control Module › Component Information22 pages
    Locations › Component Locations2
    Service Precautions › Technician Safety Information2
    Application and ID › Glossary of Terms2
    Description and Operation › Airbag System2 3 4 5 6 7 8 9 10
    Testing and Inspection › Initial Inspection and Diagnostic Overview2 3 4
    Service and Repair › Servicing Sub-Assemblies2
    Powertrain Control Module <--> [Engine Control Module] › Component Information49 pages
    Technical Service Bulletins › Engine Control - PCM Initialization Procedure2 3 4 5 6 7 8 9 10
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
    Description and Operation › (A/C) Controls-PCM Input2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
    Automatic Shut Down (ASD) Relay <--> [Main Relay (Computer/Fuel System)] › Component Information6 pages
    Locations2 3
    Testing and Inspection › Helpful Information2 3
  - Relays and Modules - Fuel Delivery and Air Induction13 pages
    Fuel Pump Relay › Component Information › Locations2 3 4 5 6 7
    Automatic Shut Down (ASD) Relay <--> [Main Relay (Computer/Fuel System)] › Component Information6 pages
    Locations2 3
    Testing and Inspection › Helpful Information2 3
- Sensors and Switches - Powertrain Management178 pages
  - Sensors and Switches - Computers and Control Systems122 pages
    Battery Temperature Sensor › Component Information5 pages
    Locations2 3 4
    Testing and Inspection › Testing
    Camshaft Position Sensor › Component Information › Locations2 3 4 5
    Coolant Temperature Sensor/Switch (For Computer) › Component Information › Technical Service Bulletins › Engine Controls - ECT Sensor Test revisions2
    Crankshaft Position Sensor › Component Information12 pages
    Specifications
    Locations › Component Locations2
    Description and Operation › With Automatic Transmission2 3 4
    Testing and Inspection › Component Test2 3
    Service and Repair › With Automatic Transmission2
    Fuel Level Sensor › Component Information › Description and Operation
    Intake Air Temperature Sensor › Component Information › Specifications2 3 4 5
    Manifold Pressure/Vacuum Sensor › Component Information › Specifications2 3 4 5 6 7
    Oil Pressure Sensor › Component Information › Technical Service Bulletins › Engine Controls/Fuel System - Manual Revisions2 3 4 5 6 7 8 9 10
    Oxygen Sensor › Component Information7 pages
    Specifications
    Locations › Oxygen Sensor Bank Locations2 3 4
    Application and ID › Application2
    Power Steering Pressure Switch › Component Information › Specifications2 3 4 5 6
    Throttle Position Sensor › Component Information › Technical Service Bulletins › Engine Controls - TPS Connector/DTC Test Revisions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20…35
    Transmission Position Switch/Sensor, A/T › Component Information › Locations2
    Vehicle Speed Sensor › Component Information25 pages
    Technical Service Bulletins › Engine Controls - Speed Sensor Diagnostics Revisions2 3
    Locations › Component Locations2
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
    Description and Operation › Circuit Operation2
  - Sensors and Switches - Fuel Delivery and Air Induction › Throttle Position Sensor › Component Information › Technical Service Bulletins › Engine Controls - TPS Connector/DTC Test Revisions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20…35
  - Sensors and Switches - Ignition System21 pages
    Camshaft Position Sensor › Component Information › Locations2 3 4 5
    Crankshaft Position Sensor › Component Information12 pages
    Specifications
    Locations › Component Locations2
    Description and Operation › With Automatic Transmission2 3 4
    Testing and Inspection › Component Test2 3
    Service and Repair › With Automatic Transmission2
    Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Description and Operation2 3 4
- Tune-up and Engine Performance Checks34 pages
- Computers and Control Systems410 pages
  - A/C Signal › Component Information › Description and Operation
  - Intake Air Temperature Sensor › Component Information › Specifications2 3 4 5
  - Battery Temperature Sensor › Component Information5 pages
    Locations2 3 4
    Testing and Inspection › Testing
  - Body Control Module › Component Information22 pages
    Locations › Component Locations2
    Service Precautions › Technician Safety Information2
    Application and ID › Glossary of Terms2
    Description and Operation › Airbag System2 3 4 5 6 7 8 9 10
    Testing and Inspection › Initial Inspection and Diagnostic Overview2 3 4
    Service and Repair › Servicing Sub-Assemblies2
  - Brake Signal › Component Information › Description and Operation
  - Camshaft Position Sensor › Component Information › Locations2 3 4 5
  - Coolant Temperature Sensor/Switch (For Computer) › Component Information › Technical Service Bulletins › Engine Controls - ECT Sensor Test revisions2
  - Crankshaft Position Sensor › Component Information12 pages
    Specifications
    Locations › Component Locations2
    Description and Operation › With Automatic Transmission2 3 4
    Testing and Inspection › Component Test2 3
    Service and Repair › With Automatic Transmission2
  - Data Link Connector › Component Information › Locations2 3
  - Powertrain Control Module <--> [Engine Control Module] › Component Information49 pages
    Technical Service Bulletins › Engine Control - PCM Initialization Procedure2 3 4 5 6 7 8 9 10
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
    Description and Operation › (A/C) Controls-PCM Input2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
  - Fuel Level Sensor › Component Information › Description and Operation
  - Idle Speed/Throttle Actuator - Electronic › Component Information › Specifications2 3 4
  - Automatic Shut Down (ASD) Relay <--> [Main Relay (Computer/Fuel System)] › Component Information6 pages
    Locations2 3
    Testing and Inspection › Helpful Information2 3
  - Malfunction Indicator Lamp › Component Information › Description and Operation2
  - Manifold Pressure/Vacuum Sensor › Component Information › Specifications2 3 4 5 6 7
  - Oil Pressure Sensor › Component Information › Technical Service Bulletins › Engine Controls/Fuel System - Manual Revisions2 3 4 5 6 7 8 9 10
  - Oxygen Sensor › Component Information7 pages
    Specifications
    Locations › Oxygen Sensor Bank Locations2 3 4
    Application and ID › Application2
  - Power Steering Pressure Switch › Component Information › Specifications2 3 4 5 6
  - Relays and Modules - Computers and Control Systems77 pages
    Body Control Module › Component Information22 pages
    Locations › Component Locations2
    Service Precautions › Technician Safety Information2
    Application and ID › Glossary of Terms2
    Description and Operation › Airbag System2 3 4 5 6 7 8 9 10
    Testing and Inspection › Initial Inspection and Diagnostic Overview2 3 4
    Service and Repair › Servicing Sub-Assemblies2
    Powertrain Control Module <--> [Engine Control Module] › Component Information49 pages
    Technical Service Bulletins › Engine Control - PCM Initialization Procedure2 3 4 5 6 7 8 9 10
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
    Description and Operation › (A/C) Controls-PCM Input2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
    Automatic Shut Down (ASD) Relay <--> [Main Relay (Computer/Fuel System)] › Component Information6 pages
    Locations2 3
    Testing and Inspection › Helpful Information2 3
  - Sensors and Switches - Computers and Control Systems122 pages
    Battery Temperature Sensor › Component Information5 pages
    Locations2 3 4
    Testing and Inspection › Testing
    Camshaft Position Sensor › Component Information › Locations2 3 4 5
    Coolant Temperature Sensor/Switch (For Computer) › Component Information › Technical Service Bulletins › Engine Controls - ECT Sensor Test revisions2
    Crankshaft Position Sensor › Component Information12 pages
    Specifications
    Locations › Component Locations2
    Description and Operation › With Automatic Transmission2 3 4
    Testing and Inspection › Component Test2 3
    Service and Repair › With Automatic Transmission2
    Fuel Level Sensor › Component Information › Description and Operation
    Intake Air Temperature Sensor › Component Information › Specifications2 3 4 5
    Manifold Pressure/Vacuum Sensor › Component Information › Specifications2 3 4 5 6 7
    Oil Pressure Sensor › Component Information › Technical Service Bulletins › Engine Controls/Fuel System - Manual Revisions2 3 4 5 6 7 8 9 10
    Oxygen Sensor › Component Information7 pages
    Specifications
    Locations › Oxygen Sensor Bank Locations2 3 4
    Application and ID › Application2
    Power Steering Pressure Switch › Component Information › Specifications2 3 4 5 6
    Throttle Position Sensor › Component Information › Technical Service Bulletins › Engine Controls - TPS Connector/DTC Test Revisions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20…35
    Transmission Position Switch/Sensor, A/T › Component Information › Locations2
    Vehicle Speed Sensor › Component Information25 pages
    Technical Service Bulletins › Engine Controls - Speed Sensor Diagnostics Revisions2 3
    Locations › Component Locations2
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
    Description and Operation › Circuit Operation2
  - Throttle Position Sensor › Component Information › Technical Service Bulletins › Engine Controls - TPS Connector/DTC Test Revisions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20…35
  - Transmission Position Switch/Sensor, A/T › Component Information › Locations2
  - Vehicle Speed Sensor › Component Information25 pages
    Technical Service Bulletins › Engine Controls - Speed Sensor Diagnostics Revisions2 3
    Locations › Component Locations2
    Diagrams › Diagram Information and Instructions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
    Description and Operation › Circuit Operation2
  - Voltage Signal › Component Information › Description and Operation
- Emission Control Systems139 pages
  - Catalytic Converter › Component Information79 pages
    Component Information › Description and Operation2
    Component Information › Technical Service Bulletins8 pages
    All Technical Service Bulletins for Doors:4 pages
    23-010-06 › Feb › 06 › Body - Water Leaks From The A-Pillar Area2
    23-41-99 › Oct › 99 › Door Weatherstrip - Water Leaks/Wind Noise2
    Customer Interest for Doors:4 pages
    23-010-06 › Feb › 06 › Body - Water Leaks From The A-Pillar Area2
    23-41-99 › Oct › 99 › Door Weatherstrip - Water Leaks/Wind Noise2
    Technical Service Bulletins67 pages
    Component Information › Description and Operation
    Recalls:16 pages
    J25 › Oct › 09 › Recall - Replace Mopar(R) Value Line Catalytic Converter2 3 4 5
    E22 › Aug › 06 › Recall - PCM Reflash/Inspect/Replace Catalytic Converter2 3 4 5 6 7 8 9 10 11
    All Other Service Bulletins for Catalytic Converter:50 pages
    23-010-06 › Feb › 06 › Recalls for Catalytic Converter:16 pages
    J25 › Oct › 09 › Recall - Replace Mopar(R) Value Line Catalytic Converter2 3 4 5
    E22 › Aug › 06 › Recall - PCM Reflash/Inspect/Replace Catalytic Converter2 3 4 5 6 7 8 9 10 11
    23-41-99 › Oct › 99 › Component Information34 pages
    Technical Service Bulletins32 pages
    All Technical Service Bulletins for Catalytic Converter:16 pages
    J25 › Oct › 09 › Recall - Replace Mopar(R) Value Line Catalytic Converter2 3 4 5
    E22 › Aug › 06 › Recall - PCM Reflash/Inspect/Replace Catalytic Converter2 3 4 5 6 7 8 9 10 11
    Recalls for Catalytic Converter:16 pages
    J25 › Oct › 09 › Recall - Replace Mopar(R) Value Line Catalytic Converter2 3 4 5
    E22 › Aug › 06 › Recall - PCM Reflash/Inspect/Replace Catalytic Converter2 3 4 5 6 7 8 9 10 11
    Service and Repair › Removal2
    Service and Repair › System Information › Service Precautions2
  - Evaporative Emissions System42 pages
    Canister Purge Solenoid › Component Information › Locations2 3 4
    Evaporative Emission Control Canister › Component Information › Specifications2 3 4
    Evaporative System Service Port › Component Information › Locations
    Leak Detection Pump, Evaporative System › Component Information › Technical Service Bulletins › Emissions - EGR/EVAP Test Revisions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
    Leak Detection Solenoid, Evaporative System › Component Information › Technical Service Bulletins › Emissions - EGR/EVAP Test Revisions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
  - Exhaust Gas Recirculation › EGR Control Solenoid › Component Information › Technical Service Bulletins › Emissions - EGR/EVAP Test Revisions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
  - Positive Crankcase Ventilation › Component Information › Locations2
- Fuel Delivery and Air Induction169 pages
  - Fuel Pressure › Fuel Pressure Test Port › Component Information › Locations
  - Fuel Pressure Release › System Information › Service and Repair
  - Idle Speed › System Information › Specifications2
  - Air/Fuel Mixture › System Information › Technical Service Bulletins › Fuel System/Engine Controls - Manual Revisions2 3 4 5 6 7 8 9
  - Accelerator Pedal › Component Information › Specifications2
  - Air Cleaner Housing › Air Filter Element › Component Information › Service and Repair
  - Fuel › Component Information › Technical Service Bulletins › Engine - High Driveability Index Fuels2
  - Fuel Filler Cap › Component Information › Specifications2 3
  - Fuel Filter › Fuel Pressure Release › System Information › Service and Repair
  - Fuel Hose Clamp › Component Information › Specifications
  - Fuel Injector › Component Information › Specifications › Electrical Specifications2
  - Fuel Line Coupler › Component Information5 pages
    Description and Operation
    Service and Repair › Single Tab Type2 3 4
  - Fuel Pressure Regulator › Component Information › Locations2 3 4
  - Fuel Pressure Test Port › Component Information › Locations
  - Fuel Pressure Pulsation Damper › Component Information › Description and Operation
  - Fuel Pump8 pages
    Fuel Pressure › Fuel Pressure Test Port › Component Information › Locations
    Fuel Pump Relay › Component Information › Locations2 3 4 5 6 7
  - Fuel Pump Pickup Filter › Component Information › Service and Repair
  - Fuel Rail › Component Information › Specifications2 3
  - Fuel Return Line › Component Information5 pages
    Description and Operation
    Service and Repair › Single Tab Type2 3 4
  - Fuel Supply Line › Component Information6 pages
    Description and Operation2
    Service and Repair › Single Tab Type2 3 4
  - Fuel Tank › Fuel Gauge Sender › Component Information › Technical Service Bulletins › Engine Controls/Fuel System - Service Manual Revisions2 3 4 5
  - Fuel Tank Unit › Component Information › Specifications2 3 4
  - Idle Speed/Throttle Actuator - Electronic › Component Information › Specifications2 3 4
  - Automatic Shut Down (ASD) Relay <--> [Main Relay (Computer/Fuel System)] › Component Information6 pages
    Locations2 3
    Testing and Inspection › Helpful Information2 3
  - Relays and Modules - Fuel Delivery and Air Induction13 pages
    Fuel Pump Relay › Component Information › Locations2 3 4 5 6 7
    Automatic Shut Down (ASD) Relay <--> [Main Relay (Computer/Fuel System)] › Component Information6 pages
    Locations2 3
    Testing and Inspection › Helpful Information2 3
  - Rollover Valve, Fuel Tank › Component Information › Description and Operation2
  - Sensors and Switches - Fuel Delivery and Air Induction › Throttle Position Sensor › Component Information › Technical Service Bulletins › Engine Controls - TPS Connector/DTC Test Revisions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20…35
  - Throttle Body › Component Information › Specifications2 3 4
  - Throttle Cable/Linkage › Component Information › Service and Repair2
  - Throttle Position Sensor › Component Information › Technical Service Bulletins › Engine Controls - TPS Connector/DTC Test Revisions2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20…35
- Ignition System61 pages
  - Firing Order › Component Information › Specifications
  - Ignition Timing2 pages
    Number One Cylinder › Component Information › Locations
    Timing Marks and Indicators › System Information › Locations
  - Camshaft Position Sensor › Component Information › Locations2 3 4 5
  - Crankshaft Position Sensor › Component Information12 pages
    Specifications
    Locations › Component Locations2
    Description and Operation › With Automatic Transmission2 3 4
    Testing and Inspection › Component Test2 3
    Service and Repair › With Automatic Transmission2
  - Distributor, Ignition2 pages
    Distributor Cap › Component Information › Testing and Inspection
    Ignition Rotor › Component Information › Testing and Inspection
  - Ignition Cable › Component Information › Specifications2 3 4
  - Ignition Coil › Component Information6 pages
    Specifications2 3 4
    Testing and Inspection › Ignition Coil Test2
  - Sensors and Switches - Ignition System21 pages
    Camshaft Position Sensor › Component Information › Locations2 3 4 5
    Crankshaft Position Sensor › Component Information12 pages
    Specifications
    Locations › Component Locations2
    Description and Operation › With Automatic Transmission2 3 4
    Testing and Inspection › Component Test2 3
    Service and Repair › With Automatic Transmission2
    Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Description and Operation2 3 4
  - Spark Plug › Component Information8 pages
    Specifications2 3 4 5 6
    Service and Repair › Procedures2
- Transmission Control Systems21 pages
  - Actuators and Solenoids - Transmission and Drivetrain › Actuators and Solenoids - A/T7 pages
    Pressure Regulating Solenoid, A/T › Component Information › Technical Service Bulletins4 pages
    All Technical Service Bulletins for Pressure Regulating Solenoid: › 21-08-99 › Apr › 99 › A/T - Buzz/Whining in Reverse When Cold2
    Customer Interest for Pressure Regulating Solenoid: › 21-08-99 › Apr › 99 › A/T - Buzz/Whining in Reverse When Cold2
    Shift Solenoid, A/T › Component Information › Locations
    Torque Converter Clutch Solenoid, A/T › Component Information › Locations2
  - Lamps and Indicators - Transmission and Drivetrain4 pages
    Lamps and Indicators - A/T › Shift Indicator › Component Information › Description and Operation2
    Lamps and Indicators - Transfer Case › Four-Wheel Drive (4WD) Indicator Lamp <--> [Four Wheel Drive Indicator Lamp] › Component Information › Description and Operation2
  - Relays and Modules - Transmission and Drivetrain › Relays and Modules - A/T › Control Module, A/T › Component Information › Technical Service Bulletins6 pages
    All Technical Service Bulletins for Control Module: › 21-04-00 › Jun › 00 › TCM - MIL ON/DTC P1763 Set2 3
    Customer Interest for Control Module: › 21-04-00 › Jun › 00 › TCM - MIL ON/DTC P1763 Set2 3
  - Sensors and Switches - Transmission and Drivetrain › Sensors and Switches - A/T4 pages
    Transmission Position Switch/Sensor, A/T › Component Information › Locations2
    Transmission Speed Sensor, A/T › Component Information › Locations2
- PROM - Programmable Read Only Memory › Component Information › Technical Service Bulletins100 pages
  - All Technical Service Bulletins for PROM - Programmable Read Only Memory:40 pages
    E22 › Aug › 06 › Recall - PCM Reflash/Inspect/Replace Catalytic Converter2 3 4 5 6 7 8 9 10 11
    18-037-05 › Oct › 05 › Engine Controls - Flash Programming Failure Recovery2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
    18-08-00 › Jun › 00 › MIL ON, Erroneous DTC P0107 Set2 3
    25-02-98 › Oct › 98 › I/M Testing - OBDII CARB Readiness Monitor Information2 3 4
    18-36-97 › Dec › 97 › PCM - Incorrect Fault Mature Time for DTC#B72
  - Customer Interest:9 pages
    18-08-00 › Jun › 00 › MIL ON, Erroneous DTC P0107 Set2 3
    25-02-98 › Oct › 98 › I/M Testing - OBDII CARB Readiness Monitor Information2 3 4
    18-36-97 › Dec › 97 › PCM - Incorrect Fault Mature Time for DTC#B72
  - Recalls: › E22 › Aug › 06 › Recall - PCM Reflash/Inspect/Replace Catalytic Converter2 3 4 5 6 7 8 9 10 11
  - All Other Service Bulletins for PROM - Programmable Read Only Memory:31 pages
    E22 › Aug › 06 › Recall - PCM Reflash/Inspect/Replace Catalytic Converter2 3 4 5 6 7 8 9 10 11
    18-037-05 › Oct › 05 › Engine Controls - Flash Programming Failure Recovery2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
  - All Other Service Bulletins for PROM - Programmable Read Only Memory:9 pages
    18-037-05 › Oct › 05 › Engine Controls - Flash Programming Failure Recovery
    18-08-00 › Jun › 00 › MIL ON, Erroneous DTC P0107 Set2 3
    25-02-98 › Oct › 98 › I/M Testing - OBDII CARB Readiness Monitor Information2 3 4
    18-36-97 › Dec › 97 › PCM - Incorrect Fault Mature Time for DTC#B72
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