XJ (X350) V8-4.2L SC (2004): Powertrain Management

Also for this vehicle: XJ (X308) V8-4.0L SC (2003), XJ (X350) V8-4.2L (2005), XJ (X351) V8-5.0L SC (2010), XJ (X350) Factory Service Manual (2003.5-2004).

Choose Sections to see everything in a chapter, or a chapter title to start at its first page.

1. 01Relays and ModulesRelays and Modules: Sections
2. 02Sensors and SwitchesSensors and Switches: Sections
3. 03MaintenanceMaintenance: Sections
4. 04Engine, Cooling and ExhaustEngine, Cooling and Exhaust: Sections
5. 05Powertrain ManagementPowertrain Management: Sections
   • Relays and Modules - Powertrain Management25 pages

     • Relays and Modules - Computers and Control Systems18 pages

       • Electronic Throttle Actuator Relay › Component Information › Locations2
       • Engine Control Module › Component Information14 pages

         • Technical Service Bulletins4 pages

           • All Technical Service Bulletins for Engine Control Module: › JTB00188 › Apr › 10 › Engine Controls - MIL ON/DTC P1254 Set2
           • Customer Interest for Engine Control Module: › JTB00188 › Apr › 10 › Engine Controls - MIL ON/DTC P1254 Set2
         • Diagrams › Connector Views234567
         • Description and Operation › Engine Control Module23
       • Main Relay (Computer/Fuel System) › Component Information › Locations2
     • Relays and Modules - Fuel Delivery and Air Induction5 pages

       • Fuel Pump Control Unit › Component Information › Locations
       • Fuel Pump Relay › Component Information › Locations2
       • Main Relay (Computer/Fuel System) › Component Information › Locations2
     • Relays and Modules - Ignition System › Ignition Relay › Component Information › Locations2
   • Sensors and Switches - Powertrain Management133 pages

     • Sensors and Switches - Computers and Control Systems74 pages

       • Accelerator Pedal Position Sensor › Component Information › Description and Operation
       • Air Flow Meter/Sensor › Component Information5 pages

         • Locations
         • Description and Operation › Basic234
       • Camshaft Position Sensor › Component Information15 pages

         • Locations23
         • Service and Repair › Camshaft Position (CMP) Sensor LH23456789101112
       • Coolant Temperature Sensor/Switch (For Computer) › Component Information9 pages

         • Locations2
         • Description and Operation › Engine Coolant Temperature Sensor234
         • Service and Repair › Engine Coolant Temperature (ECT) Sensor - 21190023
       • Crankshaft Position Sensor › Component Information › Locations2345
       • Engine Speed Sensor › Component Information › Description and Operation
       • Engine Temperature Sensor › Component Information › Description and Operation
       • Fuel Level Sensor › Component Information4 pages

         • Description and Operation
         • Service and Repair › Fuel Level Sender LH - VIN Range: G45704->G9999923
       • Fuel Pressure Sensor › Component Information › Description and Operation
       • Fuel Tank Pressure Sensor › Component Information3 pages

         • Locations
         • Description and Operation › Fuel Tank Pressure Sensor Circuit2
       • Intake Air Temperature Sensor › Component Information3 pages

         • Locations
         • Description and Operation › Intake Air Temperature Sensor2
       • Intake Air Temperature Switch › Component Information › Description and Operation
       • Knock Sensor › Component Information › Description and Operation
       • Manifold Pressure/Vacuum Sensor › Component Information9 pages

         • Locations23
         • Service and Repair › 4.2L, Vehicles With: Supercharger23456
       • Oil Temperature Sensor For ECM › Component Information › Locations234
       • Oxygen Sensor › Component Information8 pages

         • Technical Service Bulletins › Engine Controls - Removal of Seized Oxygen (O2) Sensors2
         • Description and Operation › Catalyst Efficiency Monitor23
         • Service and Repair › Catalyst Monitor Sensor23
       • Throttle Position Sensor › Component Information › Locations23
     • Sensors and Switches - Fuel Delivery and Air Induction26 pages

       • Accelerator Pedal Position Sensor › Component Information › Description and Operation
       • Air Flow Meter/Sensor › Component Information5 pages

         • Locations
         • Description and Operation › Basic234
       • Fuel Pressure Sensor/Switch › Component Information6 pages

         • Locations2
         • Description and Operation › Fuel Rail Pressure Sensor234
       • Fuel Temperature Sensor › Component Information › Locations23456
       • Inertia Fuel Shutoff Switch › Component Information › Locations2345
       • Throttle Position Sensor › Component Information › Locations23
     • Sensors and Switches - Ignition System33 pages

       • Camshaft Position Sensor › Component Information15 pages

         • Locations23
         • Service and Repair › Camshaft Position (CMP) Sensor LH23456789101112
       • Crankshaft Position Sensor › Component Information › Locations2345
       • Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Technical Service Bulletins12 pages

         • All Technical Service Bulletins: › JTB00106 › Jun › 08 › Keyless Entry - Can't Lock Vehicle Using Remote Fob2345
         • Customer Interest: › JTB00106 › Jun › 08 › Keyless Entry - Can't Lock Vehicle Using Remote Fob2345
         • All Other Service Bulletins for Ignition Switch Lock Cylinder: › XJ501-05 › Nov › 03 › Interior - Loss of Seat Memory2
         • All Other Service Bulletins for Ignition Switch Lock Cylinder: › XJ501-05 › Nov › 03 › Interior - Loss of Seat Memory
       • Knock Sensor › Component Information › Description and Operation
   • Tune-up and Engine Performance Checks24 pages

     • Fuel Pressure › System Information › Specifications
     • Air Cleaner Housing8 pages

       • Air Cleaner Fresh Air Duct/Hose › Component Information › Technical Service Bulletins6 pages

         • All Technical Service Bulletins: › XJ303-08 › Jun › 05 › Engine - Rough Idle/Poor Performance/DTC's Set2
         • Customer Interest: › XJ303-08 › Jun › 05 › Engine - Rough Idle/Poor Performance/DTC's Set2
         • All Other Service Bulletins for Air Cleaner Fresh Air Duct/Hose: › JTB00190 › Jun › 10 › Wipers/Washers - Wipers Won't Park Correctly2
         • All Other Service Bulletins for Air Cleaner Fresh Air Duct/Hose: › JTB00190 › Jun › 10 › Wipers/Washers - Wipers Won't Park Correctly
       • Air Filter Element › Component Information › Locations2
     • Fuel Filter › Fuel Pressure Release › System Information › Service Precautions23
     • Firing Order › Component Information › Specifications
     • Ignition Timing › Number One Cylinder › Component Information › Locations
     • Spark Plug › Component Information › Specifications23
     • Compression Check › System Information › Specifications2
     • Valve Clearance › System Information › Specifications2345
   • Computers and Control Systems269 pages

     • Accelerator Pedal Position Sensor › Component Information › Description and Operation
     • Air Flow Meter/Sensor › Component Information5 pages

       • Locations
       • Description and Operation › Basic234
     • Intake Air Temperature Sensor › Component Information3 pages

       • Locations
       • Description and Operation › Intake Air Temperature Sensor2
     • Intake Air Temperature Switch › Component Information › Description and Operation
     • Camshaft Position Sensor › Component Information15 pages

       • Locations23
       • Service and Repair › Camshaft Position (CMP) Sensor LH23456789101112
     • Coolant Temperature Sensor/Switch (For Computer) › Component Information9 pages

       • Locations2
       • Description and Operation › Engine Coolant Temperature Sensor234
       • Service and Repair › Engine Coolant Temperature (ECT) Sensor - 21190023
     • Crankshaft Position Sensor › Component Information › Locations2345
     • Electronic Throttle Actuator › Component Information › Description and Operation
     • Electronic Throttle Actuator Relay › Component Information › Locations2
     • Engine Control Module › Component Information16 pages

       • Technical Service Bulletins6 pages

         • All Technical Service Bulletins: › JTB00188 › Apr › 10 › Engine Controls - MIL ON/DTC P1254 Set2
         • Customer Interest: › JTB00188 › Apr › 10 › Engine Controls - MIL ON/DTC P1254 Set2
         • All Other Service Bulletins for Engine Control Module: › XJ419-05 › Apr › 05 › Cell Phone - Voice Transmission Difficulties2
         • All Other Service Bulletins for Engine Control Module: › XJ419-05 › Apr › 05 › Cell Phone - Voice Transmission Difficulties
       • Diagrams › Connector Views234567
       • Description and Operation › Engine Control Module23
     • Engine Speed Sensor › Component Information › Description and Operation
     • Engine Temperature Sensor › Component Information › Description and Operation
     • Fuel Level Sensor › Component Information4 pages

       • Description and Operation
       • Service and Repair › Fuel Level Sender LH - VIN Range: G45704->G9999923
     • Fuel Pressure Sensor › Component Information › Description and Operation
     • Fuel Tank Pressure Sensor › Component Information3 pages

       • Locations
       • Description and Operation › Fuel Tank Pressure Sensor Circuit2
     • Idle Speed/Throttle Actuator - Electronic › Component Information › Description and Operation
     • Information Bus › Component Information78 pages

       • Locations2
       • Diagrams › Diagram Information and Instructions234567891011121314151617181920…37
       • Description and Operation › Principles of Operation2
       • Testing and Inspection › Initial Inspection and Diagnostic Overview234567891011121314151617181920…37
     • Knock Sensor › Component Information › Description and Operation
     • Main Relay (Computer/Fuel System) › Component Information › Locations2
     • Manifold Pressure/Vacuum Sensor › Component Information9 pages

       • Locations23
       • Service and Repair › 4.2L, Vehicles With: Supercharger23456
     • Oil Temperature Sensor For ECM › Component Information › Locations234
     • Oxygen Sensor › Component Information8 pages

       • Technical Service Bulletins › Engine Controls - Removal of Seized Oxygen (O2) Sensors2
       • Description and Operation › Catalyst Efficiency Monitor23
       • Service and Repair › Catalyst Monitor Sensor23
     • Relays and Modules - Computers and Control Systems18 pages

       • Electronic Throttle Actuator Relay › Component Information › Locations2
       • Engine Control Module › Component Information14 pages

         • Technical Service Bulletins4 pages

           • All Technical Service Bulletins for Engine Control Module: › JTB00188 › Apr › 10 › Engine Controls - MIL ON/DTC P1254 Set2
           • Customer Interest for Engine Control Module: › JTB00188 › Apr › 10 › Engine Controls - MIL ON/DTC P1254 Set2
         • Diagrams › Connector Views234567
         • Description and Operation › Engine Control Module23
       • Main Relay (Computer/Fuel System) › Component Information › Locations2
     • Sensors and Switches - Computers and Control Systems74 pages

       • Accelerator Pedal Position Sensor › Component Information › Description and Operation
       • Air Flow Meter/Sensor › Component Information5 pages

         • Locations
         • Description and Operation › Basic234
       • Camshaft Position Sensor › Component Information15 pages

         • Locations23
         • Service and Repair › Camshaft Position (CMP) Sensor LH23456789101112
       • Coolant Temperature Sensor/Switch (For Computer) › Component Information9 pages

         • Locations2
         • Description and Operation › Engine Coolant Temperature Sensor234
         • Service and Repair › Engine Coolant Temperature (ECT) Sensor - 21190023
       • Crankshaft Position Sensor › Component Information › Locations2345
       • Engine Speed Sensor › Component Information › Description and Operation
       • Engine Temperature Sensor › Component Information › Description and Operation
       • Fuel Level Sensor › Component Information4 pages

         • Description and Operation
         • Service and Repair › Fuel Level Sender LH - VIN Range: G45704->G9999923
       • Fuel Pressure Sensor › Component Information › Description and Operation
       • Fuel Tank Pressure Sensor › Component Information3 pages

         • Locations
         • Description and Operation › Fuel Tank Pressure Sensor Circuit2
       • Intake Air Temperature Sensor › Component Information3 pages

         • Locations
         • Description and Operation › Intake Air Temperature Sensor2
       • Intake Air Temperature Switch › Component Information › Description and Operation
       • Knock Sensor › Component Information › Description and Operation
       • Manifold Pressure/Vacuum Sensor › Component Information9 pages

         • Locations23
         • Service and Repair › 4.2L, Vehicles With: Supercharger23456
       • Oil Temperature Sensor For ECM › Component Information › Locations234
       • Oxygen Sensor › Component Information8 pages

         • Technical Service Bulletins › Engine Controls - Removal of Seized Oxygen (O2) Sensors2
         • Description and Operation › Catalyst Efficiency Monitor23
         • Service and Repair › Catalyst Monitor Sensor23
       • Throttle Position Sensor › Component Information › Locations23
     • Throttle Position Sensor › Component Information › Locations23
     • Variable Valve Timing Solenoid › Component Information › Locations23
   • Emission Control Systems30 pages

     • Catalytic Converter › Component Information › Locations2345
     • Evaporative Emissions System16 pages

       • Canister Purge Control Valve › Component Information › Locations23
       • Evaporative Emission Control Canister › Component Information › Locations234567891011
       • Leak Detection Valve, Evaporative System › Component Information › Locations
       • Refueling Vapor Recovery System › System Information › Locations
     • Exhaust Gas Recirculation8 pages

       • EGR Tube › Component Information › Service and Repair
       • EGR Valve › Component Information › Description and Operation234567
     • Positive Crankcase Ventilation › Component Information › Description and Operation
   • Fuel Delivery and Air Induction157 pages

     • Fuel Pressure › System Information › Specifications
     • Fuel Pressure Release › System Information › Service Precautions23
     • Accelerator Pedal › Component Information › Specifications2345
     • Accelerator Pedal Position Sensor › Component Information › Description and Operation
     • Air Cleaner Housing6 pages

       • Air Cleaner Fresh Air Duct/Hose › Component Information › Technical Service Bulletins4 pages

         • All Technical Service Bulletins for Air Cleaner Fresh Air Duct/Hose: › XJ303-08 › Jun › 05 › Engine - Rough Idle/Poor Performance/DTC's Set2
         • Customer Interest for Air Cleaner Fresh Air Duct/Hose: › XJ303-08 › Jun › 05 › Engine - Rough Idle/Poor Performance/DTC's Set2
       • Air Filter Element › Component Information › Locations2
     • Air Flow Meter/Sensor › Component Information5 pages

       • Locations
       • Description and Operation › Basic234
     • Fuel › Component Information › Specifications
     • Fuel Filter › Fuel Pressure Release › System Information › Service Precautions23
     • Fuel Injector › Fuel Injector Wiring Harness › Component Information › Locations234
     • Fuel Line Coupler › Component Information › Service and Repair › Quick Release Coupling2345
     • Fuel Pressure Sensor/Switch › Component Information6 pages

       • Locations2
       • Description and Operation › Fuel Rail Pressure Sensor234
     • Fuel Pump4 pages

       • Fuel Pressure › System Information › Specifications
       • Fuel Pump Control Unit › Component Information › Locations
       • Fuel Pump Relay › Component Information › Locations2
     • Fuel Rail › Component Information › Locations2
     • Fuel Tank22 pages

       • Fuel Filler Hose › Component Information › Locations2345678
       • Fuel Gauge Sender › Component Information › Technical Service Bulletins14 pages

         • All Technical Service Bulletins for Fuel Gauge Sender:7 pages

           • XJ310-03 › Oct › 05 › Fuel System - Fuel Level Sender Availability/Replacement2345
           • XJ310-01 › Apr › 04 › Instruments - Erratic Fuel Gauge Readings2
         • Customer Interest: › XJ310-01 › Apr › 04 › Instruments - Erratic Fuel Gauge Readings2
         • All Other Service Bulletins for Fuel Gauge Sender: › XJ310-03 › Oct › 05 › Fuel System - Fuel Level Sender Availability/Replacement2345
     • Fuel Tank Unit › Component Information › Locations234567891011121314
     • Fuel Temperature Sensor › Component Information › Locations23456
     • Idle Speed/Throttle Actuator - Electronic › Component Information › Description and Operation
     • Inertia Fuel Shutoff Switch › Component Information › Locations2345
     • Intake Air Duct › Component Information › Locations2
     • Main Relay (Computer/Fuel System) › Component Information › Locations2
     • Relays and Modules - Fuel Delivery and Air Induction5 pages

       • Fuel Pump Control Unit › Component Information › Locations
       • Fuel Pump Relay › Component Information › Locations2
       • Main Relay (Computer/Fuel System) › Component Information › Locations2
     • Sensors and Switches - Fuel Delivery and Air Induction26 pages

       • Accelerator Pedal Position Sensor › Component Information › Description and Operation
       • Air Flow Meter/Sensor › Component Information5 pages

         • Locations
         • Description and Operation › Basic234
       • Fuel Pressure Sensor/Switch › Component Information6 pages

         • Locations2
         • Description and Operation › Fuel Rail Pressure Sensor234
       • Fuel Temperature Sensor › Component Information › Locations23456
       • Inertia Fuel Shutoff Switch › Component Information › Locations2345
       • Throttle Position Sensor › Component Information › Locations23
     • Supercharger6 pages

       • Intercooler, Supercharger › Component Information › Service and Repair
       • Supercharger Coolant Pump › Component Information5 pages

         • Description and Operation
         • Service and Repair › Procedures234
     • Throttle Body › Component Information13 pages

       • Technical Service Bulletins › Fuel System - Throttle Body Cleaning Prohibition
       • Service and Repair › Throttle Body23456789101112
     • Throttle Position Sensor › Component Information › Locations23
     • Variable Induction System › Variable Induction Control Valve › Component Information › Locations23456
   • Ignition System65 pages

     • Firing Order › Component Information › Specifications
     • Ignition Timing › Number One Cylinder › Component Information › Locations
     • Camshaft Position Sensor › Component Information15 pages

       • Locations23
       • Service and Repair › Camshaft Position (CMP) Sensor LH23456789101112
     • Crankshaft Position Sensor › Component Information › Locations2345
     • Ignition Coil › Component Information › Locations234
     • Ignition Relay › Component Information › Locations2
     • Knock Sensor › Component Information › Description and Operation
     • Relays and Modules - Ignition System › Ignition Relay › Component Information › Locations2
     • Sensors and Switches - Ignition System31 pages

       • Camshaft Position Sensor › Component Information15 pages

         • Locations23
         • Service and Repair › Camshaft Position (CMP) Sensor LH23456789101112
       • Crankshaft Position Sensor › Component Information › Locations2345
       • Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Technical Service Bulletins10 pages

         • All Technical Service Bulletins for Ignition Switch Lock Cylinder: › JTB00106 › Jun › 08 › Keyless Entry - Can't Lock Vehicle Using Remote Fob2345
         • Customer Interest for Ignition Switch Lock Cylinder: › JTB00106 › Jun › 08 › Keyless Entry - Can't Lock Vehicle Using Remote Fob2345
       • Knock Sensor › Component Information › Description and Operation
     • Spark Plug › Component Information › Specifications23
   • Transmission Control Systems › Relays and Modules - Transmission and Drivetrain › Relays and Modules - A/T › Control Module, A/T › Component Information › Technical Service Bulletins2 pages

     • All Technical Service Bulletins for Control Module: › NHTSA04V024000 › Jan › 04 › Recall 04V024000: Incorrect A/T Gear Selection
     • Recalls for Control Module: › NHTSA04V024000 › Jan › 04 › Recall 04V024000: Incorrect A/T Gear Selection
   • PROM - Programmable Read Only Memory › Component Information › Technical Service Bulletins69 pages

     • All Technical Service Bulletins for PROM - Programmable Read Only Memory:23 pages

       • JTB00188 › Apr › 10 › Engine Controls - MIL ON/DTC P1254 Set2
       • J0043 › Mar › 09 › Recall - ECM/TCM Update For OBD Compliance2
       • JTB000722 › Feb › 09 › A/T Controls - MIL ON/DTC's P0780/P0785/P0829 Set2
       • JTB000712 › Feb › 09 › A/T Controls - Harsh Shifting Concerns23
       • XJ303-09 › Jul › 05 › Engine Controls - Pinging/Detonation on Acceleration2
       • XJ303-07 › Jun › 05 › Engine Controls - Rough Idle After Cold Start
       • XJ303-04 › Dec › 04 › Engine Controls - Engine Detonation/Pinging2
       • XJ303-02 › Jun › 04 › Engine Controls - MIL ON/DTC P0128 Set2
       • 7-23USA › Apr › 04 › Recall - ZF 6 Speed A/T/Incorrect Gear Selection23456
       • NHTSA04V024000 › Jan › 04 › Recall 04V024000: Incorrect A/T Gear Selection
     • Customer Interest:14 pages

       • JTB00188 › Apr › 10 › Engine Controls - MIL ON/DTC P1254 Set2
       • JTB000722 › Feb › 09 › A/T Controls - MIL ON/DTC's P0780/P0785/P0829 Set2
       • JTB000712 › Feb › 09 › A/T Controls - Harsh Shifting Concerns23
       • XJ303-09 › Jul › 05 › Engine Controls - Pinging/Detonation on Acceleration2
       • XJ303-07 › Jun › 05 › Engine Controls - Rough Idle After Cold Start
       • XJ303-04 › Dec › 04 › Engine Controls - Engine Detonation/Pinging2
       • XJ303-02 › Jun › 04 › Engine Controls - MIL ON/DTC P0128 Set2
     • Recalls:9 pages

       • J0043 › Mar › 09 › Recall - ECM/TCM Update For OBD Compliance2
       • 7-23USA › Apr › 04 › Recall - ZF 6 Speed A/T/Incorrect Gear Selection23456
       • NHTSA04V024000 › Jan › 04 › Recall 04V024000: Incorrect A/T Gear Selection
     • All Other Service Bulletins for PROM - Programmable Read Only Memory:9 pages

       • J0043 › Mar › 09 › Recall - ECM/TCM Update For OBD Compliance2
       • 7-23USA › Apr › 04 › Recall - ZF 6 Speed A/T/Incorrect Gear Selection23456
       • NHTSA04V024000 › Jan › 04 › Recall 04V024000: Incorrect A/T Gear Selection
     • All Other Service Bulletins for PROM - Programmable Read Only Memory:14 pages

       • JTB00188 › Apr › 10 › Engine Controls - MIL ON/DTC P1254 Set2
       • JTB000722 › Feb › 09 › A/T Controls - MIL ON/DTC's P0780/P0785/P0829 Set2
       • JTB000712 › Feb › 09 › A/T Controls - Harsh Shifting Concerns23
       • XJ303-09 › Jul › 05 › Engine Controls - Pinging/Detonation on Acceleration2
       • XJ303-07 › Jun › 05 › Engine Controls - Rough Idle After Cold Start
       • XJ303-04 › Dec › 04 › Engine Controls - Engine Detonation/Pinging2
       • XJ303-02 › Jun › 04 › Engine Controls - MIL ON/DTC P0128 Set2
6. 06Transmission and DrivetrainTransmission and Drivetrain: Sections
7. 07Brakes and Traction ControlBrakes and Traction Control: Sections
8. 08Starting and ChargingStarting and Charging: Sections
9. 09Power and Ground DistributionPower and Ground Distribution: Sections
10. 10Steering and SuspensionSteering and Suspension: Sections
11. 11Heating and Air ConditioningHeating and Air Conditioning: Sections
12. 12Restraint SystemsRestraint Systems: Sections
13. 13Accessories and Optional EquipmentAccessories and Optional Equipment: Sections
14. 14Body and FrameBody and Frame: Sections
15. 15Cruise ControlCruise Control: Sections
16. 16Instrument Panel, Gauges and Warning IndicatorsInstrument Panel, Gauges and Warning Indicators: Sections
17. 17Lighting and HornsLighting and Horns: Sections
18. 18Windows and GlassWindows and Glass: Sections
19. 19Wiper and Washer SystemsWiper and Washer Systems: Sections