Engine Controls - 4.6l (lh2) - Introduction (2 of 2) Cadillac XLR I

Temperature Versus Resistance

Temperature Versus Resistance

Altitude Versus Barometric Pressure

Altitude Versus Barometric Pressure

Ignition System Specifications

Ignition System Specifications

Fastener Tightening Specifications

Fastener Tightening Specifications

Emissions Related DTCs

Action Taken When the DTC Sets - Type A

1. The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
2. The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.

Action Taken When the DTC Sets - Type B

1. The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
2. The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

Conditions for Clearing the MIL/DTC - Type A or Type B

1. The control module turns OFF the malfunction indicator lamp (MIL) after 4 consecutive ignition cycles that the diagnostic runs and does not fail.
2. A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
3. A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
4. Clear the MIL and the DTC with a scan tool.

Non-Emissions Related DTCs

Action Taken When the DTC Sets - Type C

1. The control module stores the DTC information into memory when the diagnostic runs and fails.
2. The malfunction indicator lamp (MIL) will not illuminate.
3. The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
4. The driver information center, if equipped, may display a message.

Conditions for Clearing the DTC - Type C

1. A current DTC Last Test Failed clears when the diagnostic runs and passes.
2. A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
3. Clear the DTC with a scan tool.

Conditions for Clearing the DTC - Type X

Diagnostic Trouble Code (DTC) Types

Diagnostic Trouble Code (DTC) Types

Scheme 1

Scheme 2

Engine Controls Schematic Icons

Engine Controls Schematic Icons Icon Icon Definition NOTE: The OBD II symbol is used on the circuit diagrams in order to alert the technician that the circuit is essential for proper OBD II emission control circuit operation. Any circuit which fails and causes the malfunction indicator lamp (MIL) to turn ON, or causes emissions-related component damage, is identified as an OBD II circuit. IMPORTANT: Twisted-pair wires provide an effective shield that helps protect sensitive electronic components from electrical interference. If the wires were covered with shielding, install new shielding. In order to prevent electrical interference from degrading the performance of the connected components, you must maintain the proper specification when making any repairs to the twisted-pair wires shown : The wires must be twisted a minimum of 9 turns per 31 cm (12 in) as measured anywhere along the length of the wires The outside diameter of the twisted wires must not exceed 6.0 mm (0.25 in)

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Scheme 13

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Scheme 27

Engine Control Module Connector End Views

Engine Control Module (ECM) - C1

Scheme 28

Engine Control Module Connector End Views

Engine Control Module (ECM) - C2

Scheme 29

Engine Control Module Connector End Views

Engine Control Module (ECM) - C3

Scheme 30

Engine Controls Connector End Views

Accelerator Pedal Position (APP) Sensor

Scheme 31

Engine Controls Connector End Views

Camshaft Position (CMP) Actuator Solenoid Bank 1 Exhaust

Camshaft Position (CMP) Actuator Solenoid Bank 1 Intake

Engine Controls Connector End Views

Camshaft Position (CMP) Actuator Solenoid Bank 1 Intake

Camshaft Position (CMP) Actuator Solenoid Bank 2 Exhaust

Engine Controls Connector End Views

Camshaft Position (CMP) Actuator Solenoid Bank 2 Exhaust

Camshaft Position (CMP) Actuator Solenoid Bank 2 Intake

Engine Controls Connector End Views

Camshaft Position (CMP) Actuator Solenoid Bank 2 Intake

Scheme 32

Engine Controls Connector End Views

Camshaft Position (CMP) Sensor Bank 1 Exhaust

Camshaft Position (CMP) Sensor Bank 1 Intake

Engine Controls Connector End Views

Camshaft Position (CMP) Sensor Bank 1 Intake

Camshaft Position (CMP) Sensor Bank 2 Exhaust

Engine Controls Connector End Views

Camshaft Position (CMP) Sensor Bank 2 Exhaust

Camshaft Position (CMP) Sensor Bank 2 Intake

Engine Controls Connector End Views

Camshaft Position (CMP) Sensor Bank 2 Intake

Scheme 33

Engine Controls Connector End Views

Crankshaft Position (CKP) Sensor

Scheme 34

Engine Controls Connector End Views

Engine Coolant Temperature (ECT) Sensor

Scheme 35

Engine Controls Connector End Views

Evaporative Emissions (EVAP) Canister Purge Valve

Scheme 36

Engine Controls Connector End Views

Evaporative Emissions (EVAP) Canister Vent Solenoid

Scheme 37

Engine Controls Connector End Views

Fuel Injector 1

Fuel Injector 2

Engine Controls Connector End Views

Fuel Injector 2

Fuel Injector 3

Engine Controls Connector End Views

Fuel Injector 3

Fuel Injector 4

Engine Controls Connector End Views

Fuel Injector 4

Fuel Injector 5

Engine Controls Connector End Views

Fuel Injector 5

Fuel Injector 6

Engine Controls Connector End Views

Fuel Injector 6

Fuel Injector 7

Engine Controls Connector End Views

Fuel Injector 7

Fuel Injector 8

Engine Controls Connector End Views

Fuel Injector 8

Scheme 38

Engine Controls Connector End Views

Fuel Pump and Sender Assembly

Scheme 39

Engine Controls Connector End Views

Fuel Tank Pressure Sensor

Scheme 40

Engine Controls Connector End Views

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1

Scheme 41

Engine Controls Connector End Views

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Engine Controls Connector End Views

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2

Engine Controls Connector End Views

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2

Scheme 42

Engine Controls Connector End Views

Ignition Coil/Module 1

Ignition Coil/Module 2

Engine Controls Connector End Views

Ignition Coil/Module 2

Ignition Coil/Module 3

Engine Controls Connector End Views

Ignition Coil/Module 3

Ignition Coil/Module 4

Engine Controls Connector End Views

Ignition Coil/Module 4

Ignition Coil/Module 5

Engine Controls Connector End Views

Ignition Coil/Module 5

Ignition Coil/Module 6

Engine Controls Connector End Views

Ignition Coil/Module 6

Ignition Coil/Module 7

Engine Controls Connector End Views

Ignition Coil/Module 7

Ignition Coil/Module 8

Engine Controls Connector End Views

Ignition Coil/Module 8

Scheme 43

Engine Controls Connector End Views

Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor

Scheme 44

Engine Controls Connector End Views

Knock Sensor (KS) Bank 1

Knock Sensor (KS) Bank 2

Engine Controls Connector End Views

Knock Sensor (KS) Bank 2

Scheme 45

Engine Controls Connector End Views

Manifold Absolute Pressure (MAP) Sensor

Scheme 46

Engine Controls Connector End Views

Throttle Actuator Control Module

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Engine Control Module Replacement

Engine control module (ECM) service should normally consist of either ECM replacement or EEPROM programming. If the diagnostic procedures require ECM replacement, check the ECM first to see if the correct part is being used.

Note. Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) in order to prevent internal control module damage. Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery. In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board. Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module. The replacement control module must be programmed.

Removal Procedure

1. Using a scan tool, retrieve the percentage of remaining engine oil and the remaining automatic transmission fluid life. Record the remaining engine oil and the remaining automatic transmission fluid life.
2. Remove the right front wheelhouse filler panel. Refer to «Wheelhouse Filler Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
3. Disconnect the ECM electrical harness connectors (2).
4. Remove the fasteners (2) from the ECM (3).

Installation Procedure

1. Install the ECM (3) to the ECM bracket (4).
2. Install the ECM retaining fasteners (2). Tighten: Tighten the ECM retaining fasteners to 3.0 N.m (27 lb in).
3. Connect the electrical connectors (2) to the ECM (3).
4. Install the right front wheelhouse filler panel. Refer to «Wheelhouse Filler Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
5. If a new ECM is being installed, program the ECM. Refer to «Control Module References»(/cadillac/xlr/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) in Computer/Integrating Systems.

Crankshaft Position System Variation Learn

1. Install a scan tool.
2. Monitor the ECM for DTCs with a scan tool. If other DTCs are set, except DTC P0315, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-trouble-code-dtc-list) for the applicable DTC that set.
3. With a scan tool, select the CKP system variation learn procedure within the Module Setup menu and perform the following: Observe the fuel cut-off for the applicable engine. Block the drive wheels. Set the parking brake. Place the vehicle's transmission in Park or Neutral. Turn the air conditioning (A/C) OFF. Cycle the ignition from OFF to ON. Apply and hold the brake pedal for the duration of the procedure. Start and idle the engine. Accelerate to wide open throttle (WOT). The engine should not accelerate beyond the calibrated fuel cut-off RPM value noted in step 3.1. Release the throttle immediately if the value is exceeded. IMPORTANT: While the learn procedure is in progress, release the throttle immediately when the engine starts to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete. Release the throttle when fuel cut-off occurs.
4. The scan tool displays Learn Status: Learned this Ignition. If the scan tool indicates that DTC P0315 ran and passed, the CKP variation learn procedure is complete. If the scan tool indicates DTC P0315 failed or did not run, or if any other DTCs set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/xlr/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information__diagnostic-trouble-code-dtc-list) for the applicable DTC that set.
5. Turn OFF the ignition for 30 seconds after the learn procedure is completed successfully.

Note. Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

1. Turn OFF the ignition
2. Drain the coolant to below the level of the engine coolant temperature (ECT) sensor. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/xlr/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) or «Cooling System Draining and Filling (GE 47716)»(/cadillac/xlr/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
3. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
4. Disconnect the ECT sensor harness connector.
5. Remove the ECT sensor from the right-hand cylinder head.

Note. Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

Note. Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.

1. Coat the sensor threads with sealer GM P/N 1050805, or equivalent.
2. Install the ECT sensor (1). Tighten: Tighten the ECT sensor to 20 N.m (15 lb ft).
3. Connect the ECT sensor harness connector.
4. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
5. Refill the coolant system. Refer to «Cooling System Draining and Filling (Static Fill)»(/cadillac/xlr/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-static) or «Cooling System Draining and Filling (GE 47716)»(/cadillac/xlr/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .

Tools Required

J 22610 Service Boot Clamp Installer. See Special Tools .

1. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
2. Remove the air intake duct clamps from the MAF/IAT sensor and the throttle body.
3. Remove the MAF/IAT sensor.

1. Install the MAF/IAT sensor into the air intake duct at the air cleaner housing.
2. Install the air intake duct to the MAF/IAT sensor and the throttle body.
3. Install the clamps.
4. Connect the electrical connector of the MAF/IAT.

1. Turn the ignition OFF.
2. Disconnect the MAP sensor electrical connector.
3. Remove the MAP sensor from the intake manifold.
4. Inspect the MAP sensor grommet for wear or damage. If a problem is found, replace as necessary.

1. Install the MAP sensor into the intake manifold. Tighten: Tighten the bolt to 12 N.m (106 lb in).
2. Connect the MAP sensor electrical connector.

Note. Refer to OXYGEN SENSOR NOTICE .

1. Release the lock tab, and disconnect the PCV foul air tube (1) from the PCV orifice fitting on the right camshaft cover. Refer to «Crankcase Ventilation Hoses/Pipes Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-44l-1-of-5) .
2. Separate the bank 1, sensor 1 electrical connector assembly (1) from the fuel rail bracket.
3. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.
4. Using a small screw driver, remove the electrical connector retainer from the electrical connector.
5. Separate the bank 1, sensor 2 electrical connector assembly (1) from the fuel rail bracket.
6. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.
7. Remove both oxygen sensor electrical connectors and wires from under the two engine wire harnesses.
8. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
9. Remove the oxygen sensor wire harnesses from the retainer (1) at the rear of the engine.
10. Note the wire routing for reassembly.
11. Gently pull the bank 1 sensor 1 oxygen sensor (2) wire harness and connector down from the engine compartment.
12. Remove the bank 1 sensor 1 oxygen sensor (2) from the exhaust manifold.

1. Install the bank 1 sensor 1 oxygen sensor (2) to the exhaust manifold. Tighten: Tighten the heated oxygen sensor (HO2S) to 42 N.m (31 lb ft).
2. Lower the vehicle.
3. Pull the exhaust sensor electrical connector and wire harness upward to the engine compartment.
4. Route both oxygen sensor electrical connectors and wires under the two engine wire harnesses.
5. Install the electrical connector retainer to the electrical connector.
6. Connect both oxygen sensor electrical connectors to the engine wiring harness connectors.
7. Install both oxygen sensor electrical connector assemblies (1, 2) to the fuel rail brackets.
8. Connect the PCV foul air tube (1) to the PCV orifice fitting on the right camshaft cover. Refer to «Crankcase Ventilation Hoses/Pipes Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-44l-1-of-5) .
9. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
10. Install the oxygen sensor wire harnesses to the retainer (1) at the rear of the engine. Ensure that the wire harnesses are secure and away from hot exhaust components.
11. Lower the vehicle.

Note. Refer to OXYGEN SENSOR NOTICE .

1. Release the lock tab, and disconnect the PCV foul air tube (1) from the PCV orifice fitting on the right camshaft cover. Refer to «Crankcase Ventilation Hoses/Pipes Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-44l-1-of-5) .
2. Separate the bank 1, sensor 1 electrical connector assembly (1) from the fuel rail bracket.
3. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.
4. Separate the bank 1, sensor 2 electrical connector assembly (1) from the fuel rail bracket.
5. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.
6. Remove both oxygen sensor electrical connectors and wires from under the two engine wire harnesses.
7. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
8. Remove the oxygen sensor wire harnesses from the retainer (1) at the rear of the engine.
9. Note the wire routing for reassembly.
10. Gently pull the bank 1 sensor 2 oxygen sensor (1) wire harness down from the engine compartment.
11. Remove the bank 1 sensor 2 oxygen sensor (1) from the exhaust manifold.

1. Install the bank 1 sensor 2 oxygen sensor (1) to the exhaust manifold. Tighten: Tighten the heated oxygen sensor (HO2S) to 42 N.m (31 lb ft).
2. Lower the vehicle.
3. Pull the exhaust sensor electrical connector and wire harness upward to the engine compartment.
4. Route both oxygen sensor electrical connectors and wires under the two engine wire harnesses.
5. Connect both oxygen sensor electrical connectors to the engine wiring harness connectors.
6. Install both oxygen sensor electrical connector assemblies (1, 2) to the fuel rail brackets.
7. Connect the PCV foul air tube to the PCV orifice fitting on the right camshaft cover. Refer to «Crankcase Ventilation Hoses/Pipes Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-44l-1-of-5) .
8. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
9. Install the oxygen sensor wire harnesses to the retainer (1) at the rear of the engine. Ensure that the wire harnesses are secure and away from hot exhaust components.
10. Lower the vehicle.

Note. Refer to OXYGEN SENSOR NOTICE .

1. Separate the bank 2, sensor 1 electrical connector assembly (1) from the fuel rail bracket.
2. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.
3. Using a small screw driver, remove the electrical connector retainer from the electrical connector.
4. Separate the bank 2, sensor 2 electrical connector assembly (1) from the fuel rail bracket.
5. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.
6. Disconnect the evaporative emission (EVAP) hose (3) from the chassis bundle at the front of dash. Position the hose aside.
7. Disconnect the brake booster hose and check valve from the brake booster. Position the hose aside.
8. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
9. Remove the oxygen sensor wire harnesses from the retainer (1) at the rear of the engine.
10. Note the wire routing for reassembly.
11. Gently pull the bank 2 sensor 1 oxygen sensor (1) wire harness and connector down from the engine compartment.
12. Remove the bank 2 sensor 1 oxygen sensor (1) from the exhaust manifold.

1. Install the bank 2 sensor 1 oxygen sensor (1) to the exhaust manifold. Tighten: Tighten the heated oxygen sensor (HO2S) to 42 N.m (31 lb ft).
2. Lower the vehicle.
3. Pull the exhaust sensor electrical connector and wire harness upward to the engine compartment.
4. Install the electrical connector retainer to the electrical connector.
5. Connect both oxygen sensor electrical connectors to the engine wiring harness connectors.
6. Install both oxygen sensor electrical connector assemblies (1, 2) to the fuel rail brackets.
7. Connect the brake booster hose and check valve to the brake booster.
8. Connect the evaporative emission (EVAP) hose (3) to the chassis bundle at the front of dash.
9. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
10. Install the oxygen sensor wire harnesses to the retainer (1) at the rear of the engine. Ensure that the wire harnesses are secure and away from hot exhaust components.
11. Lower the vehicle.

Note. Refer to OXYGEN SENSOR NOTICE .

1. Separate the bank 2, sensor 1 electrical connector assembly (1) from the fuel rail bracket.
2. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.
3. Separate the bank 2, sensor 2 electrical connector assembly (1) from the fuel rail bracket.
4. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.
5. Disconnect the evaporative emission (EVAP) hose (3) from the chassis bundle at the front of dash. Position the hose aside.
6. Disconnect the brake booster hose and check valve from the brake booster. Position the hose aside.
7. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
8. Remove the oxygen sensor wire harnesses from the retainer (1) at the rear of the engine.
9. Note the wire routing for reassembly.
10. Gently pull the bank 2 sensor 2 oxygen sensor (2) wire harness and connector down from the engine compartment.
11. Remove the bank 2 sensor 2 oxygen sensor (2) from the exhaust manifold.

1. Install the bank 2 sensor 2 oxygen sensor (2) to the exhaust manifold. Tighten: Tighten the heated oxygen sensor (HO2S) to 42 N.m (31 lb ft).
2. Lower the vehicle.
3. Pull the exhaust sensor electrical connector and wire harness upward to the engine compartment.
4. Install the electrical connector retainer to the electrical connector.
5. Connect both oxygen sensor electrical connectors to the engine wiring harness connectors.
6. Install both oxygen sensor electrical connector assemblies (1, 2) to the fuel rail brackets.
7. Connect the brake booster hose and check valve to the brake booster.
8. Connect the evaporative emission (EVAP) hose (3) to the chassis bundle at the front of dash.
9. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
10. Install the oxygen sensor wire harnesses to the retainer (1) at the rear of the engine. Ensure that the wire harnesses are secure and away from hot exhaust components.
11. Lower the vehicle.

Note. Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.

1. Remove the left instrument panel (I/P) on the lower closeout insulator panel. Refer to «Instrument Panel Insulator Panel Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
2. Disconnect the electrical connector (1) from the accelerator pedal sensor module.
3. Remove the accelerator pedal mounting bolts (1).
4. Remove the accelerator pedal (2).

1. Install the accelerator pedal to the steering column support bracket.
2. Install the accelerator pedal mounting bolts (1). Tighten: Tighten the accelerator pedal mounting bolts to 10 N.m (89 lb in).
3. Connect the accelerator pedal sensor module electrical connector (1).
4. Check for correct carpet fit under the accelerator pedal.
5. Install the left I/P on the lower closeout insulator panel. Refer to «Instrument Panel Insulator Panel Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.

1. Disconnect the mass air flow (MAF) sensor electrical connector.
2. Remove the air intake duct.
3. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
4. Disconnect the throttle body assembly electrical connector.
5. Remove the throttle body attaching bolts.
6. Remove the throttle body and the gasket. IMPORTANT: Do not reuse the throttle body gasket. Install a new gasket during assembly.
7. Discard the throttle body gasket.

1. Install a new throttle body gasket into the groove on rear side of throttle body. Be sure gasket upper and lower tabs (1) are aligned to the throttle body properly.
2. Install the throttle body assembly to the water outlet.
3. Install the throttle body attaching bolts. Tighten: Tighten the throttle body bolts to 10 N.m (89 lb in).
4. Connect the throttle body assembly electrical connector.
5. Install the air intake duct (1).
6. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
7. Connect the mass air flow (MAF) sensor electrical connector.

Throttle Body Inspection and Cleaning

1. Remove the air intake duct.
2. Inspect the throttle body bore and the throttle valve plate for deposits. If necessary, open the throttle valve to inspect all surfaces.
3. Clean the throttle body bore and the throttle valve plate using a clean shop towel with an appropriate cleaning substance, such as one of the following: GM Top Engine Cleaner P/N 1052626 AC-Delco Carburetor Tune-Up Conditioner P/N X66-P
4. Install the air intake duct.

Tool Required

J 34730-1A Fuel Pressure Gage

1. Turn the ignition OFF. CAUTION: Refer to the Battery Disconnect Caution.
2. Disconnect the negative battery cable in order to avoid possible fuel discharge if an accidental attempt is made to start the engine.
3. Loosen the fuel filler cap in order to relieve the fuel tank vapor pressure.
4. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
5. Connect the J 34730-1A to the fuel pressure connection. Wrap a shop towel around the fitting while connecting the gage in order to avoid spillage.
6. Install the bleed hose of the gage into an approved container.
7. Open the valve on the gage to bleed the system pressure. The fuel connections are now safe for servicing.
8. Drain any fuel remaining in the gage into an approved container.

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Install the fuel pressure gage to the fuel pressure service connection, located on the fuel rail.
3. Turn ON the ignition.
4. Place the bleed hose of the fuel pressure gage into an approved gasoline container.
5. Open the bleed valve on the fuel pressure gage in order to bleed the air from the fuel pressure gage.
6. Command the fuel pump ON with a scan tool.
7. Close the bleed valve on the fuel pressure gage.
8. Inspect for fuel leaks.

Metal Collar Quick Connect Fitting Service

Tools Required

1. J 34730-1A Fuel Pressure Gage
2. J 37088-A Tool Set, Fuel Line Quick-Connect Separator

1. Relieve the fuel system pressure before servicing any fuel system connection. Refer to the «Fuel Pressure Relief»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
2. Slide the dust cover from the quick-connect fitting.
3. Blow any dirt out of the fitting, using compressed air.
4. Choose the correct tool from the J 37088-A Tool Set for the size of the fitting. Insert the tool into the female connector, then push inward in order to release the locking tabs.
5. Pull the connection apart.
6. Using a clean shop towel, wipe off the male pipe end.
7. Inspect both ends of the fitting for dirt and burrs. Clean or replace the components as required.

1. Apply a few drops of clean engine oil to the male pipe end.
2. Push both sides of the fitting together in order to cause the retaining tabs to snap into place.
3. Once installed, pull on both sides of the fitting in order to make sure the connection is secure.
4. Reposition the dust cover over the quick-connect fitting.

J 34730-1A Fuel Pressure Gage

1. Relieve the fuel system pressure before servicing any fuel system connection. Refer to the «Fuel Pressure Relief»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
2. Using compressed air, blow any dirt out of the quick-connect fitting.
3. Squeeze the plastic retainer release tabs.
4. Choose the correct tool from the J 37088-A Tool Set for the size of the fitting. Insert the tool into the female connector, then push inward in order to release the locking tabs. The plastic retainer will remain on the female connector.
5. Pull the connection apart.

1. Apply a few drops of clean engine oil to the male fuel pipe end.
2. Push both sides of the quick-connect fitting together in order to cause the retaining tabs/fingers to snap into place.
3. Once installed, pull on both sides of the quick-connect fitting in order to make sure the connection is secure.

J 45004 Fuel Tank Drain Hose

Draining Procedure

Note. Drain the fuel tank with a hose which has a 13 mm (0.5 in) or smaller diameter in order to prevent the drain hose from getting stuck inside the fuel tank filler neck pipe check valve. Damage to the check valve may result.

Note. Drain the fuel from the complete system, including injector nozzle(s), the fuel pump, all fuel pipes, and the fuel tank if a vehicle is to be stored for any appreciable length of time. Draining the fuel will prevent the formations of fuel system deposits.

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
2. Remove the fuel tank filler pipe cap.
3. Drain the fuel through the fuel tank filler pipe using a hand or an air operated fuel pump device and the J 45004 .
4. Remove the driveline support assembly. Refer to «Driveline Support Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) .
5. Remove the crossover tube/hose from the right hand fuel tank.
6. Drain the fuel through the fuel tank crossover connection using a hand or an air operated fuel pump device and the J 45004 .

J 37088-A Fuel Line Disconnect Tool

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Drain the fuel tank. Refer to «Fuel Tank Draining»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the left rear tire. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
5. Remove the left rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
6. Remove both mufflers. Refer to «Exhaust Muffler Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) and «Exhaust Muffler Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) in Engine Exhaust.
7. Remove the driveline support assembly. Refer to «Driveline Support Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) in Propeller Shaft.
8. Disconnect the fuel fill hose and the recirculation line from the fill pipe.
9. Disconnect the fuel pump jumper harness connector.
10. Disconnect the fuel feed pipe (4) at the rear of the left fuel tank. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
11. Cap the fuel pipes to prevent fuel system contamination.
12. Loosen the fuel tank strap in order to drop the tank approximately one inch.
13. Disengage the crossover tube connector position assurance (CPA) retainer by pulling the tab (1) outward and rotate.
14. Rotate crossover tube collar counterclockwise to disengage.
15. Disconnect the crossover tube from the left fuel tank by pulling straight out.
16. Disconnect the evaporative emission (EVAP) crossover pipe (2) quick connect fitting at the left fuel tank.
17. Cap the EVAP pipe to prevent system contamination.
18. Remove the fuel tank strap mount bolts.
19. Remove the fuel tank strap from the vehicle.
20. Remove the fuel tank.

1. Install the fuel tank.
2. Install the fuel tank strap to the vehicle.
3. Install the fuel tank strap bolts loosely leaving the tank hanging approximately 1 inch.
4. Remove the cap from the EVAP pipe.
5. Connect the EVAP crossover pipe (2) quick connect fitting at the left fuel tank.
6. Lubricate the crossover tube to fuel tank connection O-rings (1-4) with P/N 1051717 rubber lubricant.
7. Lubricate the crossover tube O-ring mating surfaces (1-4) with P/N 1051717 rubber lubricant.
8. Connect the crossover tube to the left fuel tank using the features previously noted.
9. Rotate the crossover tube collar (3) clockwise to engage the tangs.
10. Rotate the crossover tube CPA retainer counter-clockwise past the collar latching tang and push the tab (1) into the locked position.
11. Test the crossover tube to fuel tank connection by attempting to rotate the crossover tube collar counterclockwise.
12. Tighten the fuel tank strap bolts. Tighten: Tighten the bolts to 25 N.m (18 lb in).
13. Remove the cap from the fuel pipes.
14. Connect the fuel feed pipe (4) at the rear of the left fuel tank. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
15. Connect the fuel pump jumper harness connector.
16. Connect the fuel fill hose and the recirculation line to the fill tube. Tighten: Tighten the clamp to 3.5 N.m (31 lb in).
17. Install the driveline support assembly. Refer to «Driveline Support Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) in Propeller Shaft.
18. Install both mufflers. Refer to «Exhaust Muffler Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) and «Exhaust Muffler Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) in Engine Exhaust.
19. Install the left rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
20. Install the left rear tire. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
21. Lower the vehicle.
22. Refuel the fuel tank.
23. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
24. Perform the following procedure in order to test for leaks: Turn ON the ignition switch, for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition. Inspect for fuel leaks.
25. Program the transmitters. Refer to «Transmitter Programming (Domestic and Japan)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-domestic-and-japan) or «Transmitter Programming (Export - Including Canada)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-export-including-canada) in Keyless Entry.

J 37088-A Fuel Line Disconnect Tool

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Drain the fuel tank. Refer to «Fuel Tank Draining»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the right rear tire. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
5. Remove the right rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
6. Remove the evaporative emission (EVAP) canister access cover.
7. Disconnect the fuel level vent valve (FLVV) hose (1) at the EVAP canister (2).
8. Disconnect the fuel pump module harness connector.
9. Remove the crossover tube from the clamp located above the transmission.
10. Disengage the crossover tube connector position assurance (CPA) retainer by pulling the tab (1) outward and rotate.
11. Rotate crossover tube collar counterclockwise to disengage.
12. Disconnect the crossover tube from the right fuel tank by pulling the tube straight out of the fuel tank connection.
13. Disconnect the EVAP crossover pipe (2) quick connect fitting at the right fuel tank.
14. Cap the EVAP pipe to prevent system contamination.
15. Remove the fuel tank strap mount bolts.
16. Remove the fuel tank strap from the vehicle.
17. Remove the fuel tank.

1. Install the fuel tank.
2. Install the fuel tank strap to the vehicle.
3. Install the fuel tank strap bolts. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
4. Remove the cap from the EVAP pipe.
5. Connect the EVAP crossover pipe (2) quick connect fitting at the right fuel tank.
6. Lubricate the crossover tube to fuel tank connection O-rings (1-4) with P/N 1051717 rubber lubricant.
7. Lubricate the crossover tube O-ring mating surfaces (1-4) with P/N 1051717 rubber lubricant.
8. Connect the crossover tube to the right fuel tank using the features previously noted.
9. Rotate the crossover tube collar (3) clockwise to engage the tangs.
10. Rotate the crossover tube CPA retainer counterclockwise past the collar latching tang and push the tab (1) into the locked position.
11. Test the crossover tube to fuel tank connection by attempting to rotate the crossover tube collar counterclockwise.
12. Tighten the fuel tank strap bolts. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
13. Snap the crossover tube into the clamp located above the transmission.
14. Connect the fuel pump module harness connector.
15. Connect the FLVV hose (1) at the EVAP Canister (2).
16. Install the EVAP canister access cover.
17. Install the driveline support assembly. Refer to «Driveline Support Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) in Propeller Shaft.
18. Install the right rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
19. Install the right rear tire. Refer to «Tire and Wheel Removal and Installation»(/cadillac/xlr/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
20. Install the left fuel tank. Refer to «Fuel Tank Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

J 37088-A Fuel Line Disconnect Tool

1. Remove the driveline support assembly. Refer to «Driveline Support Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) .
2. Remove the crossover tube (1) from the clamp (2) located above the transmission.
3. Disengage the left crossover tube connector position assurance (CPA) retainer by pulling the tab (1) outward and rotate.
4. Rotate crossover tube collar (3) counterclockwise to disengage.
5. Disconnect the crossover tube from the left fuel tank by pulling the tube straight out of the fuel tank connection.
6. Repeat steps 3-5 for the right side tank.

1. Lubricate the right crossover tube to fuel tank connection O-rings (1-4) with P/N 1051717 rubber lubricant.
2. Lubricate the crossover tube O-ring mating surfaces (1-4) with P/N 1051717 rubber lubricant.
3. Connect the crossover tube to the right fuel tank using the features previously noted.
4. Rotate the crossover tube collar clockwise to engage the tangs.
5. Rotate the crossover tube CPA retainer counterclockwise past the collar latching tang and push the tab (1) into the locked position.
6. Test the crossover tube to fuel tank connection by attempting to rotate the crossover tube collar counterclockwise.
7. Repeat steps 1-6 for the left side fuel tank.
8. Snap the crossover tube into the clamp located above the transmission.
9. Install the driveline support assembly. Refer to «Driveline Support Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) .

1. Remove the right rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
2. Remove the EVAP canister access cover.
3. Disconnect the fuel tank pressure sensor electrical connector.
4. Remove the fuel tank pressure sensor by carefully prying the sensor out of the fuel tank with a screwdriver.

1. Lubricate the fuel tank pressure sensor rubber grommet with clean engine oil in order to aid in installation.
2. Install the fuel tank pressure sensor into the top of the fuel tank.
3. Connect the fuel tank pressure sensor electrical connector.
4. Install the EVAP canister access cover.
5. Install the right rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.

1. Remove the fuel filler cap.
2. Remove the left rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
3. Disconnect the fuel fill hose (1) and the vent hose (2) from the fuel tank fill and vent pipe.
4. Cap the open ends of the fuel fill hose (1) and the vent hose (2).
5. Disconnect the fuel system ground strap.
6. Remove the fuel tank fill and vent pipe from the fuel filler pocket.

1. Install the fuel tank fill and vent pipe to the fuel filler pocket. Tighten: Tighten the fuel tank fill and vent pipe bolts to 3.5 N.m (31 lb in).
2. Connect the fuel fill pipe ground strap. Tighten: Tighten the fuel fill pipe ground strap bolt to 4.0 N.m (35 lb in).
3. Uncap the openings on the fuel fill hose (1) and the vent hose (2).
4. Connect the fuel fill hose (1) and the vent hose (2) to the fuel tank fill and vent pipe. Tighten: Tighten the fuel fill hose clamp to 3.5 N.m (31 lb in).
5. Install the left rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
6. Install the fuel filler cap.

1. Remove the left fuel tank. Refer to «Fuel Tank Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
2. Remove the fuel fill hose (1) from the fuel tank.
3. Cap the open end of the fuel tank.

1. Uncap the opening on the fuel tank.
2. Install the fuel fill hose (1) to the fuel tank. Tighten: Tighten the fuel fill hose clamp to 3.5 N.m (31 lb in).
3. Install the left fuel tank. Refer to «Fuel Tank Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

J39765-A Fuel Sender Lock Ring Tool

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the left fuel tank. Refer to «Fuel Tank Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Place the fuel tank on a suitable work surface.
4. Disconnect the fuel pump jumper harness from the fuel pump module.
5. Disconnect the jet line insert connector from the crossover tube to the fuel tank opening.
6. Disconnect the fuel feed line from the welded clip on the side of the fuel tank.
7. Using the J39765-A , remove the fuel pump module locking ring.
8. Carefully remove the fuel pump module from the fuel tank, with the jet lines connected. Ensure not to damage the fuel sender float arm.
9. Disconnect the jet line quick-connect connectors from the fuel pump module inner port.
10. Remove the jet line from the module retainer cup. This line has no attached connector.
11. Remove the fuel pump module O-ring from the fuel tank opening.
12. Remove the jet line insert through the crossover tube to fuel tank opening.

1. Inspect the jet line insert for damage and replace if necessary.
2. Install the jet line insert through the crossover tube to the fuel tank opening.
3. Install a new fuel pump module O-ring to the fuel tank opening.
4. Place tape around the jet line with the connector. This will permit line access once the pump module is inserted into the fuel tank.
5. Install the pump module into the fuel tank half way, ensuring not to damage the float arm.
6. Using the tape as a guide, gently pull the jet line up through the fuel pump module opening.
7. Place the jet line with no connector in the module retainer cup.
8. Secure the line into the module retaining clip.
9. Remove the tape from the jet line with a connector.
10. Connect the jet line quick-connect connectors to the fuel pump module inner port.
11. Compress and align the fuel pump module into the fuel tank, while ensuring not to damage the float arm.
12. Install the fuel pump module lock ring.
13. Using the J39765-A , fully lock the fuel pump module lock ring in place.
14. Connect the fuel supply line into the weld clip on the side of the fuel tank.
15. Using a DMM, verify the full and empty readings resistance reading of the fuel pump module. Turn the fuel tank upside down to achieve the full tank reading. Resistance: Empty tank reading 40 ohms resistance Full tank reading 250 ohms resistance
16. Connect the jet line insert connector into the crossover tube to fuel tank opening.
17. Connect the fuel pump jumper harness to the fuel pump module.
18. Install the left fuel tank. Refer to «Fuel Tank Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

J39765-A Fuel Sender Lock Ring Tool

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the right fuel tank. Refer to «Fuel Tank Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Place the fuel tank on a suitable work surface.
4. Disconnect the evaporative emissions (EVAP) purge line (4) from the fuel pump module.
5. Disconnect the fuel pump module harness connector (5).
6. Disconnect the fuel tank pressure (FTP) sensor harness connector (1).
7. If replacing the fuel pump module, remove the FTP sensor (2). Refer to «Fuel Tank Pressure Sensor Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
8. Disconnect the jet line insert connector from the crossover tube to the fuel tank opening.
9. Using the J39765-A , remove the fuel pump module locking ring.
10. Carefully remove the fuel pump module from the fuel tank, with the jet lines connected. Ensure not to damage the fuel sender float arm.
11. Disconnect the jet line quick-connect connectors from the fuel pump module, noting the location of the lines for installation.
12. Remove the fuel pump module O-ring from the fuel tank opening.
13. Remove the jet line insert through the crossover tube to the fuel tank opening.

1. Inspect the jet line insert for damage and replace if necessary.
2. Install the jet line insert through the crossover tube to the fuel tank opening.
3. Install a new fuel pump module O-ring to the fuel tank opening.
4. Pull the jet line quick-connectors up through the pump module opening, connecting the lines to the pump module as previously noted.
5. Install the pump module into the fuel tank, ensuring not to damage the float arm.
6. Compress and align the fuel pump module while installing the lock ring.
7. Using the J39765-A , fully lock the fuel pump module lock ring in place.
8. Using a DMM, verify the full and empty readings resistance reading of the fuel pump module. Turn the fuel tank upside down to achieve the full tank reading. Resistance: Empty 40 ohms resistance Full 250 ohms resistance
9. Connect the jet line insert connector into the crossover tube to fuel tank opening.
10. If replacing the fuel pump module, install the FTP sensor (2). Refer to «Fuel Tank Pressure Sensor Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
11. Connect the FTP sensor harness connector (1).
12. Connect the fuel pump module harness connector (5).
13. Connect the EVAP purge line (4) from the fuel pump module.
14. Install the right fuel tank. Refer to «Fuel Tank Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

J39765-A Fuel Sender Lock Ring Tool

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the left fuel tank. Refer to «Fuel Tank Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Place the fuel tank on a suitable work surface.
4. Disconnect the fuel pump jumper harness from the fuel pump module.
5. Disconnect the jet line insert connector from the crossover tube to fuel tank opening.
6. Disconnect the fuel feed line from the welded clip on the side of the fuel tank.
7. Using the J39765-A , remove the fuel pump module locking ring.
8. Carefully remove the fuel pump module from the fuel tank, with the jet lines connected. Take care not to damage the fuel sender float arm.
9. Disconnect the jet line quick-connect connectors from the fuel pump module inner port.
10. Remove the jet line from the module retainer cup. This line has no attached connector.
11. Remove the fuel pump module O-ring from the fuel tank opening.
12. Remove the jet line insert through the crossover tube to fuel tank opening.

1. Inspect the jet line insert for damage and replace if necessary.
2. Install the jet line insert through the crossover tube to fuel tank opening.
3. Install a new fuel pump module O-ring to the fuel tank opening.
4. Place tape around the jet line with the connector. This will permit line access once the pump module is inserted into the fuel tank.
5. Install the pump module into the fuel tank half way, taking care not to damage the float arm.
6. Using the tape as a guide, gently pull the jet line up through the fuel pump module opening.
7. Place the jet line with no connector in the module retainer cup.
8. Secure the line into the module retaining clip.
9. Remove the tape from the jet line with a connector.
10. Connect the jet line quick-connect connectors to the fuel pump module inner port.
11. Compress and align the fuel pump module into the fuel tank, while taking care not to damage the float arm.
12. Install the fuel pump module lock ring.
13. Using the J39765-A , fully lock the fuel pump module lock ring in place.
14. Connect the fuel supply line into the weld clip on the side of the fuel tank.
15. Using a DMM, verify the full and empty readings resistance reading of the fuel pump module. Turn the fuel tank upside down to achieve the full tank reading. Resistance: Empty tank reading 40 ohms resistance Full tank reading 250 ohms resistance
16. Connect the jet line insert connector into the crossover tube to fuel tank opening.
17. Connect the fuel pump jumper harness to the fuel pump module.
18. Install the left fuel tank. Refer to «Fuel Tank Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

J39765-A Fuel Sender Lock Ring Tool

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the right fuel tank. Refer to «Fuel Tank Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Place the fuel tank on a suitable work surface.
4. Disconnect the EVAP purge line (4) from the fuel pump module.
5. Disconnect the fuel pump module harness connector (5).
6. Disconnect the FTP sensor harness connector (1).
7. If replacing the fuel pump module, remove the FTP sensor (2).
8. Disconnect the jet line insert connector from the crossover tube to fuel tank opening.
9. Using the J39765-A , remove the fuel pump module locking ring.
10. Carefully remove the fuel pump module from the fuel tank, with the jet lines connected. Take care not to damage the fuel sender float arm.
11. Disconnect the jet line quick-connect connectors from the fuel pump module, noting the location of the lines for installation.
12. Remove the fuel pump module O-ring from the fuel tank opening.
13. Remove the jet line insert through the crossover tube to fuel tank opening.

1. Inspect the jet line insert for damage and replace if necessary.
2. Install the jet line insert through the crossover tube to fuel tank opening.
3. Install a new fuel pump module O-ring to the fuel tank opening.
4. Pull the jet line quick-connectors up through the pump module opening, connecting the lines to the pump module as previously noted.
5. Install the pump module into the fuel tank, taking care not to damage the float arm.
6. Compress and align the fuel pump module, while installing the lock ring.
7. Using the J39765-A , fully lock the fuel pump module lock ring in place.
8. Using a DMM, verify the full and empty readings resistance reading of the fuel pump module. Turn the fuel tank upside down to achieve the full tank reading. Resistance: Empty 40 ohms resistance Full 250 ohms resistance
9. Connect the jet line insert connector into the crossover tube to fuel tank opening.
10. If replacing the fuel pump module, install the FTP sensor (2).
11. Connect the FTP sensor harness connector (1).
12. Connect the fuel pump module harness connector (5).
13. Connect the EVAP purge line (4) from the fuel pump module.
14. Install the right fuel tank. Refer to «Fuel Tank Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

Fuel Hose/Pipes Replacement - Chassis

Tools Required

1. J 34730-1A Fuel Pressure Gage
2. J 37088-A Fuel Line Disconnect Tool Set

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
3. Relieve the fuel system pressure. Refer to the «Fuel Pressure Relief»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
4. Disconnect the fuel feed hose (2) from the chassis fuel feed pipe (3). Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__metal-collar-quick-connect-fitting-service) .
5. Cap the engine compartment fuel feed pipe.
6. Disconnect the chassis fuel and EVAP pipe retainer (1) from the upper front of dash mounting stud (3).
7. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
8. Remove the exhaust intermediate pipe. Refer to «Intermediate Pipe Replacement»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
9. Remove the driveline tunnel closeout panel. Refer to «Driveline Tunnel Closeout Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) .
10. Disconnect the chassis fuel pipe (5) from the underbody retainers (6).
11. Remove the chassis fuel pipe.

1. Install the chassis fuel pipe (5) into the underbody retainers (6).
2. Connect the chassis fuel feed pipe.
3. Install the driveline tunnel closeout panel. Refer to «Driveline Tunnel Closeout Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) .
4. Install the exhaust intermediate pipe. Refer to «Intermediate Pipe Replacement»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
5. Lower the vehicle.
6. Remove the cap from the engine compartment fuel feed pipe.
7. Connect the chassis fuel and EVAP pipe retainer (1) at the upper front of dash mounting stud (3). Tighten: Tighten the fuel and EVAP pipe retainer nut to 6 N.m (53 lb in).
8. Connect the fuel feed hose (2) to the chassis fuel feed pipe (3). Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__metal-collar-quick-connect-fitting-service) .
9. Tighten the fuel filler cap.
10. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
11. Perform the following procedure in order to inspect for leaks: Turn the ignition switch ON for 2 seconds. Turn the ignition switch OFF for 10 seconds. Turn the ignition switch ON. Inspect for fuel leaks.
12. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
13. Program the transmitters. Refer to «Transmitter Programming (Domestic and Japan)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-domestic-and-japan) or «Transmitter Programming (Export - Including Canada)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-export-including-canada) .

Fuel Hose/Pipes Replacement - Engine Compartment

Tools Required

1. J 34730-1A Fuel Pressure Gage
2. J 37088-A Fuel Line Disconnect Tool Set

1. Disconnect the negative battery cable.
2. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
3. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
4. Disconnect the quick-connect fitting at the fuel rail (1). Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__metal-collar-quick-connect-fitting-service) .
5. Disconnect the quick-connect fitting at the chassis fuel pipe (3). Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__metal-collar-quick-connect-fitting-service) .
6. Remove the fuel feed hose (2).
7. Cap the chassis fuel pipe and the fuel rail pipe in order to prevent possible fuel system contamination.
8. Inspect the hose for bends, for kinks, for chafing, and for cracks. Replace the hose as required.

1. Remove the caps from the chassis fuel pipe and the fuel rail pipe.
2. Connect the fuel feed hose (2) to the chassis fuel pipe (3). Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__metal-collar-quick-connect-fitting-service) .
3. Connect the fuel feed hose (2) to the fuel rail (1). Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__metal-collar-quick-connect-fitting-service) .
4. Tighten the fuel filler cap.
5. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
6. Perform the following procedure in order to inspect for leaks: Turn the ignition switch ON for 2 seconds. Turn the ignition switch OFF for 10 seconds. Turn the ignition switch ON. Inspect for fuel leaks.
7. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
8. Program the transmitters. Refer to «Transmitter Programming (Domestic and Japan)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-domestic-and-japan) or «Transmitter Programming (Export - Including Canada)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-export-including-canada) .

Fuel System Cleaning

Tools Required

1. J 34730-1A Fuel Pressure Gage
2. J 37088-A Fuel Line Disconnect Tool Set

1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Drain the fuel tanks. Refer to «Fuel Tank Draining»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
4. Remove the fuel tanks.
5. Remove the fuel tank modules. Refer to «Fuel Tank Fuel Pump Module Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) and «Fuel Tank Fuel Pump Module Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
6. Inspect the left fuel. Replace a contaminated strainer for the left fuel sender only, and inspect the fuel pump.
7. Inspect the left fuel sender fuel pump inlet for debris. Replace the left fuel sender assembly if you find debris in the fuel pump inlet.
8. Inspect the right fuel sender strainers. Replace the right fuel sender assembly if you find a contaminated strainer. The right fuel sender strainers are not serviced separately.
9. Flush the fuel tanks with hot water.
10. Pour the water out of the fuel sender assembly openings. Rock the tanks to be sure that removal of the water from the tanks is complete.
11. Install the fuel sender assemblies.
12. Install the fuel tanks.
13. Refill the fuel system.
14. Install the fuel filler cap.
15. Connect the negative battery cable.
16. Perform the following procedure in order to inspect for leaks: Turn the ignition switch ON for 2 seconds. Turn the ignition switch OFF for 10 seconds. Turn the ignition switch ON. Inspect for fuel leaks.
17. Program the transmitters. Refer to «Transmitter Programming (Domestic and Japan)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-domestic-and-japan) or «Transmitter Programming (Export - Including Canada)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-export-including-canada) .

Note. Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components. Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
3. Relieve the fuel system pressure. Refer to the «Fuel Pressure Relief»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
4. Clean the fuel rail assembly with a spray type engine cleaner, GM X 30A or equivalent, if necessary. Follow the package instructions. Do not soak the fuel rail in liquid cleaning solvent.
5. Disconnect the fuel feed and return pipes (2, 3) from the fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__metal-collar-quick-connect-fitting-service) .
6. Disconnect the positive crankcase ventilation (PCV) air tube from the cam cover.
7. Disconnect the fuel injector electrical connectors (1) from each fuel injector (2).
8. Remove the engine wiring harness from the fuel rail stud.
9. Remove the engine wiring harness from the clips.
10. Lay the harness aside.
11. Remove the fuel rail attaching studs.
12. Remove the fuel rail.
13. Remove the injector lower O-ring seal from the spray tip end of each injector.
14. Discard the O-ring seals.
15. If replacing the fuel rail, remove the fuel injectors. Refer to «Fuel Injector Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

Note. Use care when servicing the fuel system components, especially the fuel injector electrical connectors, the fuel injector tips, and the injector O-rings. Plug the inlet and the outlet ports of the fuel rail in order to prevent contamination. Do not use compressed air to clean the fuel rail assembly as this may damage the fuel rail components. Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.

1. Lubricate the new lower injector O-ring seals with clean engine oil.
2. If replacing the fuel rail, install the fuel injectors. Refer to «Fuel Injector Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Install the new O-ring seals on the spray tip end of each injector.
4. Install the fuel rail.
5. Install the fuel rail attaching studs (2). Tighten: Tighten the studs to 9 N.m (80 lb in).
6. Position the harness to the engine.
7. Install the engine wiring harness to the clips.
8. Install the engine wiring harness to the fuel rail stud.
9. Connect the fuel injector electrical connectors (1) to each fuel injector (2).
10. Connect the fuel feed and return pipes (2, 3) to the fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__metal-collar-quick-connect-fitting-service) .
11. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
12. Inspect for fuel leaks using the following procedures: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
13. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

1. Remove the fuel rail. Refer to «Fuel Injection Fuel Rail Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
2. Remove the fuel injector by pushing the locking tab on the fuel rail toward the center of the fuel rail.
3. Remove the fuel injector upper O-ring.
4. Remove the fuel injector lower O-ring.
5. Discard the injector O-ring seals.

1. Lubricate the new upper and lower O-rings with clean engine oil.
2. Install the new upper and lower injector O-rings on the fuel injector.
3. Install the fuel injector on to the fuel rail.
4. Install the fuel rail. Refer to «Fuel Injection Fuel Rail Assembly Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the engine vacuum pipe from the EVAP canister purge solenoid valve to intake manifold EVAP pipe.
3. Disconnect the engine purge pipe from the EVAP canister purge valve (2).
4. Disconnect the EVAP canister purge valve harness connector (1).
5. Remove the EVAP canister purge valve.

1. Install the EVAP canister purge valve.
2. Connect the harness connector (1) to the EVAP canister purge valve.
3. Connect the engine purge pipe (2) to the chassis purge pipe.
4. Connect the engine vacuum pipe to the EVAP canister purge valve.
5. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Lower the right muffler for automatic transmission equipped vehicles only. Refer to «Exhaust Muffler Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
3. Disconnect the EVAP canister valve harness connector.
4. Disconnect the vent hose (2) from the EVAP canister vent valve (1).
5. Remove the EVAP canister vent valve (2) from the vent bracket (1).

1. Install the EVAP canister vent valve (2) to the vent bracket (1).
2. Connect the vent hose (2) to the EVAP canister vent valve (1).
3. Connect the EVAP vent valve electrical connector.
4. For automatic transmission- equipped vehicles only, raise the right muffler. Refer to «Exhaust Muffler Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
5. Lower the vehicle.

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. For vehicles equipped with automatic transmission, remove the right muffler. Refer to «Exhaust Muffler Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) in Engine Exhaust.
3. Disconnect the vent hose (2) from the EVAP vent valve (1).
4. Remove the clamp from the vent hose.
5. Remove the right rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
6. Remove the EVAP canister access cover.
7. Disconnect the vent hose from the EVAP canister.
8. Remove the vent hose.
9. Cap the EVAP vent valve and the EVAP canister in order to prevent possible EVAP system contamination.

1. Remove the caps from the EVAP vent valve and the EVAP canister.
2. Route the vent hose over the floor panel tunnel panel rear brace.
3. Install the clamps on the vent hose.
4. Connect the vent hose to the EVAP canister.
5. Connect the vent hose (2) to the EVAP vent valve.
6. For vehicles equipped with automatic transmission, install the right muffler. Refer to «Exhaust Muffler Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) in Engine Exhaust.
7. Install the EVAP canister access cover.
8. Install the right rear wheelhouse liner panel. Refer to «Rear Wheelhouse Liner Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
9. Lower the vehicle.

1. Disconnect the engine purge pipe (1) from the chassis purge pipe (2).
2. Cap the engine purge pipe in order to prevent possible contamination.
3. Disconnect the chassis fuel and EVAP pipe retainer (1) from the upper front of dash mounting stud (3).
4. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/xlr/i-2003-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
5. Remove the exhaust intermediate pipe. Refer to «Intermediate Pipe Replacement»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
6. Remove the driveline tunnel closeout panel. Refer to «Driveline Tunnel Closeout Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) .
7. Remove the EVAP canister vent valve (2) from the bracket (1).
8. Disconnect the rear purge pipe (1) at the chassis purge pipe (3).
9. Cap the rear purge pipe.
10. Remove the chassis purge pipe (4) rear underbody retainer nuts (3).
11. Remove the chassis purge pipe (4) from the rear underbody retainers (2).
12. Disconnect the chassis purge pipe (4) from the side underbody retainers (6).
13. Remove the chassis purge pipe.

1. Install the chassis purge pipe (4) into the side underbody retainer (6).
2. Install the chassis purge pipe (4) into the rear underbody retainers (2).
3. Install the underbody retainers on the mounting studs.
4. Install the chassis purge pipe underbody retainer nuts. Tighten: Tighten the EVAP pipe retainer bracket nuts to 6 N.m (53 lb in).
5. Uncap the rear EVAP pipe.
6. Connect the rear EVAP pipe (1) to the chassis purge pipe (3).
7. Install the EVAP canister vent valve (2) to the bracket (1).
8. Install the driveline tunnel closeout panel. Refer to «Driveline Tunnel Closeout Panel Replacement»(/cadillac/xlr/i-2003-2009/remont/driveshaft-universal-joints/#propeller-shaft) .
9. Install the exhaust intermediate pipe. Refer to «Intermediate Pipe Replacement»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
10. Lower the vehicle.
11. Uncap the engine purge pipe.
12. Connect the chassis fuel and EVAP pipe retainer at the upper front of dash mounting stud. Tighten: Tighten the fuel and EVAP pipe bracket retainer nut to 6 N.m (53 lb in).
13. Connect the engine purge pipe (1) to the chassis purge pipe (2).

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the quick-connect fittings at the intake manifold and the EVAP canister purge valve. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Remove the EVAP pipe.
4. Cap the intake manifold pipe and the EVAP canister purge valve in order to prevent possible contamination.

1. Remove the caps from the intake manifold pipe and the EVAP canister purge valve.
2. Install the EVAP pipe to the intake manifold and the EVAP canister purge valve.
3. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

J 34730-1A Fuel Pressure Gage

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Remove the fuel tank crossover tube. Refer to «Fuel Tank Crossover Tube/Hose Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
4. Disconnect the EVAP pipe (2) at the right tank EVAP pipe (3) and the left tank EVAP pipe (1).
5. Remove the rear EVAP pipe (2).
6. Cap the open pipes in order to prevent possible contamination.

1. Remove the caps from the pipes.
2. Connect the EVAP pipe (2) at the right tank EVAP pipe (3) and the left tank EVAP pipe (1).
3. Install the fuel tank crossover tube. Refer to «Fuel Tank Crossover Tube/Hose Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
4. Install the right and left muffler. Refer to «Exhaust Muffler Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) and «Exhaust Muffler Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/exhaust/#engine-exhaust-system) .
5. Refill the fuel system.
6. Tighten the fuel filler cap.
7. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/xlr/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
8. Use the following procedure in order to inspect for leaks: Turn the ignition switch ON, with the engine OFF for 2 seconds. Turn the ignition switch OFF, for 10 seconds. Turn the ignition switch ON, with the engine OFF. Inspect for fuel leaks.
9. Program the transmitters. Refer to «Transmitter Programming (Domestic and Japan)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-domestic-and-japan) or «Transmitter Programming (Export - Including Canada)»(/cadillac/xlr/i-2003-2009/remont/door-locks-anti-theft-systems/#keyless-entry-system__transmitter-programming-export-including-canada) .

1. Remove the right fuel tank. Refer to «Fuel Tank Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
2. Disconnect the vent hose from the EVAP canister.
3. Disconnect the purge pipe at the EVAP canister.
4. Remove the EVAP canister bracket bolt (3).
5. Remove the EVAP canister (1) from the EVAP canister bracket (2).

1. Install the new EVAP canister (1) to the EVAP canister bracket (2).
2. Install the EVAP canister bracket bolt (3). Tighten: Tighten the EVAP canister bracket bolt to 7 N.m (62 lb in).
3. Connect the purge pipe at the EVAP canister.
4. Connect the vent hose to the EVAP canister.
5. Install the right fuel tank. Refer to «Fuel Tank Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

Inspection Procedure

Tools Required

J 41413-200 Evaporative Emissions (EVAP) System Tester

Note. Refer to CLEAN, DRY, LOW PRESSURE GAS SOURCE NOTICE .

1. Turn OFF the ignition.
2. Remove the EVAP canister purge valve.
3. Lightly tap the EVAP canister purge valve on a clean hard surface.
4. Inspect for carbon particles exiting either of the vacuum ports. If no carbon particles are found, install the EVAP canister purge valve and continue with the EVAP cleaning procedure. If carbon particles are found during the inspection procedure, replace the EVAP canister purge valve and continue with the EVAP cleaning procedure. If you were instructed to replace the EVAP canister purge valve and no carbon particles are found, return to the EVAP diagnostic procedure. Do not perform the EVAP cleaning procedure.

EVAP Cleaning Procedure

1. Remove the EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
2. Turn OFF the main valve on J 41413-200 .
3. Disconnect the hose from the diagnostic station pressure regulator.
4. Using a section of vacuum hose, connect one end to the diagnostic station pressure regulator.
5. Connect the other end of the vacuum hose to the canister side of the purge pipe.
6. Turn on the main nitrogen cylinder valve and continue to discharge nitrogen for 15 seconds.
7. If the nitrogen does not dislodge the carbon particles, replace the purge pipe. Refer to «Evaporative Emission Hoses/Pipes Replacement - Engine/Chassis»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
8. Return the EVAP Pressure/Purge Diagnostic Station to its original condition.
9. Install a new EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
10. Lower the vehicle.
11. Continue with the published service manual diagnostic DTC procedure.

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the ignition coil wiring harness electrical connector from the coil that is being replaced.
3. Remove the ignition coil retaining bolt.
4. Remove the ignition coil.

1. Install the ignition coil.
2. Install the ignition coil retaining bolt. Tighten: Tighten the ignition coil retaining bolt to 10 N.m (89 lb in).
3. Connect the ignition coil electrical connector.
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the ignition coil wiring harness electrical connector from the coil that is being replaced.
3. Remove the ignition coil retaining bolt.
4. Remove the ignition coil.

1. Install the ignition coil.
2. Install the ignition coil retaining bolt. Tighten: Using the installation torque sequence, tighten the ignition module retaining bolts to 10 N.m (89 lb in).
3. Reconnect the ignition coil electrical connector.
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the ignition coil assembly electrical connector.
3. Remove the ignition coil assembly retaining bolts.
4. Carefully remove the ignition coil assembly.

1. Install the ignition coil assembly.
2. Install the ignition coil assembly retaining bolts. Tighten: Tighten the ignition coil assembly retaining bolts to 10 N.m (89 lb in).
3. Reconnect the ignition coil assembly electrical connector.
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the ignition coil assembly electrical connector.
3. Remove the ignition coil assembly retaining bolts.
4. Carefully remove the ignition coil assembly.

1. Carefully install the ignition coil assembly.
2. Install the ignition coil assembly retaining bolts. Tighten: Tighten the ignition coil assembly retaining bolts to 10 N.m (89 lb in).
3. Reconnect the ignition coil assembly electrical connector.
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

Spark Plug Inspection

Spark Plug Usage

1. Ensure that the correct spark plug is installed. An incorrect spark plug causes driveability conditions. Refer to «Ignition System Specifications»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__ignition-system-specifications) for the correct spark plug.
2. Ensure that the spark plug has the correct heat range. An incorrect heat range causes the following conditions: Spark plug fouling-Colder plug Pre-ignition causing spark plug and/or engine damage-Hotter plug

Spark Plug Inspection

1. Inspect the terminal post (1) for damage. Inspect for a bent or broken terminal post (1). Test for a loose terminal post (1) by twisting and pulling the post. The terminal post (1) should NOT move.
2. Inspect the insulator (2) for flashover or carbon tracking, soot. This is caused by the electrical charge traveling across the insulator (2) between the terminal post (1) and ground. Inspect for the following conditions: Inspect the spark plug boot for damage. Inspect the spark plug recess area of the cylinder head for moisture, such as oil, coolant, or water. A spark plug boot that is saturated causes arcing to ground.
3. Inspect the insulator (2) for cracks. All or part of the electrical charge may arc through the crack instead of the electrodes (3, 4).
4. Inspect (3) for evidence of improper arcing. Measure the gap between the center electrode (4) and the side electrode (3) terminals. Refer to «Ignition System Specifications»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__ignition-system-specifications) . An excessively wide electrode gap can prevent correct spark plug operation. Inspect for the correct spark plug torque. Refer to «Ignition System Specifications»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__ignition-system-specifications) . Insufficient torque can prevent correct spark plug operation. An over torqued spark plug, causes the insulator (2) to crack. Inspect for signs of tracking that occurred near the insulator tip instead of the center electrode (4). Inspect for a broken or worn side electrode (3). Inspect for a broken, worn, or loose center electrode (4) by shaking the spark plug. A rattling sound indicates internal damage. A loose center electrode (4) reduces the spark intensity. Inspect for bridged electrodes (3, 4). Deposits on the electrodes (3, 4) reduce or eliminates the gap. Inspect for worn or missing platinum pads on the electrodes (3, 4), if equipped. Inspect for excessive fouling.
5. Inspect the spark plug recess area of the cylinder head for debris. Dirty or damaged threads can cause the spark plug not to seat correctly during installation.

Spark Plug Visual Inspection

1. Normal operation-Brown to grayish-tan with small amounts of white powdery deposits are normal combustion by-products from fuels with additives.
2. Carbon fouled-Dry, fluffy black carbon, or soot caused by the following conditions: Rich fuel mixtures Leaking fuel injectors Excessive fuel pressure Restricted air filter element Incorrect combustion Reduced ignition system voltage output Weak coils Worn ignition wires Incorrect spark plug gap Excessive idling or slow speeds under light loads can keep spark plug temperatures so low that normal combustion deposits may not burn off.
3. Deposit fouling-Oil, coolant, or additives that include substances such as silicone, very white coating, reduces the spark intensity. Most powdery deposits will not effect spark intensity unless they form into a glazing over the electrode.

J 43094 Spark Plug Boot Puller. See Special Tools .

1. Turn OFF the ignition switch.
2. Remove the ignition coil assembly. Refer to «Ignition Coil Module Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) or «Ignition Coil Module Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
3. Use the J 43094 in order to remove the spark plug boots from the spark plugs. See «Special Tools»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__special-tools) .
4. Remove the spark plugs from the engine.
5. Inspect the spark plugs. Refer to «Spark Plug Inspection»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-44l-introduction-2-of-2__spark-plug-inspection) .

1. Measure the spark plug gap on the spark plugs to be installed. Compare the measurement to the gap specifications. Refer to «Ignition System Specifications»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2__ignition-system-specifications) , correct as necessary.
2. Install the spark plugs to the engine. Tighten: Tighten the spark plugs to 15 N.m (11 lb ft).
3. Install the spark plug boots to the ignition coil assembly.
4. Refer to «Ignition Coil Module Replacement - Left Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) or «Ignition Coil Module Replacement - Right Side»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .

1. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the crankshaft position sensor electrical connector.
3. Remove the crankshaft sensor retaining bolt.
4. Remove the crankshaft sensor.

1. Lubricate the crankshaft sensor O-ring with clean engine oil.
2. Install the crankshaft sensor and the retaining bolt. Tighten: Tighten the retaining bolt between 10 N.m (89 lb in).
3. Connect the crankshaft position sensor electrical connector.
4. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
5. Operate the engine and inspect crankshaft sensor for engine oil leaks.
6. Perform the «Crankshaft Position System Variation Learn»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-44l-introduction-2-of-2__crankshaft-position-system-variation-learn) .

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the electrical connector from the left bank exhaust camshaft position sensor (2).
3. Remove the camshaft sensor retaining bolt.
4. Remove the left bank exhaust camshaft sensor (4).

1. Lubricate the camshaft sensor O-ring with engine oil.
2. Install the left bank exhaust camshaft position sensor (4) and retaining bolt. Tighten: Tighten the retaining bolt to 10 N.m (89 lb in).
3. Reconnect the camshaft sensor electrical connector (2).
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
5. Operate the engine and inspect the camshaft sensor for engine oil leaks.

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the electrical connector from the left bank intake camshaft position sensor (1).
3. Remove the camshaft sensor retaining bolt.
4. Remove the left bank intake camshaft sensor (3).

1. Lubricate the camshaft sensor O-ring with engine oil.
2. Install the left bank intake camshaft position sensor (3) and retaining bolt. Tighten: Tighten the retaining bolt to 10 N.m (89 lb in).
3. Reconnect the camshaft sensor electrical connector (1).
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
5. Operate the engine and inspect the camshaft sensor for engine oil leaks.

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the electrical connector from the right bank exhaust camshaft position sensor (2).
3. Remove the camshaft sensor retaining bolt.
4. Remove the right bank exhaust camshaft sensor (1).

1. Lubricate the camshaft sensor O-ring with engine oil.
2. Install the right bank exhaust camshaft position sensor (1) and retaining bolt. Tighten: Tighten the retaining bolt to 10 N.m (89 lb in).
3. Reconnect the camshaft sensor electrical connector (2).
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
5. Operate the engine and inspect the camshaft sensor for engine oil leaks.

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the electrical connector from the right bank intake camshaft position sensor (1).
3. Remove the camshaft sensor retaining bolt.
4. Remove the right bank intake camshaft sensor (2).

1. Lubricate the camshaft sensor O-ring with engine oil.
2. Install the right bank intake camshaft position sensor (2) and retaining bolt. Tighten: Tighten the retaining bolt to 10 N.m (89 lb in).
3. Reconnect the camshaft sensor electrical connector (1).
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
5. Operate the engine and inspect the camshaft sensor for engine oil leaks.

1. Remove the power steering reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement»(/cadillac/xlr/i-2003-2009/remont/manual-power-steering/#power-steering-system) .
2. Disconnect the actuator solenoid electrical connector.
3. Remove the right intake camshaft position (CMP) actuator solenoid bolts.
4. Remove the right intake CMP actuator solenoid.

Camshaft Position Actuator Solenoid Alignment

1. Make an alignment pin from drill rod 15/64 inch diameter and at least 50 mm (1.97 in) long.
2. Verify that the alignment pin will pass through the CMP actuator solenoid alignment hole.
3. Verify that the alignment pin will fit into the alignment hole in the CMP actuator oil control valve.
4. Apply a 2 mm (0.079 in) bead of room temperature vulcanizing (RTV) sealer GM P/N 12378521 (Canadian P/N 88901148) around the flange of the CMP actuator solenoid.
5. Install the CMP actuator solenoid over the oil control valve.
6. Install the alignment pin through the solenoid alignment hole and into the oil control valve alignment hole.
7. With the alignment pin in place, install the CMP actuator solenoid bolts. Tighten: Tighten the CMP actuator solenoid bolts to 8 N.m (71 lb in).
8. Remove the alignment pin.
9. Install a NEW CMP actuator solenoid plug.
10. Connect the electrical connector to the actuator solenoid.
11. Install the power steering reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement»(/cadillac/xlr/i-2003-2009/remont/manual-power-steering/#power-steering-system) .

1. Remove the power steering reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement»(/cadillac/xlr/i-2003-2009/remont/manual-power-steering/#power-steering-system) .
2. Disconnect the actuator solenoid electrical connector.
3. Remove the right exhaust camshaft position (CMP) actuator solenoid bolts.
4. Remove the right exhaust CMP actuator solenoid.

Camshaft Position Actuator Solenoid Alignment

1. Make an alignment pin from drill rod 15/64 inch diameter and at least 50 mm (1.97 in) long.
2. Verify that the alignment pin will pass through the CMP actuator solenoid alignment hole.
3. Verify that the alignment pin will fit into the alignment hole in the CMP actuator oil control valve.
4. Apply a 2 mm (0.079 in) bead of room temperature vulcanizing (RTV) sealer GM P/N 12378521 (Canadian P/N 88901148) around the flange of the CMP actuator solenoid.
5. Install the CMP actuator solenoid over the oil control valve.
6. Install the alignment pin through the solenoid alignment hole and into the oil control valve alignment hole.
7. With the alignment pin in place, install the CMP actuator solenoid bolts. Tighten: Tighten the CMP actuator solenoid bolts to 8 N.m (71 lb in).
8. Remove the alignment pin.
9. Install a NEW CMP actuator solenoid plug.
10. Connect the electrical connector to the actuator solenoid.
11. Install the power steering reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement»(/cadillac/xlr/i-2003-2009/remont/manual-power-steering/#power-steering-system) .

1. Disconnect the actuator solenoid electrical connector.
2. Remove the left intake camshaft position (CMP) actuator solenoid bolts.
3. Remove the left intake CMP actuator solenoid.

Camshaft Position Actuator Solenoid Alignment

1. Make an alignment pin from drill rod 15/64 inch diameter and at least 50 mm (1.97 in) long.
2. Verify that the alignment pin will pass through the CMP actuator solenoid alignment hole.
3. Verify that the alignment pin will fit into the alignment hole in the CMP actuator oil control valve.
4. Apply a 2 mm (0.079 in) bead of RTV GM P/N 12378521 (Canadian P/N 88901148) around the flange of the CMP actuator solenoid.
5. Install the CMP actuator solenoid over the oil control valve.
6. Install the alignment pin through the solenoid alignment hole and into the oil control valve alignment hole.
7. With the alignment pin in place, install the CMP actuator solenoid bolts. Tighten: Tighten the CMP actuator solenoid bolts to 8 N.m (71 lb in).
8. Remove the alignment pin.
9. Install a NEW CMP actuator solenoid plug.
10. Connect the electrical connector to the actuator solenoid.

1. Remove the drive belt tensioner. Refer to «Drive Belt Tensioner Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the actuator solenoid electrical connector.
3. Remove the left exhaust camshaft position (CMP) actuator solenoid bolts.
4. Remove the left exhaust CMP actuator solenoid.

Camshaft Position Actuator Solenoid Alignment

1. Make an alignment pin from drill rod 15/64 inch diameter and at least 50 mm (1.97 in) long.
2. Verify that the alignment pin will pass through the CMP actuator solenoid alignment hole.
3. Verify that the alignment pin will fit into the alignment hole in the CMP actuator oil control valve.
4. Apply a 2 mm (0.079 in) bead of RTV GM P/N 12378521 (Canadian P/N 88901148) around the flange of the CMP actuator solenoid.
5. Install the CMP actuator solenoid over the oil control valve.
6. Install the alignment pin through the solenoid alignment hole and into the oil control valve alignment hole.
7. With the alignment pin in place, install the CMP actuator solenoid bolts. Tighten: Tighten the CMP actuator solenoid bolts to 8 N.m (71 lb in).
8. Remove the alignment pin.
9. Install a NEW CMP actuator solenoid plug.
10. Connect the electrical connector to the actuator solenoid.
11. Install the drive belt tensioner. Refer to «Drive Belt Tensioner Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

1. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the electrical connector (3) from the knock sensor (KS) (4).
3. Remove the bolt in the center of the KS.
4. Remove the KS (4) from the engine block.

1. Thoroughly clean the mating surfaces of the KS and the engine block. The entire contact surface of the KS must lie directly on the engine block.
2. Install the KS (1) and the bolt to the engine block. Tighten: Tighten the KS bolt to 20 N.m (15 lb ft).
3. Ensure that the wiring harness is installed correctly.
4. Connect the electrical connector (3) to the KS (4).
5. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

1. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .
2. Disconnect the electrical connector (2) from the knock sensor (KS) (1).
3. Remove the bolt in the center of the KS.
4. Remove the KS (1) from the engine block.

1. Thoroughly clean the mating surfaces of the KS and the engine block. The entire contact surface of the KS must lie directly on the engine block.
2. Install the KS (1) and the bolt to the engine block. Tighten: Tighten the KS bolt to 20 N.m (15 lb ft).
3. Ensure that the wiring harness is installed correctly.
4. Connect the electrical connector (2) to the KS (1).
5. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/xlr/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) .

1. Release the retainer latches.
2. Release the air cleaner housing cover.
3. Remove the air filter element.

1. Install the air filter element into the air cleaner housing.
2. Secure the air cleaner housing cover.
3. Secure the retainer latches.

J 22610 Service Boot Clamp Installer. See Special Tools .

1. Disconnect the positive crankcase ventilation (PCV) fresh air hose from the resonator duct.
2. Loosen the air intake duct to the throttle body clamp (1).
3. Remove the air intake duct (1) from the throttle body (2).
4. Partially raise the air cleaner assembly.
5. Disconnect the electrical connector from the mass air flow (MAF) sensor.
6. Remove the air cleaner assembly.

1. Install the MAF/intake air temperature (IAT) sensor to the air cleaner assembly, if necessary.
2. Locate the 4 air cleaner duct alignment studs.
3. Connect the MAF sensor connector before securing the air cleaner assembly grommets to alignment studs.
4. Position the air intake duct (1) to the throttle body (2).
5. Tighten the air intake duct clamp at the throttle body.
6. Use a GM approved non-silicone lubricant in order to help with installation.
7. Connect the PCV fresh air hose to the resonator duct.
8. Connect the MAF/IAT sensor electrical connector.

1. Remove the air cleaner. Refer to «Air Cleaner Element Replacement»(/cadillac/xlr/i-2003-2009/remont/testing-diagnostics/#engine-controls-46l-lh2-introduction-2-of-2) .
2. Loosen the air duct clamp at the rear of the mass air flow sensor.
3. Remove the air duct (1).

1. Install the air duct (1).
2. Install the air duct to the throttle body. Tighten: Tighten the clamp assembly to 3 N.m (27 lb in).
3. Install the air cleaner.

Engine Control Module Description

The engine control module (ECM) interacts with many emission related components and systems, and monitors the emission related components and systems for deterioration. OBD II diagnostics monitor the system performance and a diagnostic trouble code (DTC) sets if the system performance degrades.

The malfunction indicator lamp (MIL) operation and the DTC storage are dictated by the DTC type. A DTC is ranked as a Type A or Type B if the DTC is emissions related. Type C is a non-emissions related DTC.

The ECM is in the engine compartment. The ECM is the control center of the engine controls system. The ECM controls the following components

1. The fuel injection system
2. The ignition system
3. The emission control systems
4. The on-board diagnostics
5. The A/C and fan systems
6. The throttle actuation control (TAC) system

The ECM constantly monitors the information from various sensors and other inputs, and controls the systems that affect the vehicle performance and the emissions. The ECM also performs diagnostic tests on various parts of the system. The ECM can recognize operational problems and alert the driver via the MIL. When the ECM detects a malfunction, the ECM stores a DTC. The condition area is identified by the particular DTC that is set. This aids the technician in making repairs.

ECM Function

The engine control module (ECM) can supply 5 volts or 12 volts to the various sensors or switches. This is done through pull-up resistors to the regulated power supplies within the ECM. In some cases, even an ordinary shop voltmeter will not give an accurate reading because the resistance is too low. Therefore, a DMM with at least 10 megohms input impedance is required in order to ensure accurate voltage readings.

The ECM controls the output circuits by controlling the ground or the power feed circuit through the transistors or a device called an output driver module.

EEPROM

The electronically erasable programmable read only memory (EEPROM) is a permanent memory that is physically part of the engine control module (ECM). The EEPROM contains program and calibration information that the ECM needs in order to control the powertrain operation.

Special equipment, as well as the correct program and calibration for the vehicle, are required in order to reprogram the ECM.

Data Link Connector (DLC)

The data link connector (DLC) is a 16-pin connector that provides the technician a means of accessing serial data for aid in the diagnosis. This connector allows the technician to use a scan tool in order to monitor the various serial data parameters, and display the DTC information. The DLC is located inside of the drivers compartment, underneath the dash.

Malfunction Indicator Lamp (MIL) Operation

The malfunction indicator lamp (MIL) is located in the instrument panel cluster. The MIL will display as either SERVICE ENGINE SOON or one of the following symbols when commanded ON

Scheme 47

Scheme 48

The MIL indicates that an emissions related fault has occurred and vehicle service is required.

The following is a list of the modes of operation for the MIL

1. The MIL illuminates when the ignition is turned ON, with the engine OFF. This is a bulb test to ensure the MIL is able to illuminate.
2. The MIL turns OFF after the engine is started if a diagnostic fault is not present.
3. The MIL remains illuminated after the engine is started if the control module detects a fault. A diagnostic trouble code (DTC) is stored any time the control module illuminates the MIL due to an emissions related fault. The MIL turns OFF after three consecutive ignition cycles in which a Test Passed has been reported for the diagnostic test that originally caused the MIL to illuminate.
4. The MIL flashes if the control module detects a misfire condition which could damage the catalytic converter.
5. When the MIL is illuminated and the engine stalls, the MIL will remain illuminated as long as the ignition is ON.
6. When the MIL is not illuminated and the engine stalls, the MIL will not illuminate until the ignition is cycled OFF and then ON.

ECM Service Precautions

The engine control module (ECM), by design, can withstand the normal current draws that are associated with the vehicle operations. However, care must be used in order to avoid overloading any of these circuits. When testing for opens or shorts, do not ground or apply voltage to any of the ECM circuits unless the diagnostic procedure instructs you to do so. These circuits should only be tested with a DMM.

Emissions Diagnosis For State I/M Programs

This OBD II equipped vehicle is designed to diagnose any conditions that could lead to excessive levels of the following emissions

1. Hydrocarbons (HC)
2. Carbon monoxide (CO)
3. Oxides of nitrogen (NOx)
4. Evaporative emission (EVAP) system losses

Should this vehicles on-board diagnostic system (ECM) detect a condition that could result in excessive emissions, the ECM turns ON the malfunction indicator lamp (MIL) and stores a DTC that is associated with the condition.

Aftermarket (Add-On) Electrical And Vacuum Equipment

Note. Do not attach add-on vacuum operated equipment to this vehicle. The use of add-on vacuum equipment may result in damage to vehicle components or systems.

Note. Connect any add-on electrically operated equipment to the vehicle's electrical system at the battery (power and ground) in order to prevent damage to the vehicle.

Aftermarket, add-on, electrical and vacuum equipment is defined as any equipment installed on a vehicle after leaving the factory that connects to the vehicles electrical or vacuum systems. No allowances have been made in the vehicle design for this type of equipment.

Add-on electrical equipment, even when installed to these strict guidelines, may still cause the powertrain system to malfunction. This may also include equipment not connected to the vehicle electrical system, such as portable telephones and radios. Therefore, the first step in diagnosing any powertrain condition is to eliminate all of the aftermarket electrical equipment from the vehicle. After this is done, if the problem still exists, the problem may be diagnosed in the normal manner.

Electrostatic Discharge (ESD) Damage

The electronic components that are used in the control systems are often designed to carry very low voltage. The electronic components are susceptible to damage caused by electrostatic discharge. Less than 100 volts of static electricity can cause damage to some electronic components.

There are several ways for a person to become statically charged. The most common methods of charging are by friction and by induction. An example of charging by friction is a person sliding across a car seat.

Charging by induction occurs when a person with well insulated shoes stands near a highly charged object and momentarily touches ground. Charges of the same polarity are drained off leaving the person highly charged with the opposite polarity. Static charges can cause damage, therefore, it is important to use care when handling and testing electronic components.

Emissions Control Information Label

The underhood Vehicle Emissions Control Information Label contains important emission specifications and setting procedures. In the upper left corner is the exhaust emission information. This identifies the year, the manufacturing division of the engine, the displacement of the engine in liters, the class of the vehicle, and type of fuel metering system. There is also an illustrated emission components and vacuum hose schematic.

This label is located in the engine compartment of every General Motors vehicle. If the label has been removed, it can be ordered from GM service parts operations (GMSPO).

Underhood Inspection

Perform a careful underhood inspection when performing any diagnostic procedure or diagnosing the cause of an emission test failure. This can often lead to repairing a condition without further steps. Use the following guidelines when performing an inspection

1. Inspect all of the vacuum hoses for correct routing, pinches, cuts, or disconnects.
2. Inspect any hoses that are difficult to see.
3. Inspect all of the wires in the engine compartment for the following conditions: Burned or chafed spots Pinched wires Contact with sharp edges Contact with hot exhaust manifolds

Throttle Actuator Control (TAC) System Description

The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions

1. Accelerator pedal position (APP) sensing
2. Throttle positioning to meet driver and engine demands
3. Throttle position sensing
4. Internal diagnostics
5. Cruise control functions
6. Manage TAC electrical power consumption

The TAC system components include the following

1. The APP sensors
2. The throttle body assembly
3. The engine control module (ECM)

Accelerator Pedal Position (APP) Sensor

The accelerator pedal position (APP) sensor is made up of 2 sensors that are housed inside one assembly. The engine control module (ECM) supplies a separate 5-volt reference and the low reference circuit for each of the sensors. The 5-volt reference for APP sensor 1 is supplied from the same source in the ECM as the 5-volt reference for the mass air flow (MAF) sensor and the fuel tank pressure (FTP) sensor. The 5-volt reference voltage for all of the sensors is supplied on separate ECM terminals, but the terminals are connected internally to a voltage supply. The APP sensor 1 sends a signal from the sensor to the ECM indicating the accelerator pedal position. The ECM actuates the throttle plates based on this information.

Throttle Position Sensors

The throttle position (TP) sensors 1 and 2 are located within the throttle body assembly. The TP sensors share a common 5-volt reference circuit and a common low reference circuit. The 5-volt reference circuit is also shared with accelerator pedal position (APP) sensor 2. The 5-volt reference voltage is supplied on 2 separate engine control module (ECM) terminals, but the terminals are connected internally to the same voltage supply. Each TP sensor has an individual signal circuit, which provides the ECM with a signal voltage proportional to throttle the plate movement. When the throttle plate is in the closed position, the TP sensor 1 signal voltage is near the low reference and increases as the throttle plate is opened. TP sensor 2 signal voltage at closed throttle is near the 5-volt reference and decreases as the throttle plate is opened.

Throttle Body Assembly

The throttle body assembly contains the following

1. Throttle blade
2. Throttle actuator motor
3. Throttle position (TP) sensor 1 and 2

The throttle body functions similar to a conventional throttle body with the following exceptions

1. An electric motor opens and closes the throttle valve.
2. The throttle blade is spring loaded in both directions and the default position is slightly open.
3. There are 2 individual TP sensors within the throttle body assembly.

The TP sensors are used to determine the throttle plate angle. The TP sensors provide the control module with signal voltage proportional to throttle plate movement. Both TP sensor signal voltages are low at closed throttle and increase as the throttle opens.

Engine Control Module

The engine control module (ECM) determines the driver's intent and then calculates the appropriate throttle response.

Camshaft Actuator System Description

The camshaft position (CMP) actuator system is used for a variety of engine performance enhancements. The CMP actuator system accomplishes this by controlling the amount of intake and exhaust valve overlap. These enhancements include the following

1. Lower emission output through exhaust gas recirculation (EGR) control
2. A wider engine torque range
3. Improved gas mileage
4. Improved engine idle stability

The CMP actuator system is comprised of the following components

1. Four CMP actuator solenoids
2. Four oil control valves
3. Four vane style CMP actuators
4. Four CMP sensors

The CMP actuator system requires a very complex electrical signal from the engine control module (ECM) in order to control the position of the CMP actuators. The electrical signal requires use of an un-fixed pulse width modulation (PWM) signal as well as 2 different operating frequencies of 150 and 500 Hz. Changes in the PWM can happen every 100 milliseconds and thus makes it difficult to measure the correct PWM or frequency with a DMM during CMP actuator control. At idle, the ECM commands a consistent 7 percent duty cycle at 150 Hz. The ECM uses this signal in order to sense certain circuit failures.

Scheme 49

The CMP actuator solenoids, or electromagnets, are located on the front of the engine and are mounted to their corresponding bank CMP actuator housing.

The oil control valves are threaded, and attach the CMP actuators to the front of the camshafts. The oil control valve meters the oil flow to the CMP actuator through the advancing and retarding oil ports. With no command fro the ECM, all of the oil is ported to the advancing chambers of the exhaust CMP actuators and to the retarding chambers of the intake CMP actuators. With full command from the ECM, all of the oil is ported to the retarding chambers of the exhaust CMP actuators and to the advancing chambers of the intake CMP actuators. When the intake or exhaust camshafts reach a desired position, above 0 degrees on the scan tool, the ECM will apply an electrical signal to the solenoids in order to hold the CMP actuators in the desired position. The oil control valves will port engine oil evenly to the advancing and retarding chambers of the CMP actuators in order to hold the camshafts in the desired position. The oil control valves will allow enough engine oil to flow to compensate for any leakage past the CMP actuators in order to hold the camshafts in a steady position.

The CMP actuators interface the timing chain to the camshafts, and are able to change the camshaft timing in relation to the crankshaft. The intake CMP actuators have the ability to move the intake camshafts a total of 40 degrees from the parked position. The exhaust CMP actuators have the ability to move the exhaust camshafts a total of 50 degrees from the parked position. With the engine OFF or with the CMP actuators not commanded, the exhaust CMP actuators are parked at the full advance position of 133 degrees ATDC and the intake CMP actuators are parked at the full retard position of 117 degrees before top dead center (BTDC). The CMP Angle parameters on the scan tool will indicate 0 degrees with the engine running and the CMP actuators in the parked position for both exhaust and intake camshafts.

CMP Actuator Authority

A locking pin keeps the CMP actuators in the parked position in order to avoid valve train noise upon engine start-up. The locking pin will release the actuator after the engine oil pressure is sufficient to overcome the locking pin spring pressure. The exhaust CMP actuators have return springs. The return springs are necessary to assist the CMP actuators to return to the parked position due to the rotational inertia of the valve train components upon engine shutdown.

An oil outlet tube is used to transfer oil from a dedicated oil galley in the engine block, from the replaceable oil filter, up to each head and is located in the timing chain area. The oil outlet tube incorporates a non-replaceable 40 micron oil filter. If the filter becomes clogged with contamination and can not be cleaned, the tube and filter must be replaced as an assembly. Engine oil pressure, level, viscosity, and temperature can have an adverse affect on the CMP actuator performance.

The CMP sensors are used by the ECM to monitor the position of the camshafts. The intake cam sensor wheels have 8X targets. The exhaust cam sensor wheels have a 1X target. The ECM can detect a camshaft position variance as small as 2 degrees. The variance is the difference between the actual camshaft position and the desired camshaft position. A CMP actuator performance DTC will set if the ECM detects the camshaft position has a 2 degree to 11 degree variance. A 2 degree variance takes more time for the ECM to detect than an 11 degree variance. A crankshaft to camshaft correlation DTC will set if the ECM detects a 12 degree variance or more.

If a CMP actuator system DTC is present, the ECM will disable the CMP actuator system control for that ignition cycle.

CMP Actuator System Operation

The engine control module (ECM) sends an electrical signal to the camshaft position (CMP) actuator solenoids through the control circuits when a camshaft timing change is desired. The ground circuit of the CMP actuator solenoid is used as a return. The CMP actuator solenoid uses electromagnetic force to pull on the plunger of the oil control valve. The oil control valve will port the pressurized engine oil to either the advancing or retarding chambers of the CMP actuator. The CMP actuator, in turn, changes the camshaft position relative to crankshaft position. The ECM uses the CMP sensors to determine the position of the camshafts.

The ECM calculates the optimum CMP through the following inputs

1. Engine speed
2. Manifold absolute pressure (MAP)
3. Throttle position indicated angle
4. Crankshaft position (CKP)
5. CMP
6. Engine load
7. Barometric pressure (BARO)

The ECM monitors the following inputs before assuming control of the CMP actuator system

1. Engine coolant temperature (ECT)
2. Loop status
3. Calculated engine oil temperature (EOT)
4. Engine oil pressure (EOP)
5. Engine oil level
6. Crankshaft/camshaft correlation
7. Ignition 1 signal voltage
8. Barometric pressure (BARO)

System Overview

The fuel system is a returnless on-demand design. The fuel pressure regulator is a part of the fuel sender assembly, eliminating the need for a return pipe from the engine. A returnless fuel system reduces the internal temperature of the fuel tank by not returning hot fuel from the engine to the fuel tank. Reducing the internal temperature of the fuel tank results in lower evaporative emissions.

Two fuel tanks store the fuel supply. An electric turbine style fuel pump (13) attaches to the fuel sender assembly inside the left fuel tank. The fuel pump supplies high pressure fuel through the fuel filter (17) and the fuel feed pipe (3) to the fuel injection system. The fuel pump provides fuel at a higher rate of flow than is needed by the fuel injection system. The fuel pump also supplies fuel to the venturi pump (14) located on the bottom of the left fuel sender assembly. The function of the venturi pump is to fill the fuel sender assembly reservoir (12). The primary fuel pressure regulator (15), a part of the left fuel sender assembly, maintains the correct fuel pressure to the fuel injection system. The fuel pump and sender assembly contains a reverse flow check valve (16). The check valve, the primary fuel pressure regulator, and the secondary fuel pressure regulator maintain fuel pressure in the fuel feed pipe and the fuel rail in order to prevent long cranking times.

The fuel pump also supplies a small amount of pressurized fuel through the auxiliary fuel feed pipe (4) to the siphon jet pump (9) inside the right fuel tank. The pressurized fuel creates a venturi action inside the siphon jet pump. The venturi action causes the fuel to be drawn out of the right fuel tank. The fuel transfers from the right fuel tank to the left fuel tank through the auxiliary fuel return pipe (5). The auxiliary fuel return pipe inside the left fuel tank contains an anti-siphon hole (11) in order to prevent fuel from siphoning from the left fuel tank into the right fuel tank. Both the auxiliary fuel feed pipe and the auxiliary fuel return pipe are located inside the convoluted stainless steel crossover hose (10).

The right fuel sender assembly contains a secondary fuel pressure regulator (8). The secondary fuel pressure regulator has a lower set point than the primary regulator in order to allow fuel to flow to the siphon jet pump on the right fuel sender. When the engine is shut off, the pressure in the feed pipes immediately drops to the secondary regulator set point. This prevents the siphon jet pump from operating and in turn prevents the equalization of the left and right fuel tanks. The secondary fuel pressure regulator maintains fuel pressure in the auxiliary fuel feed pipe which reduces the time to prime the siphon jet pump. The pressurization also reduces fuel vaporization and boiling in the auxiliary fuel feed pipe.

Scheme 50

The fuel tanks (6, 8) store the fuel for the vehicle. The fuel tanks are located on the left and right side of the vehicle in front of the rear wheels. The fuel tanks are molded from high density polyethylene.

Fuel Tank Fill Pipe and Hose

The fuel tank fill pipe is positioned at the rear of the vehicle on the left side. A built in restrictor in the fuel tank fill pipe prevents refueling with leaded fuel. The fuel tank fill pipe connects to the left fuel tank with a rubber hose. Fuel transfers to the right fuel tank during fueling by a stainless steel convoluted crossover tube/hose which connects the left fuel tank to the right fuel tank.

Scheme 51

Note. If a fuel tank filler cap requires replacement, use only a fuel tank filler cap with the same features. Failure to use the correct fuel tank filler cap can result in a serious malfunction of the fuel and EVAP system.

The fuel tank filler pipe has a tethered fuel tank filler cap. The fuel tank filler cap requires a quarter of a turn in order to be removed. A torque limiting device prevents the cap from being over tightened.

Scheme 52

A fuel sender assembly is located inside each fuel tank. The fuel sender assembly attaches to the top of each fuel tank. The left fuel sender assembly consists of the following major components

1. The fuel level sensor
2. The fuel pump and reservoir assembly
3. The fuel pump strainer
4. The fuel filter (4)
5. The primary fuel pressure regulator (9)

Scheme 53

The right fuel sender assembly consists of the following major components

1. The fuel level sensor (7)
2. The siphon jet pump (5)
3. The secondary fuel pressure regulator (2)
4. The fill limiter vent valve (FLVV)

Fuel Level Sensor

The fuel level sensor consists of a float, a wire float arm, and a variable resistor. The position of the float arm indicates the fuel level. The fuel level sensor contains a variable resistor, which changes the resistance corresponding to the amount of fuel in the fuel tanks. The ECM uses inputs from both fuel level sensors in order to calculate the total fuel remaining in both fuel tanks. This information is sent via a Class 2 message to the instrument panel cluster (IPC) to be displayed on the fuel gage.

Fuel Pump

An electric turbine style fuel pump attaches to the fuel sender assembly inside the left fuel tank. The fuel pump supplies fuel to the fuel rail assembly at a specified flow and pressure. The fuel pump delivers a constant flow of fuel to the engine even during low fuel conditions and aggressive vehicle maneuvers. The ECM controls the electric fuel pump operation through a fuel pump relay.

The fuel pump also supplies a small amount of pressurized fuel to the right fuel tank siphon jet pump through the auxiliary fuel feed pipe. The pressurized fuel creates a venturi action inside the siphon jet pump. The venturi action causes the fuel to be drawn out of the right fuel tank. Fuel is then transferred from the right fuel tank to the left fuel tank through the auxiliary fuel return pipe. The fuel pump also supplies fuel to a venturi pump located on the bottom of the left fuel sender assembly. The function of the venturi pump is to fill the fuel sender assembly reservoir.

Fuel Strainer

The fuel strainer is made of woven plastic. The functions of the fuel strainer are to filter the contaminants and to wick the fuel. The fuel strainer attaches to the bottom of the fuel pump inside of the fuel sender reservoir. The fuel strainer normally requires no maintenance. Fuel stoppage at this point indicates that the fuel tanks contain an abnormal amount of sediment. If the fuel strainer is plugged, refer to Fuel System Cleaning .

Fuel Filter

The fuel filter is contained in the fuel sender assembly inside the left fuel tank. The paper filter element of the fuel filter traps particles in the fuel that may damage the fuel injection system. The fuel filter housing is made to withstand maximum fuel system pressure, exposure to fuel additives, and changes in temperature. There is no service interval for fuel filter replacement.

Primary Fuel Pressure Regulator

The primary fuel pressure regulator is contained in the left fuel sender assembly. The fuel pressure regulator is a diaphragm relief valve. The diaphragm has fuel pressure on one side and regulator spring pressure on the other side. A software bias compensates the injector on-time because the fuel pressure regulator is not referenced to the manifold vacuum. The primary fuel pressure regulator keeps fuel available to the injectors at a regulated pressure.

Secondary Fuel Pressure Regulator

The right fuel sender assembly contains a secondary fuel pressure regulator. The secondary fuel pressure regulator has a lower set point than the primary regulator in order to allow fuel to flow to the siphon jet pump on the right fuel sender. When the engine is shut off, the pressure in the feed pipes immediately drops to the secondary regulator set point. This prevents the siphon jet pump from operating and in turn prevents the equalization of the left and right fuel tanks. The secondary fuel pressure regulator maintains fuel pressure in the auxiliary fuel feed pipe which reduces the time to prime the siphon jet pump. The pressurization also reduces fuel vaporization and boiling in the auxiliary fuel feed pipe.

Fuel Feed and Return Pipes

The engine compartment connecting fuel pipe connects the chassis fuel pipe to the fuel rail assembly. The engine compartment fuel pipe is constructed of Teflon® with a braided stainless steel covering.

The chassis fuel pipe is located under the vehicle on the left side of the tunnel. The chassis fuel pipe connects the rear fuel feed pipe from the left fuel sender assembly to the engine compartment connecting fuel pipe. The chassis fuel pipe is constructed of aluminum with a plastic coating.

The rear fuel feed pipe connects the left fuel sender fuel pipe to the chassis fuel pipe. The rear fuel feed pipe is constructed of nylon with a covering of heat resistant rubber hose.

The auxiliary fuel feed pipes and the auxiliary fuel return pipes are located inside of the fuel crossover hose and inside of each fuel tank. The fuel pump supplies fuel through the auxiliary fuel feed pipe to the siphon jet pump inside the right fuel tank. The siphon jet pump transfers fuel from the right fuel tank to the left fuel tank through the auxiliary fuel return pipe. The return pipe feeds returning fuel from the right fuel tank directly into the left fuel sender reservoir. The auxiliary fuel feed and return pipes are constructed of nylon.

Scheme 54

The fuel tank crossover tube/hose is comprised of a convoluted stainless steel outer tubing. The crossover tube/hose internally houses the auxiliary fuel feed pipe and the auxiliary fuel return pipe. The crossover tube/hose has the following functions

1. Fuel liquid and vapor transfer during refueling
2. High pressure siphon jet pump feed
3. Low pressure siphon jet pump return
4. Electrostatic discharge ground to body

Nylon Fuel Pipes

Nylon pipes are constructed to withstand maximum fuel system pressure, exposure to fuel additives, and changes in temperature. There are 2 sizes of nylon fuel pipes used. A 9.53 mm (3/8 in) ID pipe is used for the fuel feed pipe and the auxiliary fuel return pipe. A 7.94 mm (5/16 in) ID pipe is used for the auxiliary fuel feed pipe. Heat resistant rubber hose protects the section of the rear fuel feed pipe that is exposed to chafing, high temperature or vibration.

Nylon fuel pipes are somewhat flexible and can be formed around gradual turns under the vehicle. However, if nylon fuel pipes are forced into sharp bends, the pipes will kink and restrict the fuel flow. Also, once exposed to the fuel, nylon pipes may become stiffer and are more likely to kink if bent too far. Take special care when working on a vehicle with nylon fuel pipes.

Quick-Connect Fittings

Quick-connect fittings provide a simplified means of installing and connecting fuel system components. The fittings consist of a unique female connector and a compatible male pipe end. O-rings located inside the female connector provide the fuel seal. Integral locking tabs located inside the female connector hold the fittings together.

Scheme 55

The on-board refueling vapor recovery system (ORVR) is an on board vehicle system designed to recover fuel vapors during the vehicle refueling operation. The flow of liquid fuel down the fuel filler pipe provides a liquid seal which prevents vapor from leaving the fuel filler pipe. An EVAP pipe transports the fuel vapor to the EVAP canister for use by the engine. Listed below are the ORVR system components with a brief description of their operation

1. The EVAP canister (1)-the EVAP canister receives refueling vapor from the fuel system, stores the vapor and releases the vapor to the engine upon demand.
2. The EVAP pipes (2)-transports fuel vapor from the fuel tank to the EVAP canister.
3. The fuel filler pipe (3)-the pipe which carries fuel from the fuel nozzle to the fuel tank.
4. The check valve (4)-the check valve limits fuel "spit back" from the fuel tank during the refueling operation by allowing fuel flow only into the fuel tank. This check valve is located at the bottom of the fuel filler pipe.
5. The modular fuel sender assembly (5)-this assembly pumps fuel to the engine from the fuel tank.
6. The fill limiter vent valve (FLVV) (6)-this valve acts as a shut off valve. The FLVV is located on the right fuel sender. This valve is not serviced separately. The FLVV has the following functions: Controls the fuel tank fill level by closing the primary vent from the fuel tank. Prevents the fuel from exiting the fuel tank via the EVAP pipe to the canister. Provides fuel-spillage protection in the event of a vehicle rollover by closing the vapor path from the fuel tank to the EVAP canister.

Scheme 56

The fuel rail assembly attaches to the engine intake manifold. The fuel rail assembly performs the following functions

1. Positions the injectors in the intake manifold
2. Distributes the fuel evenly to the injectors
3. Integrates the fuel pulse dampener into the fuel metering system

Fuel Injectors

The fuel injector assembly is a solenoid device, controlled by the ECM, that meters pressurized fuel to a single engine cylinder. The ECM energizes the injector solenoid to open a normally closed ball valve. This allows the fuel to flow into the top of the injector, past the ball valve, and through a director plate at the injector outlet. The director plate has machined holes that control the fuel flow, generating a spray of finely-atomized fuel at the injector tip. Fuel from the injector tip is directed at the intake valve, causing the fuel to become further atomized and vaporized before entering the combustion chamber. This fine atomization improves fuel economy and emissions.

Fuel Metering Modes of Operation

The ECM monitors voltages from several sensors in order to determine how much fuel to give the engine. The ECM controls the amount of fuel delivered to the engine by changing the fuel injector pulse width. The fuel is delivered under one of several modes.

Starting Mode

When the ignition is first turned ON, the ECM energizes the fuel pump relay for 2 seconds. This allows the fuel pump to build pressure in the fuel system. The ECM calculates the air/fuel ratio based on inputs from the engine coolant temperature (ECT), mass air flow (MAF), manifold absolute pressure (MAP), and throttle position (TP) sensors. The system stays in starting mode until the engine speed reaches a predetermined RPM.

Clear Flood Mode

If the engine floods, clear the engine by pressing the accelerator pedal down to the floor and then crank the engine. When the TP sensor is at wide open throttle (WOT), the ECM reduces the fuel injector pulse width in order to increase the air to fuel ratio. The ECM holds this injector rate as long as the throttle stays wide open and the engine speed is below a predetermined RPM. If the throttle is not held wide open, the ECM returns to the starting mode.

Run Mode

The run mode has 2 conditions called Open Loop and Closed Loop. When the engine is first started and the engine speed is above a predetermined RPM, the system begins Open Loop operation. The ECM ignores the signal from the heated oxygen sensors (HO2S). The ECM calculates the air/fuel ratio based on inputs from the ECT, MAF, MAP, and TP sensors. The system stays in Open Loop until meeting the following conditions

1. Both front HO2S have varying voltage output, showing that both HO2S are hot enough to operate properly.
2. The ECT sensor is above a specified temperature.
3. A specific amount of time has elapsed after starting the engine.

Specific values for the above conditions exist for each different engine, and are stored in the electrically erasable programmable read-only memory (EEPROM). The system begins Closed Loop operation after reaching these values. In Closed Loop, the ECM calculates the air/fuel ratio, injector ON time, based upon the signal from various sensors, but mainly from the HO2S. This allows the air/fuel ratio to stay very close to 14.7:1.

Acceleration Mode

When the driver pushes on the accelerator pedal, air flow into the cylinders increases rapidly. To prevent possible hesitation, the ECM increases the pulse width to the injectors to provide extra fuel during acceleration. This is also known as power enrichment. The ECM determines the amount of fuel required based upon the TP, the ECT, the MAP, the MAF, and the engine speed.

Deceleration Mode

When the driver releases the accelerator pedal, air flow into the engine is reduced. The ECM monitors the corresponding changes in the TP, the MAP, and the MAF. The ECM shuts OFF fuel completely if the deceleration is very rapid, or for long periods, such as long, closed-throttle coast-down. The fuel shuts OFF in order to prevent damage to the catalytic converters.

Battery Voltage Correction Mode

When the battery voltage is low, the ECM compensates for the weak spark delivered by the ignition system in the following ways

1. Increasing the amount of fuel delivered
2. Increasing the idle RPM
3. Increasing the ignition dwell time

Fuel Cutoff Mode

The ECM cuts OFF fuel from the fuel injectors when the following conditions are met in order to protect the powertrain from damage and improve driveability

1. The ignition is OFF. This prevents engine run-on.
2. The ignition is ON but there is no ignition reference signal. This prevents flooding or backfiring.
3. The engine speed is too high, above red line.
4. The vehicle speed is too high, above rated tire speed.
5. During an extended, high speed, closed throttle coast down-This reduces emissions and increases engine braking.
6. During extended deceleration, in order to prevent damage to the catalytic converters

Fuel Trim

The ECM controls the air/fuel metering system in order to provide the best possible combination of driveability, fuel economy, and emission control. The ECM monitors the HO2S signal voltage while in Closed Loop and regulates the fuel delivery by adjusting the pulse width of the injectors based on this signal. The ideal fuel trim values are around 0 percent for both short and long term fuel trim. A positive fuel trim value indicates the ECM is adding fuel in order to compensate for a lean condition by increasing the pulse width. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition by decreasing the pulse width. A change made to the fuel delivery changes the long and short term fuel trim values. The short term fuel trim values change rapidly in response to the HO2S signal voltage. These changes fine tune the engine fueling. The long term fuel trim makes coarse adjustments to fueling in order to re-center and restore control to short term fuel trim. A scan tool can be used to monitor the short and long term fuel trim values. The long term fuel trim diagnostic is based on an average of several of the long term speed load learn cells. The ECM selects the cells based on the engine speed and engine load. If the ECM detects an excessively lean or rich condition, the ECM will set a fuel trim diagnostic trouble code (DTC).

EVAP System Operation

The evaporative emission (EVAP) control system limits fuel vapors from escaping into the atmosphere. Fuel tank vapors move from the fuel tank, due to pressure in the tank, through the vapor pipe, into the EVAP canister. Carbon in the canister absorbs and stores the fuel vapors. Excess pressure is vented through the vent line and EVAP vent solenoid to the atmosphere. The EVAP canister stores the fuel vapors until the engine is able to use them. At an appropriate time, the control module will command the EVAP purge solenoid ON, allowing engine vacuum to be applied to the EVAP canister. With the EVAP vent solenoid OFF, fresh air is drawn through the vent solenoid and the vent line to the EVAP canister. Fresh air is drawn through the canister, pulling fuel vapors from the carbon. The air/fuel vapor mixture continues through the EVAP purge pipe and EVAP purge solenoid into the intake manifold to be consumed during normal combustion. The control module uses several tests to determine if the EVAP system is leaking.

Large Leak Test

This tests for large leaks and blockages in the EVAP system. The control module commands the EVAP vent solenoid ON and commands the EVAP purge solenoid ON, with the engine running, allowing engine vacuum into the EVAP system. The control module monitors the fuel tank pressure (FTP) sensor voltage to verify that the system is able to reach a predetermined level of vacuum within a set amount of time. The control module then commands the EVAP purge solenoid OFF, sealing the system, and monitors the vacuum level for decay. If the control module does not detect that the predetermined vacuum level was achieved, or the vacuum decay rate is more than a calibrated level on 2 consecutive tests, DTC P0455 will set.

Small Leak Test

The engine off natural vacuum (EONV) diagnostic is the small-leak detection diagnostic for the EVAP system. The EONV diagnostic monitors the EVAP system pressure or vacuum with the key OFF. Because of this, it may be normal for the control module to remain active for up to 40 minutes after the engine is turned OFF. This is important to remember when performing a parasitic draw test on vehicles equipped with EONV.

The EONV utilizes the temperature changes and the resulting naturally occurring vacuum or pressure in the fuel tank immediately following a drive cycle. When the vehicle is driven, the temperature rises in the tank. After the vehicle is parked, the temperature in the tank continues to rise for a period of time, then begins to decrease. The EONV diagnostic relies on this temperature change and it's corresponding pressure change to determine if an EVAP system leak is present.

The EONV diagnostic is designed to detect leaks as small as 0.51 mm (0.020 inches). The diagnostic can determine if a small leak is present based on vacuum or pressure readings in the EVAP system. When the system is sealed, a finite amount of pressure or vacuum will be observed. When a 0.51 mm (0.020 inches) leak is present, little or no pressure or vacuum is observed. If the test reports a failing value, DTC P0442 will set.

Canister Vent Restriction Test

If the EVAP vent system is restricted, fuel vapors will not be properly purged from the EVAP canister. The control module tests this by commanding the EVAP purge solenoid ON, commanding the EVAP vent solenoid OFF, and monitoring the FTP sensor for an increase in vacuum. If the vacuum increases more than a calibrated value, DTC P0446 will set.

Purge Solenoid Leak Test

If the EVAP purge solenoid does not seal properly fuel vapors could enter the engine at an undesired time, causing driveability concerns. The control module tests for this by commanding the EVAP purge solenoid OFF and the vent solenoid ON, sealing the system, and monitors the FTP for an increase in vacuum. If the control module detects that the EVAP system vacuum increases above a calibrated value, DTC P0496 will set.

Check Gas Cap Message

The PCM sends a class 2 message to the driver information center (DIC) illuminating the Check Gas Cap message when any of the following occur

1. A malfunction in the EVAP system and a large leak test fails
2. A malfunction in the EVAP system and a small leak test fails

EVAP System Components

The EVAP system consists of the following components

EVAP Canister

The canister is filled with carbon pellets used to absorb and store fuel vapors. Fuel vapor is stored in the canister until the control module determines that the vapor can be consumed in the normal combustion process.

EVAP Purge Solenoid

The EVAP purge solenoid controls the flow of vapors from the EVAP system to the intake manifold. The purge solenoid opens when commanded ON by the control module. This normally closed solenoid is pulse width modulated (PWM) by the control module to precisely control the flow of fuel vapor to the engine. The solenoid will also be opened during some portions of the EVAP testing, allowing engine vacuum to enter the EVAP system.

EVAP Vent Solenoid

The EVAP vent solenoid controls fresh airflow into the EVAP canister. The solenoid is normally open. The control module commands the solenoid ON, closing the solenoid during some EVAP tests, allowing the system to be tested for leaks.

Fuel Tank Pressure Sensor

The FTP sensor measures the difference between the pressure or vacuum in the fuel tank and outside air pressure. The control module provides a 5-volt reference and a ground to the FTP sensor. The FTP sensor provides a signal voltage to the control module that can vary between 0.1-4.9 volts. A high FTP sensor voltage indicates a low fuel tank pressure or vacuum. A low FTP sensor voltage indicates a high fuel tank pressure.

EVAP Service Port

The EVAP service port is located in the EVAP purge pipe between the EVAP purge solenoid and the EVAP canister. The service port is identified by a green colored cap.

Electronic Ignition (EI) System Operation

The electronic ignition (EI) system produces and controls the high energy secondary spark. This spark ignites the compressed air/fuel mixture at precisely the correct time, providing optimal performance, fuel economy, and control of exhaust emissions. The engine control module (ECM) primarily collects information from the crankshaft position (CKP) and camshaft position (CMP) sensors to control the sequence, dwell, and timing of the spark.

Crankshaft Position (CKP) Sensor

The crankshaft position (CKP) sensor circuits consist of an engine control module (ECM) supplied 5-volt reference circuit, a low reference circuit, and an output signal circuit. The CKP sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a 58-tooth reluctor wheel on the crankshaft. Each tooth on the reluctor wheel is spaced at 60-tooth spacing, with 2 missing teeth for the reference gap. The CKP sensor produces an ON/OFF DC voltage of varying frequency, with 58 output pulses per crankshaft revolution. The frequency of the CKP sensor output depends on the velocity of the crankshaft. The CKP sensor sends a digital signal, which represents an image of the crankshaft reluctor wheel, to the ECM as each tooth on the wheel rotates past the CKP sensor. The ECM uses each CKP signal pulse to determine crankshaft speed and decodes the crankshaft reluctor wheel reference gap to identify crankshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses CKP sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing, and to detect cylinder misfire.

Crankshaft Reluctor Wheel

The crankshaft reluctor wheel is part of the crankshaft. The reluctor wheel consists of 58 teeth and a reference gap. Each tooth on the reluctor wheel is spaced 6 degrees apart with a 12-degree space for the reference gap. The pulse from the reference gap is known as the sync pulse. The sync pulse is used to synchronize the coil firing sequence with the crankshaft position, while the other teeth provide cylinder location during a revolution.

Camshaft Position (CMP) Sensor

The camshaft position (CMP) sensor is triggered by a notched reluctor wheel built onto the exhaust camshaft sprocket. The CMP sensor provides four signal pulses every camshaft revolution. Each notch, or feature of the reluctor wheel is of a different size which is used to identify the compression stroke of each cylinder and to enable sequential fuel injection. The CMP sensor is connected to the engine control module (ECM) by the following circuits

1. A 5-volt reference circuit
2. A low reference circuit
3. A signal circuit

Ignition Coil/Module

Each ignition coil/module has the following circuits

1. An ignition voltage circuit
2. A ground
3. An ignition control (IC) circuit
4. A low reference circuit

The engine control module (ECM) controls the individual coils by transmitting timing pulses on the IC circuit of each ignition coil/module to enable a spark event.

The spark plugs are connected to each coil by a short boot. The boot contains a spring that conducts the spark energy from the coil to the spark plug. The spark plug electrode is tipped with platinum for long wear and higher efficiency.

Engine Control Module (ECM)

The engine control module (ECM) controls all ignition system functions, and constantly corrects the spark timing. The ECM monitors information from various sensor inputs that include the following

1. The throttle position (TP) sensor
2. The engine coolant temperature (ECT) sensor
3. The mass air flow (MAF) sensor
4. The intake air temperature (IAT) sensor
5. The vehicle speed sensor (VSS)
6. The engine knock sensor (KS)
7. The manifold absolute pressure (MAP) sensor

Modes of Operation

During normal operation the engine control module (ECM) controls all ignition functions. If either the crankshaft position (CKP) or camshaft position (CMP) sensor signal is lost, the engine will continue to run because the ECM will default to a limp home mode using the remaining sensor input. Each coil is internally protected against damage from excessive voltage. If one or more coils were to fail in this manner, a misfiring condition would result. Diagnostic trouble codes are available to accurately diagnose the ignition system with a scan tool.

Special Tools

Special Tools Illustration Tool Number/Description GE 41415-50 Fuel Tank Cap Adapter J 22610 Keystone Clamp Pliers J 23738-A Mityvac J 26792 HEI Spark Tester J 34730-1A Fuel Pressure Gage J 36012-A Ignition System Diagnostic Harness J 37088-A Fuel Line Disconnect Tool Set J 37287 Fuel Line Shut-Off Adapters J 38522 Variable Signal Generator J 39021 Fuel Injector Coil and Balance Tester J 39765-A Fuel Sender Lock Ring Tool J 41413-200 Evaporative Emissions System Tester (EEST) J 41413-300 EVAP Cap and Plug Kit J 41413-306 EVAP Plug J 41413-307 EVAP Plug J 41413-311 EVAP Plug J 41413-SPT High Intensity White Light J 41413-VLV EVAP Service Port Vent Fitting J 41415-40 Fuel Tank Cap Adapter J 43094 Spark Plug Boot Puller J 43244 Relay Puller Pliers J 44175 Fuel Composition Tester J 44602 Injector Test Adapter J 44603 Injector Test Lamp J 45004 Fuel Tank Drain Hose

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See also:
• DTC P0010, P0013, P0020, or P0023
• DTC P0134 or P0154
• DTC P0366 or P0391
• DTC P0651
• DTC P2123
• Wheelhouse Filler Replacement
• Fastener Notice
• Control Module References
• Diagnostic Trouble Code (DTC) List - Vehicle
• Cooling System Draining and Filling (Static Fill)
• Cooling System Draining and Filling (GE 47716)
• Intake Manifold Replacement
• OXYGEN SENSOR NOTICE
• Crankcase Ventilation Hoses/Pipes Replacement
• Lifting and Jacking the Vehicle
• Instrument Panel Insulator Panel Replacement - Left Side
• Gasoline/Gasoline Vapors Caution
• FUEL STORAGE CAUTION
• Driveline Support Assembly Replacement
• Battery Negative Cable Disconnection and Connection
• Tire and Wheel Removal and Installation
• Rear Wheelhouse Liner Panel Replacement
• Exhaust Muffler Replacement - Left Side
• Transmitter Programming (Domestic and Japan)
• Transmitter Programming (Export - Including Canada)
• Battery Disconnect Caution
• CLEAN, DRY, LOW PRESSURE GAS SOURCE NOTICE
• Spark Plug Inspection
• Crankshaft Position System Variation Learn
• Remote Power Steering Fluid Reservoir Replacement
• Special Tools
• Air Cleaner Assembly Replacement
• Metal Collar Quick Connect Fitting Service
• Ignition System Specifications
• Fuel System Cleaning