VUE FWD V6-3.5L (2008)
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The fuel pump may need to be commanded ON a few times in order to obtain the highest possible fuel pressure.
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Before proceeding with this test review the User Manual CH 48027-5 for Safety Information and Instructions.
1. Ignition OFF, all accessories OFF, install a CH-48027-100 . Refer to Fuel Pressure Gage Installation and Removal (See: Fuel Pressure Gage
Installation and Removal) .
2. Ignition ON, engine OFF, command the fuel pump ON with a scan tool. Verify the fuel pressure is between 384-425 kPa (56-62 psi) and does not
decrease more than 100 kPa (14.5 psi) in 5 minutes.
Circuit/System Testing
Important:
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The fuel pump may need to be commanded ON a few times in order to obtain the highest possible fuel pressure.
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DO NOT start the engine.
1. Ignition ON, engine OFF, command the fuel pump ON with a scan tool and observe the fuel pressure gage while the fuel pump is operating. Verify
the fuel pressure is between 384-425 kPa (56-62 psi).
‹› If the fuel pressure is greater than the specified range, replace the primary fuel tank module.
‹› If the fuel pressure is less than the specified range, test, inspect, and repair the items listed below. If all items test normal, replace the primary
fuel tank module.
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Restricted fuel feed pipe
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Inspect the harness connectors and the ground circuits of the fuel pump for poor connections.
2. Verify that the fuel pressure does not decrease more than 100 kPa (14.5 psi) in 5 minutes.
‹› If the fuel pressure decreases more than the specified value, perform the following procedure:
1. Ignition OFF, relieve the fuel pressure. Refer to Fuel Pressure Relief (With CH 48027-100) (See: Fuel Filter/Fuel Pressure Release/Service
and Repair/Fuel Pressure Relief (With CH 48027-100))Fuel Pressure Relief (Without CH 48027-100) (See: Fuel Filter/Fuel Pressure
Release/Service and Repair/Fuel Pressure Relief (Without CH 48027-100)) .
2. Disconnect the chassis fuel feed hose from the engine compartment fuel pipe. Refer to Metal Collar Quick Connect Fitting Service (See: Fuel
Line Coupler/Service and Repair/Metal Collar Quick Connect Fitting Service) .
3. Connect the chassis fuel feed hose to the inlet side ofSA9127E-7 using the J 43937 .
4. Connect the engine compartment fuel pipe to the ON/OFF valve side of theSA9127E-7 using the J 43937 .
5. Cap the pressure test port on theSA9127E-7 with the J 43936 .
6. Open the valve on theSA9127E-7 .
7. Ignition ON, command the fuel pump ON with a scan tool and bleed the air from the CH-48027-100 .
8. Command the fuel pump ON for a minimum of 10 seconds with a scan tool.
9. Close the valve on theSA9127E-7 .
10. Monitor the fuel pressure for 5 minutes.
‹› If the fuel pressure decreases more than 55 kPa (8 psi) within the specified time, locate and replace the leaking fuel injectors.
‹› If the fuel pressure does not decrease more than 55 kPa (8 psi) within the specified time, replace the primary fuel tank module.
3. Relieve the fuel pressure to 69 kPa (10 psi). Verify that the fuel pressure does not decrease more than 14 kPa (2 psi) in 5 minutes.
‹› If the fuel pressure decreases more than the specified value, replace the primary fuel tank module.
4. Operate the vehicle within the conditions of the customer's concern while monitoring the fuel pressure with the CH-48027-100 . The fuel pressure
should not drop off during acceleration, cruise, or hard cornering.
‹› If the fuel pressure drops off, test, inspect, and repair the items listed below. If all items test normal, replace the primary fuel tank module.
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Restricted fuel feed pipe
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Inspect the harness connectors and the ground circuits of the fuel pump for poor connections.
5. If the fuel system tests normal, Refer to Symptoms - Engine Controls (See: Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures/Symptoms - Engine Controls) .
Repair Instructions
Perform the Diagnostic Repair Verification (See: Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and
