GX 470 V8-4.7L (2UZ-FE) (2004)
Fuel Pressure: Testing and Inspection
ON-VEHICLE INSPECTION
1. CHECK FUEL PUMP OPERATION AND FUEL LEAK
a. When using the hand-held tester
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and hand-held tester main switch ON.
NOTE: Do not start the engine.
3. Select the ACTIVE TEST mode on the hand-held tester.
4. Please refer to the hand-held tester operator's manual for further details.
b. When not using hand-held tester
1. Remove the circuit opening relay.
2. Using a service wire, connect terminals FP and +B of the relay block.
NOTE: Pay due attention to the terminal connecting position to avoid a malfunction.
3. Turn the ignition switch ON, and check that the fuel pump operates.
NOTE: Do not start the engine.
c. Check that there are no fuel leaks after doing maintenance anywhere on the fuel system.
d. Check that the pulsation damper screw rises up when the fuel pump operates.
If operation is not as specified,check these parts:
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Fusible link
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Fuses
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EFI main relay
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Fuel pump ECM
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Wiring connections
e. Turn the ignition switch OFF.
f.
Disconnect the hand-held tester from the DLC3.
2. CHECK FUEL PRESSURE