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Home >> Lexus >> 2007 >> GX 470 V8-4.7L (2UZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Air Injection >> Testing and Inspection
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Air Injection: Testing and Inspection

ON-VEHICLE INSPECTION




1. INSPECT PRESSURE SENSOR

a. Turn the ignition switch to the ON position.
b. Measure the voltage between terminals E5-32 (AIP) and E5-28 (E2) of the ECM connector.

Standard voltage: 1.0 to 2.2 V

If the voltage is not as specified, replace the pressure sensor, wire harness or ECM.




2. INSPECT VSV FOR AIR INJECTION SYSTEM

a. Disconnect the connector from the VSV (Procedure "A").
b. Disconnect the 2 vacuum hoses from the VSV (Procedure "B").







c. Using an ohmmeter, measure the resistance between the terminals (Procedure "C").

If the resistance is not as specified, replace the VSV.




d. Check that air does not flow from the port as shown in the illustration (Procedure "D").

If the result is not as specified, replace the VSV.




e. Apply positive battery between the terminals, and check that air flows from the port (Procedure "E").

If the result is not as specified, replace the VSV.

f. Connect the 2 vacuum hoses to the VSV (Procedure "F").

NOTE: Be sure to connect the vacuum hoses correctly.

g. Connect the connector to the VSV (Procedure "G").
h. Perform procedures "A" to "G" for the other VSV.
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