Camry Wagon V6-3.0L (1MZ-FE) (1994)
EGR Backpressure Transducer: Testing and Inspection
PROCEDURE
1. Disconnect the following vacuum hoses from the Exhaust Gas Recirculation (EGR) Vacuum Modulator
Vacuum hose from P port (1)
Vacuum hose from Q port (2)
Vacuum hose from R port (3)
2. Inspect EGR Vacuum Modulator operation.
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Block ports P and R with your finger.
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Blow air into port Q, and check that the air passes through to the air filter side freely.
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Start the engine, and maintain speed at 3.500 rpm.
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Repeat the above test. Check that there is a strong resistance to air flow.
3. Reconnect vacuum hoses to EGR Vacuum Modulator
Vacuum hose from P port (1)
Vacuum hose from Q port (2)
Vacuum hose from R port (3)