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Home >> Lexus >> 1995 >> GS 300 L6-3.0L (2JZ-GE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> EGR Backpressure Transducer >> Testing and Inspection
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EGR Backpressure Transducer: Testing and Inspection




EGR VACUUM MODULATOR INSPECTION
1. Disconnect vacuum hoses from Exhaust Gas Recirculation (EGR) vacuum modulator.
- Disconnect the 3 vacuum hoses from ports P, 0 and R of the EGR vacuum modulator.
2. Inspect EGR vacuum modulator operation.
- Block ports P and R with your finger.
- Blow air into port Q, and check that the air passes through to the air filter side freely.




- Start the engine, and maintain speed at 2,500 rpm.
- Repeat the above test. Check that there is a strong resistance to air flow.
3. Reconnect vacuum hoses to EGR vacuum modulator.
- Connect the 3 vacuum hoses to the proper locations.


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