EGR Control Solenoid: Testing and Inspection

Electric EGR Transducer (EET):

TRANSDUCER ELECTRICAL SOLENOID TEST
1. Verify there is manifold vacuum (minimum of 15 in.Hg) present at the solenoid. If there is not repair as necessary.
2. Install a scan tool (DRBII or equivalent) to the vehicles [1][2]diagnostic connector.
3. Tee a vacuum gauge between transducer and EGR valve.
4. Energize the solenoid using the scan tool. A clicking noise should be heard as the solenoid energizes and de-energizes. Vacuum to the EGR valve should be shut on and off as solenoid cycles.
5. If the solenoid does not operate properly replace EGR valve and transducer/solenoid as an assembly.
6. If the solenoid operates properly test the transducer.

EGR Transducer:

TRANSDUCER VACUUM DIAPHRAGM TEST
1. Disconnect the transducer back-pressure line and the vacuum lines.
2. Plug the output port of the transducer, and connect a hand held air pump to the back-pressure port. Apply 1 to 2 psi air pressure.
3. Connect a hand held vacuum pump to the input port of the transducer and apply at least 12 in Hg vacuum.
4. Verify that the transducer holds vacuum then bleeds off slowly, if it does not, replace EGR valve and transducer/solenoid as an assembly.