EGR Backpressure Transducer: Testing and Inspection

NOTE: When disconnecting the vacuum hose place an identification mark on it for proper re-connection.

ELECTRIC EGR TRANSDUCER SOLENOID INSPECTION
1. Disconnect the vacuum hose from the electric EGR transducer.
2. Disconnect the harness connector.
3. Plug nipple (A).
4. Connect the hand vacuum pump to nipple (B).
5. Connect a positive pressure-type hand pump to nipple (C).
6. Use a jumper wire to connect the solenoid terminal to the battery terminal.
7. Turn ON and OFF the negative battery terminal side jumper wire and apply vacuum and positive pressure to check the air tightness.

Jumper Wire Disconnected
- Positive Pressure Not applied = Vacuum Leaks
- Positive Pressure Applied = Vacuum Maintained

Jumper Wire Connected
- Positive Pressure Not applied = Vacuum Maintained

8. Measure the resistance between the solenoid terminals.
- Standard value: 25-35 ohms [at 20°C (68°F)].