EGR Control Solenoid: Testing and Inspection

1. Disconnect the vacuum hose from the EGR solenoid.

NOTE: When disconnecting the vacuum hose, always make sure that it can be reconnected at its original position.

2. Disconnect the harness connector.
3. Connect a hand vacuum pump to nipple (A) of the EGR solenoid. (Refer to the illustration at left.)
4. As described in the chart below, check airtightness by applying a vacuum with voltage applied directly from the battery to the EGR solenoid and without applying voltage.

BATTERY POSITIVE VOLTAGE NORMAL CONDITION
Not applied Vacuum leaks
Applied Vacuum maintained





5. Measure the resistance between the terminals of the EGR solenoid

Standard value: 29 - 35 ohms @ 20 °C (68 °F)

6. Replace the solenoid if resistance is out of specification.