EGR Control Solenoid: Testing and Inspection
INSPECTION OF VENT VALVE1. Disconnect the vacuum hoses.
Checking Vent Valve:
2. Blow through the vent hose and verify that air passes.
3. Disconnect the duty solenoid valve connector.
4. Apply battery power and ground the solenoid valve as shown.
5. Blow through the vent hose and verify that air does not flow.
6. If a problem is found, replace the duty solenoid valve.
INSPECTION OF VACUUM VALVE
1. Disconnect the vacuum hoses.
Checking Vacuum Valve:
2. Blow through the vacuum hose and verify that air does not flow.
3. Disconnect the duty solenoid valve connector.
4. Apply battery power and ground the solenoid valve as shown.
5. Blow through the vacuum hose and verify that air passes.
6. If a problem is found, replace the duty solenoid valve.
INSPECTION OF VOLTAGE
1. Remove the rubber boot from the connector.
2. Turn the ignition switch on.
Checking Duty Solenoid Valve Connector:
3. Using a voltmeter, verify that the voltage at each terminal is approximately 12 volts.
4. If on any terminal it is not, check the duty solenoid valve, the wiring of the valve, and the "2C" and "2D" terminals of the engine control unit.