EGR Control Solenoid: Testing and Inspection

INSPECTION








Using Scan tool

Check Item: Exhaust Gas Recirculation Control Solenoid Valve.
Drive Content: Change Solenoid Valve from OFF to ON.
Check Conditions: Ignition Switch ON.
- Operating sound is heard when activated.

Actuator Inspection

1. Disconnect the green striped vacuum hose from the Solenoid Valve.
2. Disconnect the harness connector.





3. Connect a vacuum pump to the nipple which the vacuum hose was connected.
4. Apply vacuum and verify the following conditions;





- When battery voltage is applied across the terminals vacuum is held.
- When battery voltage is disconnected vacuum is released.





5. Measure the resistance between the terminals of the Canister Purge Solenoid Valve.

Resistance: 36 - 44 ohms at 20°C (68°F).

6. If not all conditions are met, replace the Solenoid Valve.

Harness Inspection Procedure





1. Measure the power supply voltage.
- Connector disconnected.
- Ignition switch ON.
- Voltage should read system voltage.

If OK - go to step 2.
If not OK - Repair the harness (H2 - MFI Control Relay).





2. Check for an open circuit, or a short circuit to ground between the Exhaust Gas Recirculation Control Solenoid Valve and Engine Control Module.
- Exhaust Gas Recirculation Control Solenoid Valve connector disconnected.
- Engine Control Module connector disconnected.

If OK - END.
If not OK - Repair the harness (H1 - C50-4 8).

Troubleshooting Hints
If the results of Exhaust Gas Recirculation Control Solenoid Valve on-vehicle and off-vehicle inspections are normal but the Diagnostic Trouble Code for Exhaust Gas Recirculation system failure is displayed, check the Exhaust Gas Recirculation Valve, vacuum hose and Exhaust Gas Recirculation passage for blocking.