EGR Solenoid

OPERATION
- The EGR solenoid is a duty control type solenoid valve. It makes control by leaking EGR valve operating negative pressure to the throttle body A port.
- Power supply from the battery is sent through the MFI relay to the EGR solenoid. When the engine control module turns off the power transistor inside the module, current no more flows through the coil and EGR valve operating negative pressure leaks.

TROUBLESHOOTING HINT
If the results of EGR solenoid on-vehicle and off-vehicle inspections are normal but the diagnostic trouble code for EGR system failure is displayed, check the EGR valve, vacuum hose and EGR passage for blocking.

INSPECTION





Using Scan Tool

HARNESS INSPECTION





Measure the power supply voltage.
- Connector: Disconnected
- Ignition switch: ON
Voltage (V): Battery positive voltage
OK: GO TO STEP 2
NG: Repair the harness. (A1-MFI relay)





Check for an open-circuit, or a short-circuit to ground between the EGR solenoid and the engine control module.
- EGR solenoid connector: Disconnected
- Engine control module connector: Disconnected
OK: STOP
NG: Repair the harness. (A2-6)