EGR Solenoid Circuit

WHEN MONITORED
With the ignition ON and the engine running.

SET CONDITION
The EGR solenoid control circuit is not in the expected state when requested to operate by the PCM.

THEORY OF OPERATION
The EGR solenoid is actuated by the PCM when the engine is at normal operating temperature, the throttle position sensor shows other than idle or wide open throttle, and the MAP is in mid operating range.

- The PCM looks for a current spike when actuating the solenoid.

- If the spike is not present, the PCM sets a trouble code.

PROBABLE CAUSES
- Open Or Shorted Control Circuit
- Open Fused Ignition Switch Output Circuit
- Open Or Shorted Solenoid Control Coil
- PCM Failure