EVAP Purge Solenoid Circuit Failure Code

NAME OF CODE:
Evaporative Purge Solenoid Circuit

WHEN MONITORED:
With the ignition key ON and the engine running.

SET CONDITION:
After the arming conditions are satisfied: not powering down, not already in limp-in, time since the last solenoid activation>72 micro seconds. The PCM will set a trouble code if the actual state of the solenoid does not match the intended state.

THEORY OF OPERATION:
The EVAP purge solenoid is mounted on the right side shock tower. Its purpose is to regulate, by means of a duty cycle, the flow of vapors from the EVAP canister to the throttle body. The PCM controls the time the solenoid is ON during a duty cycle. During off idle operations (higher flows), higher percentages of duty cycle are used. At idle (lower flow), lower percentages of duty cycle are used.

POSSIBLE CAUSES:
- Open or shorted control circuit
- Open fused ignition switch output circuit
- Open or shorted solenoid control coil
- PCM failure
- Connector wires or terminals