3.
Monitor the "PCSV" parameters on the scantool.
The purge solenoid is a pneumatic device that meters the air and fuel (purge) vapor flow to the purge port. In a sense, the purge solenoid is comparable to a fuel injector, because the metered purge flow follows the same slope and offset characteristics. However, the purge solenoid normally runs with a duty cycle at a fixed frequency because the opening response is significantly slower than a fuel injector. It would not practical to run the solenoid synchronously with engine events except perhaps at very low RPM. The normal frequencies for the purge solenoid are between 8 and 20 Hz.
If there is Short in PCSV circuit, PCM sets DTC P0445.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Circuit continuity check | ● Poor connection ● Short to battery in control circuit ● PCSV ● PCM |
Enable Conditions | ||
Threshold Value | ● Short to battery | |
Diagnostic Time | ● Continuous | |
MIL | ● ON |
Connect scantool to Data Link Connector(DLC).
Warm up the engine to normal operating temperature.
Monitor the "PCSV" parameters on the scantool.
Are the parameters displayed correctly?
▶ Fault is intermittent caused by poor contact in the sensor’s and/or ECM’s connector or wasrepaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poorconnection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.
▶ Go to "Terminal and connector inspection" procedure.
Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
▶ Repair as necessary and go to "Verification of vehicle Repair" procedure.
▶ Go to "PCSV circuit inspection" procedure.
Key "OFF".
Disconnect PCSV connector.
key "ON" ＆ ENG "OFF".
Measure the voltage between terminal 1 of PCSV harness connector and chassis ground.
Specification : B+
Is the measured voltage within specification ?
▶ Go to "Control circuit inspection" procedure.
▶ Repair Open or Short to ground circuit and then, go to "Verification of Vehicle Repair" procedure.
Key "OFF".
Disconnect PCSV connector.
Key "ON" ＆ ENG "OFF".
Measure the voltage between terminal 2 of PCSV harness connector and chassis ground.
Specification : Approx 3.5V
Is the measured voltage within specification?
▶ Go to "Component inspection" procedure.
▶ Repair Open or Short to ground circuit and then, go to "Verification of Vehicle Repair" procedure.
PCSV check.
Key "OFF".
Disconnect PCSV harness connector.
Measure the resistance between terminal 1 and 2 of PCSV harness connector.(Component side)
ITEM | Specification |
PCSV Coil Resistance (Ω) | 26Ω at 20℃ (68℉) |
Is the measured resistance within specification?
▶ Substitute with a known-good ECM and check for proper operation. If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.
▶ Substitute with a known-good PCSV and check for proper operation. If the problem is corrected, replace PCSV and then go to "Verification of Vehicle Repair" procedure
After a repair, it is essential to verify that the fault has been corrected.
Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.
Clear the DTCs and Operate the vehicle within DTC Enable conditions in General information.
Are any DTCs present ?
▶ Go to the applicable troubleshooting procedure.
▶ System is performing to specification at this time.
