P0458

P0458

Component Location:

General Description
The Purge control solenoid valve (PCSV) is a device used to meter vapor flow to the engine. The PCM controls the PCSV using a duty cycle signal.

DTC Description
If there is Short to ground in PCSV circuit, PCM sets DTC P0458.

DTC Detecting Condition:

Specification:

Signal Waveform:

Schematic Diagram:

Monitor Scantool Data
1. Connect scantool to Data Link Connector (DLC).
2. Warm up the engine to normal operating temperature.
3. Monitor the "PCSV" parameters on the scantool.






4. Are the parameters displayed correctly?

YES - Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.

NO - Go to "Terminal & Connector Inspection" procedure.

Terminal and Connector Inspection
1. 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.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination,deterioration, or damage.
3. Has a problem been found?

YES - Repair as necessary and go to "Verification of vehicle Repair" procedure

NO - Go to "PCSV circuit inspection" procedure.

Power Supply Circuit Inspection
1. Key "OFF".
2. Disconnect PCSV connector.
3. Key "ON".
4. Measure the voltage between terminal 1 of PCSV harness connector and chassis ground.

Specification : B +






5. Is the measured voltage within specification?

YES - Go to "Control circuit inspection" procedure.

NO - Repair Open or Short to ground circuit and then, go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection
1. Key "OFF".
2. Disconnect PCSV connector.
3. key "ON".
4. Measure the voltage between terminal 2 of PCSV harness connector and chassis ground.

Specification : Approx. 3.5 V






5. Is the measured voltage within specification?

YES - Go to "Component inspection" procedure.

NO - Repair Short to ground circuit and then, go to "Verification of Vehicle Repair" procedure.

Component Inspection
1. PCSV Check
1. Key "OFF".
2. Disconnect PCSV harness connector.
3. Measure the resistance between terminal 1 and 2 of PCSV harness connector. (Component side)

Specification :






4. Is the measured resistance within specification?

YES - 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.

NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others

NO - 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.

Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Clear the DTCs and Operate the vehicle within DTC Enable conditions in General information.
3. Are any DTCs present?

YES - Go to the applicable troubleshooting procedure.

NO - System is performing to specification at this time.