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DTC P0458 EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT LOW

DTC P0458 EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT LOW

DTC DETECTING CONDITION:


• Two consecutive driving cycles with fault

• GENERAL DESCRIPTION


TROUBLE SYMPTOM:

Erroneous idling

Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK OUTPUT SIGNAL FROM ECM.

Turn the ignition switch to ON.

Measure the voltage between ECM and chassis ground.

Connector & terminal

(B84) No. 16 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes

• Even if malfunction indicator light lights up, the circuit has returned to a normal condition at this time.


No


CHECK HARNESS BETWEEN PURGE CONTROL SOLENOID VALVE AND ECM CONNECTOR.

Turn the ignition switch to OFF.

Disconnect the connectors from purge control solenoid valve and ECM.

Measure the resistance of harness between purge control solenoid valve connector and engine ground.

Connector & terminal

(E4) No. 2 — Engine ground:

Is the resistance more than 1 MΩ?

Yes


No

Repair the ground short circuit in harness between ECM and purge control solenoid valve connector.


CHECK HARNESS BETWEEN PURGE CONTROL SOLENOID VALVE AND ECM CONNECTOR.

Measure the resistance of harness between ECM and purge control solenoid valve of harness connector.

Connector & terminal

(B84) No. 16 — (E4) No. 2:

Is the resistance less than 1 Ω?

Yes


No

• Repair the open circuit in harness between ECM and purge control solenoid valve connector.

•
Note

In this case, repair the following:

• Open circuit in harness between ECM and purge control solenoid valve connector

• Poor contact in coupling connector



CHECK PURGE CONTROL SOLENOID VALVE.

Remove the purge control solenoid valve.

Measure the resistance between purge control solenoid valve terminals.

Terminals

No. 1 — No. 2:

Is the resistance 10 — 100 Ω?

Yes


No

Replace the purge control solenoid valve.


CHECK POWER SUPPLY TO PURGE CONTROL SOLENOID VALVE.

Turn the ignition switch to ON.

Measure the voltage between purge control solenoid valve and engine ground.

Connector & terminal

(E4) No. 1 (+) — Engine ground (−):

Is the voltage more than 10 V?

Yes


No

Repair the open circuit in harness between main relay and purge control solenoid valve connector.


CHECK POOR CONTACT.

Check poor contact in purge control solenoid valve connector.

Is there poor contact in purge control solenoid valve connector?

Yes

Repair the poor contact in purge control solenoid valve connector.


No

Contact Service Center.