DTC P0459: EVAP System (CPC) Purge Control Valve "A" Circuit High: Notes
DTC detecting condition:
Detected when two consecutive driving cycles with fault occur.
Trouble symptom:
Improper idling
CAUTION:
Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD
.
NOTE:
After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE
.
Wiring diagram:
Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM .
- CHECK HARNESS BETWEEN ECM AND PURGE CONTROL SOLENOID VALVE CONNECTOR.
- Turn the ignition switch to OFF.
- Disconnect the connector from ECM.
- Disconnect the connector from the purge control solenoid valve.
- Turn the ignition switch to ON.
- Measure the voltage between ECM connector and engine ground.
Connector and terminal.
(E158) No. 2 (+) - Engine ground (-):
Is the voltage 10 V or more?
Yes: Repair the short circuit to power in the harness between ECM connector and purge control solenoid valve connector.
No: Go to 2.
- CHECK PURGE CONTROL SOLENOID VALVE.
- Turn the ignition switch to OFF.
- Check the purge control solenoid valve. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DOTC)>PURGE CONTROL SOLENOID VALVE>INSPECTION .
Is the check result OK?
Yes: Repair the poor contact of ECM connector.
No: Replace the purge control solenoid valve. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DOTC)>PURGE CONTROL SOLENOID VALVE .