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DTC P0458: Evaporative Emission Control System Purge Control Valve Circuit Low Input

 
 
 
 
CIRCUIT OPERATION
  • The evaporative emission purge solenoid power is supplied from the MFI relay.
  • The ECM controls ground evaporative emission purge solenoid by turning the power transistor in the ECM "ON" and "OFF".
 
 
TECHNICAL DESCRIPTION
  • In response to a signal from the ECM, the evaporative emission purge solenoid valve controls the flow rate of the purge air to be introduced into the intake manifold.
 
 
DESCRIPTIONS OF MONITOR METHODS
  • The ECM detects open circuit and short malfunction.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • More than 2 seconds have passed since the power supply mode of the electric motor switch was ON.
  • 12V starter battery positive voltage is between 10 and 16.5 volts.
or
  • More than 2 seconds have passed since the key-off evaporative leakage monitoring was started.
  • 12V starter battery positive voltage is between 10 and 16.5 volts.
Judgment Criterion
  • The supply voltage is 3 volts or lower without the evaporative emission purge solenoid driving for 2 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • None.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Evaporative emission purge solenoid failed.
  • Open or shorted evaporative emission purge solenoid circuit, harness damage or connector damage.
  • ECM failed.

 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), check actuator test item 10: Evaporative Emission Purge Solenoid.
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) .
(2) Turn on the power supply mode of the electric motor switch.
(3) Set scan tool (M.U.T.-IIISE) to the actuator test mode for item 10, Evaporative Emission Purge Solenoid.
  • An operation sound should be heard and vibration should be felt when the evaporative emission purge solenoid is operated.
(4) Turn off the power supply mode of the electric motor switch.
Is the solenoid operating properly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Go to Step 2.
 
STEP 2. Check the evaporative emission purge solenoid.
(1) Disconnect connector, and measure at solenoid side.
(2) Measure the resistance between evaporative emission purge solenoid side connector terminals.
Standard value: 22 - 26 Ω [at 20°C (68°F)]
Is the measured resistance between 22 and 26 Ω [at 20°C (68°F)]?
Go to Step 3.
Replace the evaporative emission purge solenoid. Then go to Step 8.
 
STEP 3. Measure the power supply voltage at evaporative emission purge solenoid harness side connector.
(1) Disconnect the evaporative emission purge solenoid connector and measure at the harness side.
(2) Turn on the power supply mode of the electric motor switch.
(3) Measure the voltage between terminal power supply line and ground.
  • Voltage should be 12V starter battery positive voltage.
(4) Turn off the power supply mode of the electric motor switch.
Is 12V starter battery positive voltage (approximately 12 volts) present?
Go to Step 4.
Repair or replace the connector(s), or check and repair the harness of short to ground and open circuit in power supply line between MFI relay connector and evaporative emission purge solenoid connector. Then go to Step 8.
 
STEP 4. Measure the power supply voltage at ECM harness side connector.
(1) Disconnect connector and measure at the harness side.
(2) Turn on the power supply mode of the electric motor switch.
(3) Measure the voltage between terminal PURG and ground.
  • Voltage should be 12V starter battery positive voltage.
(4) Turn off the power supply mode of the electric motor switch.
Is 12V starter battery positive voltage (approximately 12 volts) present?
Go to Step 5.
Repair or replace the connector(s), or check and repair the harness of short to ground and open circuit in PURG line between evaporative emission purge solenoid connector and ECM connector. Then go to Step 8.
 
STEP 5. Check of harness damage in PURG line between evaporative emission purge solenoid connector and ECM connector.
Is the harness wire in good condition?
Go to Step 6.
Repair the connector(s) or wiring harness. Then go to Step 8.
 
STEP 6. Check of harness damage in power supply line between MFI relay connector and evaporative emission purge solenoid connector.
Is the harness wire in good condition?
Go to Step 7.
Repair the connector(s) or wiring harness. Then go to Step 8.
 
STEP 7. Using scan tool (M.U.T.-IIISE), check actuator test item 10: Evaporative Emission Purge Solenoid.
(1) Turn on the power supply mode of the electric motor switch.
(2) Set scan tool (M.U.T.-IIISE) to the actuator test mode for item 10, Evaporative Emission Purge Solenoid.
  • An operation sound should be heard and vibration should be felt when the evaporative emission purge solenoid is operated.
(3) Turn off the power supply mode of the electric motor switch.
Is the solenoid operating properly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Replace the ECM (Refer to Removal and Installation ). Then go to Step 8.
 
STEP 8. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0458 set?
Retry the troubleshooting.
The inspection is complete.