P0458
FA20 ENGINE CONTROL: SFI SYSTEM: P0458, P0459; Evaporative Emission System Purge Control Valve Circuit Low; 2013 MY FR-S [03/2012 -]
P0458 - Evaporative Emission System Purge Control Valve Circuit Low
P0459 - Evaporative Emission System Purge Control Valve Circuit High
DESCRIPTION
To reduce hydrocarbon emissions, evaporated fuel from the fuel tank is routed through a charcoal canister to the intake manifold for combustion in the cylinders.
The ECM changes the duty signals to the purge valve (Vacuum Switching Valve for Purge Control) so that the intake amount of hydrocarbon emissions is appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.
MONITOR DESCRIPTION
The ECM monitors the output terminal voltage when the vacuum switching valve assembly is actuated. By turning the FET in the ECM on and off, the purge valve assembly is subject to duty control. If the ECM control value (drive signal) and the output terminal voltage duty cycle continue to not match, then the ECM interprets this as a malfunction in the vacuum switching valve circuit, illuminates the MIL, and stores the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All
P0458
P0459
TYPICAL MALFUNCTION THRESHOLDS
P0458
P0459
CONFIRMATION DRIVING PATTERN
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Reading and Clearing Diagnostic Trouble Codes.
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on.
6. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
HINT
Check the engine coolant temperature is 20°C (68°F) or less at engine started.
7. Perform the following the confirmation driving pattern.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
a. Drive the vehicle at 80 km/h (50 mph) or more for 20 minutes or more [A].
b. Stop the vehicle.
c. Idle the engine for 1 minute or more [B].
8. Enter the following menus: Powertrain / Engine / Trouble Codes.
9. Read pending DTCs.
HINT
* If a pending DTC is output, the system is malfunctioning.
* If a pending DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
11. Input the DTC: P0458 or P0459.
12. Check the DTC judgment result.
HINT
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows ABNORMAL, the system has a malfunction.
13. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL)
(a) Connect a Techstream to the DLC3.
(b) Disconnect the vacuum hose (canister side) from the purge valve.
(c) Start the engine.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control.
(f) When the purge valve is operated using the Techstream, check whether the port of the purge valve applies suction to your finger.
OK:
Result
B -- CHECK HARNESS AND CONNECTOR (PURGE VALVE - EFI MAIN1 RELAY)
A -- Continue to next step.
2. INSPECT PURGE VALVE
(a) Inspect the purge valve Testing and Inspection.
NG -- REPLACE PURGE VALVE Removal
OK -- Continue to next step.
3. INSPECT PURGE VALVE (POWER SOURCE)
(a) Disconnect the purge valve connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- INSPECT RELAY (EFI MAIN1)
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (PURGE VALVE - ECM)
(a) Disconnect the ECM connector.
(b) Disconnect the purge valve connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
Standard Resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Turn the ignition switch to ON and turn the tester on.
(g) Start the engine.
(h) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Trouble Codes.
(j) Read DTCs.
Result
HINT
If the engine does not start, replace the ECM.
B -- REPLACE ECM Removal
A -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
6. INSPECT RELAY (EFI MAIN1)
(a) Inspect the EFI MAIN1 relay Testing and Inspection.
NG -- REPLACE RELAY (EFI MAIN1)
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (PURGE VALVE - EFI MAIN1 RELAY)
(a) Disconnect the purge valve connector.
(b) Remove the EFI MAIN1 relay from the engine room relay block assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
Standard Resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- GO TO ECM POWER SOURCE CIRCUIT ECM Power Source Circuit