DTC P0458: Evaporative Emission System Purge Control Valve Circuit Low; DTC P0459: Evaporative Emission System Purge Control Valve Circuit High [03/2012 - ]: Procedure

1. Connect a Techstream to the DLC3.
   Fig 1: Purge Valve Applies Suction

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the vacuum hose (canister side) from the purge valve.
3. Start the engine.
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control.
6. When the purge valve is operated using the Techstream, check whether the port of the purge valve applies suction to your finger.

   OK

   Tester Operation	Specified Condition
   VSV ON	Purge valve port applies suction to finger
   VSV OFF	Purge valve port applies no suction to finger

   TEXT IN ILLUSTRATION
   
   

   *a	Purge valve ON
   *b	Purge valve OFF

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   7 

A: Go to next step 

1. Inspect the purge valve. Refer to INSPECTION [03/2012 - ] .

NG → See step   9 

OK: Go to next step 

1. Disconnect the purge valve connector.
   Fig 2: Checking Terminal Voltage (Purge Valve Power Source)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   d1-1 - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Purge valve)

NG → See step   6 

OK: Go to next step 

1. Disconnect the ECM connector.
2. Disconnect the purge valve connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   A36-11 (PRG) - d1-2	Always	Below 1 Ω

   Standard Resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   A36-11 (PRG) or d1-2 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON and turn the tester on.
7. Start the engine.
8. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
9. Enter the following menus: Powertrain / Engine / Trouble Codes.
10. Read DTCs.
    RESULT
    
    

    Result	Proceed to
    No DTC is output	A
    P0458 or P0459 is output	B

    HINT: 

    If the engine does not start, replace the ECM.

B → See step   10 

A → See step   8 

1. Inspect the EFI MAIN1 relay. Refer to ON-VEHICLE INSPECTION [03/2012 - ] - Step 1 .

NG → REPLACE RELAY (EFI MAIN1) 

OK: Go to next step 

1. Disconnect the purge valve connector.
2. Remove the EFI MAIN1 relay from the engine room relay block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   d1-1 - EFI MAIN1 relay terminal 3	Always	Below 1 Ω

   Standard Resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   d1-1 or EFI MAIN1 relay terminal 3 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   11